/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_06.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:10:17,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:10:17,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:10:17,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:10:17,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:10:17,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:10:17,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:10:17,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:10:17,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:10:17,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:10:17,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:10:17,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:10:17,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:10:17,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:10:17,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:10:17,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:10:17,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:10:17,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:10:17,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:10:17,419 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:10:17,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:10:17,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:10:17,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:10:17,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:10:17,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:10:17,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:10:17,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:10:17,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:10:17,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:10:17,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:10:17,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:10:17,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:10:17,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:10:17,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:10:17,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:10:17,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:10:17,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:10:17,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:10:17,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:10:17,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:10:17,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:10:17,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 09:10:17,514 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:10:17,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:10:17,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:10:17,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:10:17,516 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:10:17,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:10:17,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:10:17,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:10:17,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:10:17,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:10:17,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:10:17,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:10:17,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:10:17,518 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:10:17,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:10:17,518 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:10:17,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:10:17,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:10:17,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:10:17,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:10:17,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:10:17,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:10:17,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:10:17,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:10:17,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:10:17,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:10:17,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:10:17,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:10:17,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:10:17,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:10:17,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:10:17,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:10:17,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:10:17,944 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:10:17,944 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:10:17,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_06.i [2020-10-28 09:10:18,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/841f0cca6/e6ccf1522eff411985096b12e01a6107/FLAG3d8afcba8 [2020-10-28 09:10:18,643 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:10:18,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_06.i [2020-10-28 09:10:18,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/841f0cca6/e6ccf1522eff411985096b12e01a6107/FLAG3d8afcba8 [2020-10-28 09:10:18,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/841f0cca6/e6ccf1522eff411985096b12e01a6107 [2020-10-28 09:10:18,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:10:18,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:10:18,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:10:18,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:10:18,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:10:18,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:10:18" (1/1) ... [2020-10-28 09:10:18,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cab4213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:18, skipping insertion in model container [2020-10-28 09:10:18,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:10:18" (1/1) ... [2020-10-28 09:10:18,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:10:19,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:10:19,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:10:19,184 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:10:19,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:10:19,223 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:10:19,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:19 WrapperNode [2020-10-28 09:10:19,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:10:19,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:10:19,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:10:19,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:10:19,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:19" (1/1) ... [2020-10-28 09:10:19,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:19" (1/1) ... [2020-10-28 09:10:19,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:19" (1/1) ... [2020-10-28 09:10:19,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:19" (1/1) ... [2020-10-28 09:10:19,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:19" (1/1) ... [2020-10-28 09:10:19,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:19" (1/1) ... [2020-10-28 09:10:19,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:19" (1/1) ... [2020-10-28 09:10:19,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:10:19,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:10:19,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:10:19,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:10:19,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:10:19,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:10:19,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:10:19,363 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:10:19,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:10:19,364 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:10:19,365 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:10:19,365 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:10:19,365 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:10:19,365 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:10:19,365 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:10:19,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:10:19,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:10:19,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:10:19,367 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:10:19,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:10:19,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:10:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:10:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:10:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:10:19,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:10:19,869 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:10:19,870 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 09:10:19,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:10:19 BoogieIcfgContainer [2020-10-28 09:10:19,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:10:19,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:10:19,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:10:19,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:10:19,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:10:18" (1/3) ... [2020-10-28 09:10:19,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aaeefd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:10:19, skipping insertion in model container [2020-10-28 09:10:19,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:10:19" (2/3) ... [2020-10-28 09:10:19,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aaeefd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:10:19, skipping insertion in model container [2020-10-28 09:10:19,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:10:19" (3/3) ... [2020-10-28 09:10:19,883 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_06.i [2020-10-28 09:10:19,895 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:10:19,901 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:10:19,916 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:10:19,963 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:10:19,963 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:10:19,963 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:10:19,963 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:10:19,964 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:10:19,964 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:10:19,964 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:10:19,964 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:10:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-28 09:10:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:10:19,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:20,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:20,000 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:20,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:20,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1774182118, now seen corresponding path program 1 times [2020-10-28 09:10:20,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:20,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286900865] [2020-10-28 09:10:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:20,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:20,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:20,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:20,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:10:20,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:20,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-28 09:10:20,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:20,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:20,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:20,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 09:10:20,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:20,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:10:20,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:20,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:20,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:20,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:20,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:20,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 09:10:20,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:20,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:20,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:20,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:20,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:20,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:10:20,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286900865] [2020-10-28 09:10:20,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:10:20,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:10:20,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106209416] [2020-10-28 09:10:20,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:10:20,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:20,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:10:20,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:10:20,698 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-28 09:10:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:20,791 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-10-28 09:10:20,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:10:20,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-28 09:10:20,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:20,801 INFO L225 Difference]: With dead ends: 48 [2020-10-28 09:10:20,802 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 09:10:20,805 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 [2020-10-28 09:10:20,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 09:10:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 09:10:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 09:10:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-28 09:10:20,849 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-10-28 09:10:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:20,849 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-28 09:10:20,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:10:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-28 09:10:20,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:10:20,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:20,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:20,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:10:20,852 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash 414065378, now seen corresponding path program 1 times [2020-10-28 09:10:20,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:20,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384554763] [2020-10-28 09:10:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:20,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:20,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:21,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:21,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:10:21,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:10:21,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-28 09:10:21,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:21,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:21,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:10:21,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:10:21,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:10:21,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:21,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:21,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:21,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:21,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:21,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:21,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:10:21,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:21,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:21,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:21,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:10:21,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384554763] [2020-10-28 09:10:21,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:10:21,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:10:21,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862979357] [2020-10-28 09:10:21,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:10:21,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:21,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:10:21,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:10:21,200 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-10-28 09:10:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:21,288 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-28 09:10:21,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:10:21,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 09:10:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:21,291 INFO L225 Difference]: With dead ends: 40 [2020-10-28 09:10:21,291 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 09:10:21,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:10:21,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 09:10:21,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-28 09:10:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 09:10:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-28 09:10:21,304 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-28 09:10:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:21,305 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-28 09:10:21,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:10:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-28 09:10:21,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 09:10:21,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:21,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:21,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:10:21,306 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:21,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1170351871, now seen corresponding path program 1 times [2020-10-28 09:10:21,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:21,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774469724] [2020-10-28 09:10:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:21,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:21,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:21,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:22,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:22,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 09:10:22,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:22,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 882 [2020-10-28 09:10:22,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:22,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:22,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:10:22,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 09:10:22,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 09:10:22,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:22,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:22,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:22,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:22,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:22,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:22,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:10:22,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:22,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:22,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:22,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:22,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:10:22,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774469724] [2020-10-28 09:10:22,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:22,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:10:22,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445447568] [2020-10-28 09:10:22,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:10:22,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:22,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:10:22,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:10:22,298 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-28 09:10:22,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:22,415 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-28 09:10:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:10:22,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 09:10:22,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:22,417 INFO L225 Difference]: With dead ends: 46 [2020-10-28 09:10:22,417 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:10:22,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:10:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:10:22,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-10-28 09:10:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 09:10:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-28 09:10:22,427 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2020-10-28 09:10:22,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:22,427 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-28 09:10:22,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:10:22,428 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-28 09:10:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:10:22,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:22,429 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:22,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:10:22,429 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:22,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:22,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1420739774, now seen corresponding path program 2 times [2020-10-28 09:10:22,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:22,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913681843] [2020-10-28 09:10:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:22,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:22,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:22,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:23,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:23,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:10:23,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:23,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-28 09:10:23,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:23,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:10:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:10:23,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:23,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:23,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:23,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:23,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:23,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:23,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:10:23,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:23,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:23,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:23,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:23,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:23,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 09:10:23,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913681843] [2020-10-28 09:10:23,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:23,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:10:23,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140612364] [2020-10-28 09:10:23,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:10:23,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:23,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:10:23,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:10:23,313 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-28 09:10:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:23,419 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-28 09:10:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:10:23,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-28 09:10:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:23,420 INFO L225 Difference]: With dead ends: 45 [2020-10-28 09:10:23,420 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:10:23,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:10:23,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:10:23,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-28 09:10:23,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 09:10:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-28 09:10:23,428 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-10-28 09:10:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:23,429 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-28 09:10:23,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:10:23,429 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-28 09:10:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 09:10:23,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:23,430 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:23,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:10:23,430 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:23,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:23,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1957781260, now seen corresponding path program 3 times [2020-10-28 09:10:23,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:23,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166374992] [2020-10-28 09:10:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:23,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:23,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:23,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:24,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 09:10:24,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:24,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1064 [2020-10-28 09:10:24,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:24,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:24,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:10:24,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:24,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:10:24,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:24,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:24,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:24,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:24,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:24,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:10:24,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:24,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:24,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:24,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:24,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:24,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 09:10:24,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166374992] [2020-10-28 09:10:24,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:24,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:10:24,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812346780] [2020-10-28 09:10:24,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:10:24,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:24,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:10:24,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:10:24,646 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-28 09:10:24,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:24,801 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-28 09:10:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:10:24,802 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-28 09:10:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:24,803 INFO L225 Difference]: With dead ends: 46 [2020-10-28 09:10:24,803 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 09:10:24,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:10:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 09:10:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-28 09:10:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 09:10:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-28 09:10:24,817 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-10-28 09:10:24,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:24,817 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-28 09:10:24,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:10:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-28 09:10:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:10:24,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:24,819 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:24,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:10:24,819 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:24,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:24,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1426198142, now seen corresponding path program 4 times [2020-10-28 09:10:24,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:24,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487775268] [2020-10-28 09:10:24,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:24,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:24,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:25,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:25,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:25,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 09:10:25,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:25,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-10-28 09:10:25,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:25,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:25,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:10:25,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:25,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:10:25,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:25,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:25,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:25,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:25,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:25,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:25,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:10:25,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:25,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:25,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:25,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:25,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:25,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 09:10:25,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487775268] [2020-10-28 09:10:25,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:25,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:10:25,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032891948] [2020-10-28 09:10:25,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:10:25,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:25,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:10:25,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:10:25,995 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-28 09:10:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:26,110 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-28 09:10:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:10:26,111 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 09:10:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:26,112 INFO L225 Difference]: With dead ends: 47 [2020-10-28 09:10:26,112 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:10:26,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:10:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:10:26,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-28 09:10:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 09:10:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-28 09:10:26,119 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2020-10-28 09:10:26,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:26,119 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-28 09:10:26,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:10:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-28 09:10:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:10:26,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:26,120 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:26,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:10:26,121 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2126990668, now seen corresponding path program 5 times [2020-10-28 09:10:26,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:26,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289211523] [2020-10-28 09:10:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:26,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:26,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:26,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:27,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:27,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 09:10:27,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:27,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1276 [2020-10-28 09:10:27,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:27,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:27,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:10:27,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 09:10:27,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:10:27,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:27,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:27,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:27,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:27,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:27,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:27,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:27,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:27,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:27,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:27,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:27,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:27,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:10:27,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289211523] [2020-10-28 09:10:27,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:27,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:10:27,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998210288] [2020-10-28 09:10:27,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:10:27,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:27,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:10:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:10:27,501 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-28 09:10:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:27,665 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-28 09:10:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:10:27,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-28 09:10:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:27,667 INFO L225 Difference]: With dead ends: 50 [2020-10-28 09:10:27,667 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 09:10:27,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:10:27,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 09:10:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-10-28 09:10:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 09:10:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-28 09:10:27,675 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2020-10-28 09:10:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:27,675 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-28 09:10:27,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:10:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-28 09:10:27,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:10:27,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:27,677 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:27,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:10:27,677 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:27,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:27,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1964278815, now seen corresponding path program 6 times [2020-10-28 09:10:27,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:27,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269966476] [2020-10-28 09:10:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:27,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:27,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:27,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:29,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:29,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:10:29,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:29,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1619 [2020-10-28 09:10:29,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:29,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:29,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:10:29,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:29,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:10:29,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:29,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:29,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:29,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:29,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:29,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:29,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:29,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:29,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:29,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:29,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:29,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:29,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:10:29,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269966476] [2020-10-28 09:10:29,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:29,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:10:29,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578159101] [2020-10-28 09:10:29,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:10:29,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:29,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:10:29,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:10:29,409 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-28 09:10:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:29,532 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-28 09:10:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:10:29,533 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-28 09:10:29,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:29,534 INFO L225 Difference]: With dead ends: 50 [2020-10-28 09:10:29,534 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 09:10:29,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:10:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 09:10:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-28 09:10:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:10:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-28 09:10:29,540 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-10-28 09:10:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:29,540 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-28 09:10:29,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:10:29,541 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-28 09:10:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 09:10:29,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:29,541 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:29,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:10:29,542 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:29,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:29,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1116030829, now seen corresponding path program 7 times [2020-10-28 09:10:29,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:29,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143400231] [2020-10-28 09:10:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:29,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:29,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:29,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:31,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:31,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 09:10:31,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:31,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1839 [2020-10-28 09:10:31,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:31,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:31,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:10:31,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:31,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:10:31,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:31,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:31,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:31,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:31,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:31,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:31,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:31,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:31,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:31,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:31,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:31,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:31,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:10:31,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143400231] [2020-10-28 09:10:31,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:31,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:10:31,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810592292] [2020-10-28 09:10:31,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:10:31,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:31,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:10:31,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:10:31,523 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2020-10-28 09:10:31,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:31,658 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-28 09:10:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:10:31,658 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 09:10:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:31,659 INFO L225 Difference]: With dead ends: 51 [2020-10-28 09:10:31,659 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 09:10:31,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:10:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 09:10:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-28 09:10:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 09:10:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-28 09:10:31,665 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2020-10-28 09:10:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:31,666 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-28 09:10:31,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:10:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-28 09:10:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 09:10:31,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:31,667 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:31,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:10:31,667 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:31,668 INFO L82 PathProgramCache]: Analyzing trace with hash -590147039, now seen corresponding path program 8 times [2020-10-28 09:10:31,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:31,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651437454] [2020-10-28 09:10:31,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:31,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:31,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:31,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:33,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:33,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 09:10:33,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:33,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2219 [2020-10-28 09:10:33,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:33,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:33,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:10:33,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:10:33,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:10:33,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:10:33,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:33,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:33,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:33,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:33,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:33,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:33,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:33,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:33,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:33,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:33,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:33,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 09:10:33,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651437454] [2020-10-28 09:10:33,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:33,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:10:33,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117276920] [2020-10-28 09:10:33,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:10:33,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:33,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:10:33,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:10:33,988 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states. [2020-10-28 09:10:34,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:34,134 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-10-28 09:10:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:10:34,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-28 09:10:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:34,135 INFO L225 Difference]: With dead ends: 56 [2020-10-28 09:10:34,135 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 09:10:34,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:10:34,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 09:10:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-10-28 09:10:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 09:10:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-28 09:10:34,142 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2020-10-28 09:10:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:34,142 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-28 09:10:34,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:10:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-28 09:10:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:10:34,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:34,144 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:34,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:10:34,144 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:34,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:34,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1566766572, now seen corresponding path program 9 times [2020-10-28 09:10:34,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:34,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060455247] [2020-10-28 09:10:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:34,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:34,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:34,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:36,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:36,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 09:10:36,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:36,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2706 [2020-10-28 09:10:36,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:36,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:36,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:10:36,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:36,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:10:36,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:36,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:36,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:36,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:36,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:36,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:36,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:10:36,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:36,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:37,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:37,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:37,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:37,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 09:10:37,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060455247] [2020-10-28 09:10:37,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:37,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:10:37,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170660507] [2020-10-28 09:10:37,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:10:37,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:37,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:10:37,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:10:37,008 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-10-28 09:10:37,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:37,162 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-28 09:10:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:10:37,163 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-28 09:10:37,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:37,163 INFO L225 Difference]: With dead ends: 57 [2020-10-28 09:10:37,164 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 09:10:37,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:10:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 09:10:37,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-10-28 09:10:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 09:10:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-28 09:10:37,172 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2020-10-28 09:10:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:37,175 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-28 09:10:37,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:10:37,175 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-28 09:10:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 09:10:37,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:37,178 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:37,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:10:37,179 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:37,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:37,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1296381986, now seen corresponding path program 10 times [2020-10-28 09:10:37,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:37,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231314492] [2020-10-28 09:10:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:37,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:37,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:37,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:39,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:39,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 09:10:39,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:39,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2284 [2020-10-28 09:10:39,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:39,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:39,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:10:39,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:10:39,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:10:39,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:39,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:39,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:39,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:39,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:39,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:39,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:39,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:39,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:39,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:39,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:39,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:39,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 09:10:39,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231314492] [2020-10-28 09:10:39,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:39,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:10:39,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622053504] [2020-10-28 09:10:39,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:10:39,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:39,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:10:39,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:10:39,573 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 8 states. [2020-10-28 09:10:39,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:39,732 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-28 09:10:39,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:10:39,733 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-28 09:10:39,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:39,734 INFO L225 Difference]: With dead ends: 61 [2020-10-28 09:10:39,734 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 09:10:39,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:10:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 09:10:39,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2020-10-28 09:10:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 09:10:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-28 09:10:39,741 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-10-28 09:10:39,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:39,741 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-28 09:10:39,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:10:39,741 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-28 09:10:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 09:10:39,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:39,742 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:39,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:10:39,743 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:39,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:39,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1081058355, now seen corresponding path program 11 times [2020-10-28 09:10:39,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:39,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890199130] [2020-10-28 09:10:39,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:39,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:39,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:39,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:42,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:42,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:10:42,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:42,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2551 [2020-10-28 09:10:42,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:42,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:42,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:10:42,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:42,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:10:42,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:42,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:42,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:42,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:42,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:42,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:42,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:10:42,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:42,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:42,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:42,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:42,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:42,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:10:42,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890199130] [2020-10-28 09:10:42,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:42,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:10:42,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710778051] [2020-10-28 09:10:42,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:10:42,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:42,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:10:42,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:10:42,455 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 12 states. [2020-10-28 09:10:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:42,587 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-28 09:10:42,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:10:42,587 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-28 09:10:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:42,588 INFO L225 Difference]: With dead ends: 60 [2020-10-28 09:10:42,588 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 09:10:42,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:10:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 09:10:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-10-28 09:10:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 09:10:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-28 09:10:42,599 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2020-10-28 09:10:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:42,599 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-28 09:10:42,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:10:42,599 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-28 09:10:42,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:10:42,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:42,600 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:42,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:10:42,601 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:42,601 INFO L82 PathProgramCache]: Analyzing trace with hash -507214143, now seen corresponding path program 12 times [2020-10-28 09:10:42,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:42,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539674589] [2020-10-28 09:10:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:42,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:42,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:42,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:45,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:45,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 09:10:45,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:45,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2898 [2020-10-28 09:10:45,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:45,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:45,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:10:45,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:45,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:10:45,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:45,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:45,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:45,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:45,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:45,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:45,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:45,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:45,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:45,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:45,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:45,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:45,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:10:45,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539674589] [2020-10-28 09:10:45,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:45,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:10:45,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802537777] [2020-10-28 09:10:45,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:10:45,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:45,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:10:45,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:10:45,690 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 13 states. [2020-10-28 09:10:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:45,833 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-10-28 09:10:45,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:10:45,834 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-28 09:10:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:45,835 INFO L225 Difference]: With dead ends: 61 [2020-10-28 09:10:45,835 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 09:10:45,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:10:45,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 09:10:45,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-10-28 09:10:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 09:10:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-28 09:10:45,847 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-10-28 09:10:45,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:45,849 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-28 09:10:45,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:10:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-28 09:10:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 09:10:45,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:45,850 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:45,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:10:45,851 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:45,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1795945971, now seen corresponding path program 13 times [2020-10-28 09:10:45,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:45,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493496450] [2020-10-28 09:10:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:45,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:45,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:46,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:49,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:49,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 09:10:49,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:49,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3690 [2020-10-28 09:10:49,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:49,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:49,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:10:49,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:10:49,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:10:49,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:49,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:49,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:49,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:49,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:49,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:49,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:10:49,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:49,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:49,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:49,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:49,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:49,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-28 09:10:49,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493496450] [2020-10-28 09:10:49,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:49,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:10:49,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920210648] [2020-10-28 09:10:49,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:10:49,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:49,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:10:49,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:10:49,679 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2020-10-28 09:10:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:49,861 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-10-28 09:10:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:10:49,862 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-28 09:10:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:49,863 INFO L225 Difference]: With dead ends: 67 [2020-10-28 09:10:49,864 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 09:10:49,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:10:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 09:10:49,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2020-10-28 09:10:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 09:10:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-28 09:10:49,870 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2020-10-28 09:10:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:49,870 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-28 09:10:49,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:10:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-28 09:10:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:10:49,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:49,871 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:49,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:10:49,872 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:49,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:49,872 INFO L82 PathProgramCache]: Analyzing trace with hash -612327294, now seen corresponding path program 14 times [2020-10-28 09:10:49,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:49,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064424523] [2020-10-28 09:10:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:49,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:49,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:50,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:53,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:53,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:10:53,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:53,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3386 [2020-10-28 09:10:53,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:53,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:53,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:10:53,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:10:53,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:10:53,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:53,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:53,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:53,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:53,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:53,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:53,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:10:53,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:53,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:53,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:53,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:53,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:53,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 09:10:53,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064424523] [2020-10-28 09:10:53,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:53,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:10:53,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908619880] [2020-10-28 09:10:53,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:10:53,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:53,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:10:53,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:10:53,486 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-28 09:10:53,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:53,644 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-28 09:10:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:10:53,645 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-28 09:10:53,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:53,645 INFO L225 Difference]: With dead ends: 64 [2020-10-28 09:10:53,645 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 09:10:53,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:10:53,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 09:10:53,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-10-28 09:10:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:10:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-28 09:10:53,652 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2020-10-28 09:10:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:53,652 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-28 09:10:53,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:10:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-28 09:10:53,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 09:10:53,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:53,653 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:53,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:10:53,653 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:53,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:53,654 INFO L82 PathProgramCache]: Analyzing trace with hash 816384820, now seen corresponding path program 15 times [2020-10-28 09:10:53,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:53,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875806331] [2020-10-28 09:10:53,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:53,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:53,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:53,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:56,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:56,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 09:10:56,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:56,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3181 [2020-10-28 09:10:56,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:56,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:56,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:10:56,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 09:10:56,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:10:56,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:57,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:57,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:57,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:57,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:57,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:57,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:57,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:57,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:57,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:57,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:57,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:57,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 09:10:57,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875806331] [2020-10-28 09:10:57,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:57,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:10:57,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994138259] [2020-10-28 09:10:57,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:10:57,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:57,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:10:57,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:10:57,121 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 10 states. [2020-10-28 09:10:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:57,314 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-28 09:10:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:10:57,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-28 09:10:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:57,315 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:10:57,316 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 09:10:57,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:10:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 09:10:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2020-10-28 09:10:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 09:10:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-28 09:10:57,322 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-10-28 09:10:57,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:57,322 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-28 09:10:57,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:10:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-28 09:10:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 09:10:57,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:57,323 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:57,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:10:57,324 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:57,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:57,324 INFO L82 PathProgramCache]: Analyzing trace with hash -913951903, now seen corresponding path program 16 times [2020-10-28 09:10:57,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:57,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523069821] [2020-10-28 09:10:57,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:57,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:57,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:57,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:00,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:00,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 09:11:00,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:00,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3396 [2020-10-28 09:11:00,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:00,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:00,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:11:00,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:00,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:11:00,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:01,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:01,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:01,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:01,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:01,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:01,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:01,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:01,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:01,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:01,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:01,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 09:11:01,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523069821] [2020-10-28 09:11:01,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:01,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:11:01,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184533757] [2020-10-28 09:11:01,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:11:01,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:01,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:11:01,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:11:01,327 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 16 states. [2020-10-28 09:11:01,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:01,765 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-28 09:11:01,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:11:01,766 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-28 09:11:01,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:01,767 INFO L225 Difference]: With dead ends: 50 [2020-10-28 09:11:01,768 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 09:11:01,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:11:01,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 09:11:01,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-28 09:11:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 09:11:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-28 09:11:01,777 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 35 [2020-10-28 09:11:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:01,777 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-28 09:11:01,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:11:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-28 09:11:01,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 09:11:01,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:01,779 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:01,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:11:01,779 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:01,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:01,779 INFO L82 PathProgramCache]: Analyzing trace with hash -574782445, now seen corresponding path program 1 times [2020-10-28 09:11:01,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:01,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022912409] [2020-10-28 09:11:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:01,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:01,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:02,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:06,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:06,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 09:11:06,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:06,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:11:06,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:06,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:06,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:11:06,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:06,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:11:06,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:06,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:06,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:06,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:06,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:06,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:06,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:11:06,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:06,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:06,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:06,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:06,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:06,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:06,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 09:11:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:06,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:06,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:06,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:06,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:06,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:06,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:06,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:06,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:11:06,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022912409] [2020-10-28 09:11:06,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:06,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:11:06,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844338683] [2020-10-28 09:11:06,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:11:07,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:07,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:11:07,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:11:07,001 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 15 states. [2020-10-28 09:11:07,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:07,182 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-10-28 09:11:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:11:07,183 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-28 09:11:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:07,184 INFO L225 Difference]: With dead ends: 77 [2020-10-28 09:11:07,184 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 09:11:07,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:11:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 09:11:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-28 09:11:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 09:11:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-28 09:11:07,202 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2020-10-28 09:11:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:07,202 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-28 09:11:07,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:11:07,202 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-28 09:11:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 09:11:07,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:07,203 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:07,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:11:07,204 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:07,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:07,204 INFO L82 PathProgramCache]: Analyzing trace with hash 427622817, now seen corresponding path program 2 times [2020-10-28 09:11:07,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:07,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400334562] [2020-10-28 09:11:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:07,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:07,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:07,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:12,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:12,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 09:11:12,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:12,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:11:12,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:12,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:11:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:11:12,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:12,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:12,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:12,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:12,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:12,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:12,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:12,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:12,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:12,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:12,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:12,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:12,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:12,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-28 09:11:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:12,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:12,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:12,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:12,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:12,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:12,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:12,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:12,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:12,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:12,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:12,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:11:12,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400334562] [2020-10-28 09:11:12,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:12,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:11:12,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054676926] [2020-10-28 09:11:12,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:11:12,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:12,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:11:12,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:11:12,468 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2020-10-28 09:11:12,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:12,710 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-10-28 09:11:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:11:12,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-28 09:11:12,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:12,711 INFO L225 Difference]: With dead ends: 78 [2020-10-28 09:11:12,711 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 09:11:12,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:11:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 09:11:12,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-28 09:11:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 09:11:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-28 09:11:12,729 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2020-10-28 09:11:12,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:12,729 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-28 09:11:12,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:11:12,729 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-28 09:11:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 09:11:12,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:12,732 INFO L422 BasicCegarLoop]: trace histogram [13, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:12,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:11:12,732 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:12,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:12,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1437414867, now seen corresponding path program 3 times [2020-10-28 09:11:12,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:12,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631852363] [2020-10-28 09:11:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:12,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:12,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:13,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:17,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:17,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 09:11:17,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:17,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:11:17,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:17,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:17,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:11:17,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 09:11:17,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:11:17,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:17,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:17,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:17,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:17,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:17,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:17,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:11:17,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:17,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:17,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:17,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:17,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:17,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:17,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 09:11:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:17,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:17,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:17,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:17,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:17,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:17,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:17,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:17,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:17,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-28 09:11:17,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631852363] [2020-10-28 09:11:17,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:17,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:11:17,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390064030] [2020-10-28 09:11:17,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:11:17,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:17,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:11:17,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:11:17,902 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 11 states. [2020-10-28 09:11:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:18,155 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-28 09:11:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:11:18,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-28 09:11:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:18,156 INFO L225 Difference]: With dead ends: 88 [2020-10-28 09:11:18,157 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:11:18,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:11:18,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:11:18,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2020-10-28 09:11:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:11:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-28 09:11:18,175 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2020-10-28 09:11:18,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:18,177 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-28 09:11:18,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:11:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-28 09:11:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:11:18,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:18,178 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:18,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:11:18,178 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:18,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1862224512, now seen corresponding path program 4 times [2020-10-28 09:11:18,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:18,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253718472] [2020-10-28 09:11:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:18,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:18,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:18,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:23,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:23,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:11:23,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:23,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:11:23,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:23,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:23,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:11:23,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:23,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:11:23,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:23,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:23,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:23,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:23,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:23,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:23,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:23,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:23,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:23,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:23,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:23,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:23,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:23,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-28 09:11:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:23,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:23,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:23,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:23,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:23,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:23,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:23,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:23,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-28 09:11:23,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253718472] [2020-10-28 09:11:23,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:23,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:11:23,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237902128] [2020-10-28 09:11:23,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:11:23,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:23,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:11:23,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:11:23,660 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 18 states. [2020-10-28 09:11:24,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:24,374 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-28 09:11:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:11:24,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-28 09:11:24,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:24,376 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:11:24,376 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 09:11:24,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:11:24,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 09:11:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-10-28 09:11:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 09:11:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-28 09:11:24,387 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 45 [2020-10-28 09:11:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:24,387 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-28 09:11:24,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:11:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-28 09:11:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:11:24,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:24,388 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:24,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:11:24,388 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2045693676, now seen corresponding path program 5 times [2020-10-28 09:11:24,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:24,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471878471] [2020-10-28 09:11:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:24,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:24,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:27,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:29,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:29,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:11:29,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:29,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:11:29,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:29,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:29,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:11:29,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:29,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:11:29,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:29,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:29,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:29,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:29,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:29,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:29,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:29,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:29,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:29,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:29,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:29,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:29,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:29,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-28 09:11:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:29,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:29,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:29,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:29,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:29,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:29,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:29,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:29,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:29,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:29,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:29,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:29,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 09:11:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:29,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:29,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:29,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:29,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:29,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:29,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:29,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:29,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:29,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:29,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:29,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-28 09:11:29,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471878471] [2020-10-28 09:11:29,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:29,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:11:29,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702014070] [2020-10-28 09:11:29,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:11:29,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:29,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:11:29,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:11:29,670 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 17 states. [2020-10-28 09:11:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:29,894 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-10-28 09:11:29,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:11:29,894 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-28 09:11:29,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:29,895 INFO L225 Difference]: With dead ends: 95 [2020-10-28 09:11:29,895 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 09:11:29,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:11:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 09:11:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-28 09:11:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:11:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-28 09:11:29,905 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-10-28 09:11:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:29,906 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-28 09:11:29,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:11:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-28 09:11:29,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 09:11:29,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:29,907 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:29,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:11:29,907 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:29,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:29,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1590455006, now seen corresponding path program 6 times [2020-10-28 09:11:29,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:29,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439163781] [2020-10-28 09:11:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:29,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:29,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:32,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:34,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:34,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 09:11:34,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:34,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:11:34,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:34,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:34,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:11:34,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:34,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:11:34,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:35,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:35,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:35,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:35,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:35,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:35,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:35,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:35,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:35,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:35,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:35,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:35,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:35,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:11:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:35,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:35,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:35,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:35,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:35,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:11:35,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:35,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:35,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:35,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:35,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:35,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:35,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 09:11:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:35,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:35,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:35,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:35,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:35,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:11:35,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:35,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:35,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:35,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-28 09:11:35,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439163781] [2020-10-28 09:11:35,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:35,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:11:35,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429256540] [2020-10-28 09:11:35,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:11:35,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:35,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:11:35,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:11:35,196 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 18 states. [2020-10-28 09:11:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:35,368 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2020-10-28 09:11:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:11:35,369 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-10-28 09:11:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:35,370 INFO L225 Difference]: With dead ends: 96 [2020-10-28 09:11:35,370 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 09:11:35,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:11:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 09:11:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-10-28 09:11:35,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 09:11:35,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-28 09:11:35,383 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 53 [2020-10-28 09:11:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:35,383 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-28 09:11:35,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:11:35,384 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-28 09:11:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:11:35,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:35,384 INFO L422 BasicCegarLoop]: trace histogram [15, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:35,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:11:35,387 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:35,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:35,387 INFO L82 PathProgramCache]: Analyzing trace with hash -362958124, now seen corresponding path program 7 times [2020-10-28 09:11:35,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:35,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159750076] [2020-10-28 09:11:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:35,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:35,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:37,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:40,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:40,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 09:11:40,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:40,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:11:40,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:40,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:40,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:11:40,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 09:11:40,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:11:40,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:40,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:40,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:40,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:40,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:40,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:40,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:40,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:40,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:40,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:40,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:40,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:40,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:40,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 09:11:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:40,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:40,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:40,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:40,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:40,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:40,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:40,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:40,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:40,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:40,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:40,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:11:40,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:11:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:40,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:40,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:40,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:40,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:40,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:40,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:40,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:40,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:40,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:40,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:40,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-10-28 09:11:40,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159750076] [2020-10-28 09:11:40,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:40,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:11:40,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960257181] [2020-10-28 09:11:40,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:11:40,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:40,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:11:40,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:11:40,561 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 12 states. [2020-10-28 09:11:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:40,814 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2020-10-28 09:11:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:11:40,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-28 09:11:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:40,816 INFO L225 Difference]: With dead ends: 105 [2020-10-28 09:11:40,816 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 09:11:40,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:11:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 09:11:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 58. [2020-10-28 09:11:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 09:11:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-28 09:11:40,827 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 54 [2020-10-28 09:11:40,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:40,827 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-28 09:11:40,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:11:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-28 09:11:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 09:11:40,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:40,828 INFO L422 BasicCegarLoop]: trace histogram [15, 9, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:40,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:11:40,828 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:40,829 INFO L82 PathProgramCache]: Analyzing trace with hash 150497793, now seen corresponding path program 8 times [2020-10-28 09:11:40,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:40,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938476956] [2020-10-28 09:11:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:40,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:40,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:43,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:45,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:45,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 09:11:45,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:45,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:11:45,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:45,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:45,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:11:45,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:45,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:11:45,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:46,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:46,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:46,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:46,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:46,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:46,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:46,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:46,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:46,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:46,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:46,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:46,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:46,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 09:11:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:46,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:46,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:46,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:46,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:46,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:46,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:46,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:46,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:46,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:46,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:46,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:46,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 09:11:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:46,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:46,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:46,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:46,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:46,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:46,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:46,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:46,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:11:46,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938476956] [2020-10-28 09:11:46,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:46,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:11:46,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036821982] [2020-10-28 09:11:46,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:11:46,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:46,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:11:46,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:11:46,136 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 19 states. [2020-10-28 09:11:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:46,290 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2020-10-28 09:11:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:11:46,291 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-10-28 09:11:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:46,292 INFO L225 Difference]: With dead ends: 99 [2020-10-28 09:11:46,292 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 09:11:46,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:11:46,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 09:11:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2020-10-28 09:11:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 09:11:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-28 09:11:46,303 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2020-10-28 09:11:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:46,304 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-28 09:11:46,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:11:46,304 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-28 09:11:46,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 09:11:46,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:46,310 INFO L422 BasicCegarLoop]: trace histogram [16, 9, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:46,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:11:46,310 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:46,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:46,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1341005005, now seen corresponding path program 9 times [2020-10-28 09:11:46,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:46,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289910268] [2020-10-28 09:11:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:46,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:46,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:49,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:51,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:51,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 09:11:51,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:51,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:11:51,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:51,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:51,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:11:51,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:11:51,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:11:51,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:51,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:51,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:51,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:51,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:51,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:51,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:51,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:51,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:51,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:51,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:51,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:51,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:51,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-28 09:11:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:51,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:51,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:51,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:51,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:51,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:11:51,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:51,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:51,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:51,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:11:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:51,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:51,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:51,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:51,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:51,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:11:51,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:51,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:51,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:51,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:11:51,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:51,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-28 09:11:51,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289910268] [2020-10-28 09:11:51,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:51,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:11:51,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624421931] [2020-10-28 09:11:51,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:11:51,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:51,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:11:51,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:11:51,490 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 13 states. [2020-10-28 09:11:51,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:51,754 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2020-10-28 09:11:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:11:51,755 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-28 09:11:51,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:51,756 INFO L225 Difference]: With dead ends: 110 [2020-10-28 09:11:51,756 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 09:11:51,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:11:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 09:11:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2020-10-28 09:11:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:11:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-28 09:11:51,775 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 56 [2020-10-28 09:11:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:51,776 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-28 09:11:51,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:11:51,776 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-28 09:11:51,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 09:11:51,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:51,777 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:51,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:11:51,777 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:51,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:51,777 INFO L82 PathProgramCache]: Analyzing trace with hash -104184446, now seen corresponding path program 10 times [2020-10-28 09:11:51,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:51,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55126653] [2020-10-28 09:11:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:51,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:51,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:55,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:56,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:56,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:11:56,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:11:56,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:11:56,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:56,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:56,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:11:56,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:11:56,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 09:11:56,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:57,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:11:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:57,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:57,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:57,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:11:57,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:57,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:11:57,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:57,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:57,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:11:57,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:57,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:11:57,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:57,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 09:11:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:57,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:57,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:57,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:57,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:57,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:57,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:57,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:57,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:57,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:57,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:57,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:57,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 09:11:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:57,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:57,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:11:57,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:11:57,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:11:57,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:11:57,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:11:57,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:11:57,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:11:57,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:11:57,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:11:57,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:11:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-28 09:11:57,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55126653] [2020-10-28 09:11:57,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:11:57,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:11:57,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226348272] [2020-10-28 09:11:57,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:11:57,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:11:57,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:11:57,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:11:57,389 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 21 states. [2020-10-28 09:11:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:11:58,366 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-28 09:11:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:11:58,367 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-10-28 09:11:58,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:11:58,368 INFO L225 Difference]: With dead ends: 87 [2020-10-28 09:11:58,370 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 09:11:58,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:11:58,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 09:11:58,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-28 09:11:58,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:11:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-28 09:11:58,387 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 57 [2020-10-28 09:11:58,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:11:58,387 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-28 09:11:58,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:11:58,387 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-28 09:11:58,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 09:11:58,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:11:58,388 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:11:58,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:11:58,389 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:11:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:11:58,389 INFO L82 PathProgramCache]: Analyzing trace with hash -769131822, now seen corresponding path program 11 times [2020-10-28 09:11:58,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:11:58,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28136101] [2020-10-28 09:11:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:11:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:11:58,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:11:58,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:02,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:03,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:03,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 09:12:03,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:12:03,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:12:03,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:03,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:03,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:12:03,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:03,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:12:03,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:03,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:03,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:03,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:03,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:03,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:03,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:03,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:03,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:03,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:03,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:03,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:03,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:03,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 09:12:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:03,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:03,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:03,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:03,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:03,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:03,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:03,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:03,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:03,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:03,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:03,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:03,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 09:12:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:03,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:03,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:03,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:03,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:03,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:03,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:03,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:03,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:03,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:03,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:03,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:03,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:12:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:03,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:03,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:03,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:03,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:03,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:03,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:03,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:03,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:03,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:03,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:03,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-28 09:12:03,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28136101] [2020-10-28 09:12:03,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:03,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:12:03,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223656537] [2020-10-28 09:12:03,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:12:03,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:03,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:12:03,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:12:03,753 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 20 states. [2020-10-28 09:12:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:03,998 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-10-28 09:12:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:12:03,998 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-28 09:12:03,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:04,000 INFO L225 Difference]: With dead ends: 113 [2020-10-28 09:12:04,000 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 09:12:04,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:12:04,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 09:12:04,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-28 09:12:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 09:12:04,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-28 09:12:04,012 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2020-10-28 09:12:04,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:04,013 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-28 09:12:04,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:12:04,013 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-28 09:12:04,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 09:12:04,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:04,014 INFO L422 BasicCegarLoop]: trace histogram [17, 10, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:04,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:12:04,014 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:04,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:04,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2080458272, now seen corresponding path program 12 times [2020-10-28 09:12:04,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:04,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743968093] [2020-10-28 09:12:04,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:04,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:04,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:08,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:09,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:09,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 09:12:09,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:12:09,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:12:09,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:09,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:09,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:12:09,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:09,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:12:09,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:09,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:09,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:09,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:09,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:09,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:09,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:09,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:09,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:09,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:09,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:09,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:09,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:09,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-28 09:12:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:09,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:09,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:09,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:09,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:09,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:09,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:09,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:09,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:09,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:09,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:09,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:09,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 09:12:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:09,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:09,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:09,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:09,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:09,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:09,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:09,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:09,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:09,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:09,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:09,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:09,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-28 09:12:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:09,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:09,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:09,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:09,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:09,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:09,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:09,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:09,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:09,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:09,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:09,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 6 proven. 153 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-28 09:12:09,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743968093] [2020-10-28 09:12:09,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:09,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:12:09,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101052252] [2020-10-28 09:12:09,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:12:09,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:09,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:12:09,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:12:09,374 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 21 states. [2020-10-28 09:12:09,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:09,641 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2020-10-28 09:12:09,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:12:09,641 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-10-28 09:12:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:09,642 INFO L225 Difference]: With dead ends: 114 [2020-10-28 09:12:09,642 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:12:09,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:12:09,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:12:09,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-28 09:12:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 09:12:09,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-28 09:12:09,653 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2020-10-28 09:12:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:09,653 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-28 09:12:09,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:12:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-28 09:12:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:12:09,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:09,654 INFO L422 BasicCegarLoop]: trace histogram [18, 10, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:09,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:12:09,655 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:09,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:09,655 INFO L82 PathProgramCache]: Analyzing trace with hash 218094738, now seen corresponding path program 13 times [2020-10-28 09:12:09,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:09,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846511680] [2020-10-28 09:12:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:09,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:09,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:14,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:14,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:14,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 09:12:14,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:12:14,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:12:14,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:14,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:14,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:12:14,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 09:12:14,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:12:14,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:14,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:14,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:14,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:14,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:14,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:14,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:14,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:14,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:14,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:14,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:14,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:14,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:14,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 09:12:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:14,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:14,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:14,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:14,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:14,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:14,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:14,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:14,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:14,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:14,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:14,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:14,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:12:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:14,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:14,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:14,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:14,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:14,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:14,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:14,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:14,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:14,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:14,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:14,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:14,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:12:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:14,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:14,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:14,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:14,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:14,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:14,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:14,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:14,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-28 09:12:14,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846511680] [2020-10-28 09:12:14,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:14,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:12:14,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858741650] [2020-10-28 09:12:14,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:12:14,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:14,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:12:14,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:12:14,870 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 14 states. [2020-10-28 09:12:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:15,192 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2020-10-28 09:12:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:12:15,192 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2020-10-28 09:12:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:15,194 INFO L225 Difference]: With dead ends: 127 [2020-10-28 09:12:15,194 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 09:12:15,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:12:15,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 09:12:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2020-10-28 09:12:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 09:12:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-28 09:12:15,218 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 66 [2020-10-28 09:12:15,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:15,219 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-28 09:12:15,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:12:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-28 09:12:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:12:15,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:15,220 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:15,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:12:15,221 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:15,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:15,222 INFO L82 PathProgramCache]: Analyzing trace with hash -140446623, now seen corresponding path program 14 times [2020-10-28 09:12:15,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:15,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526131097] [2020-10-28 09:12:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:15,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:15,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:20,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:20,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:20,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 09:12:20,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:12:20,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:12:20,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:20,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:12:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:12:20,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:20,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:20,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:20,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:20,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:20,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:20,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:20,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:20,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:20,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:20,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:20,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:20,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:20,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 09:12:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:20,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:20,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:20,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:20,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:20,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:20,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:20,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:20,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:20,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:20,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:20,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:20,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 09:12:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:20,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:20,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:20,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:20,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:20,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:20,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:20,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:20,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:20,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:20,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 09:12:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:20,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:20,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:20,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:20,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:20,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:20,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:20,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:20,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:20,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:20,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:20,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 6 proven. 171 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-28 09:12:20,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526131097] [2020-10-28 09:12:20,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:20,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:12:20,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893142661] [2020-10-28 09:12:20,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:12:20,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:20,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:12:20,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:12:20,613 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 22 states. [2020-10-28 09:12:20,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:20,902 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2020-10-28 09:12:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:12:20,902 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-10-28 09:12:20,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:20,904 INFO L225 Difference]: With dead ends: 117 [2020-10-28 09:12:20,904 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 09:12:20,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:12:20,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 09:12:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-28 09:12:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 09:12:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-28 09:12:20,915 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2020-10-28 09:12:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:20,915 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-28 09:12:20,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:12:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-28 09:12:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 09:12:20,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:20,916 INFO L422 BasicCegarLoop]: trace histogram [19, 11, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:20,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:12:20,916 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:20,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:20,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1155805843, now seen corresponding path program 15 times [2020-10-28 09:12:20,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:20,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574422896] [2020-10-28 09:12:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:20,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:20,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:25,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:25,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 09:12:25,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:12:25,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:12:25,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:25,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:12:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 09:12:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:12:25,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:26,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:26,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:26,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:26,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:26,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:26,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:26,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:26,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:26,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:26,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:26,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:26,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:26,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:12:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:26,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:26,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:26,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:26,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:26,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:26,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:26,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:26,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:26,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:12:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:26,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:26,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:26,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:26,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:26,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:26,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:26,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:26,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:26,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:26,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:26,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:26,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:12:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:26,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:26,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:26,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:26,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:26,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:26,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:26,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:26,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:26,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:26,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-10-28 09:12:26,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574422896] [2020-10-28 09:12:26,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:26,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:12:26,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734838249] [2020-10-28 09:12:26,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:12:26,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:26,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:12:26,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:12:26,122 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 15 states. [2020-10-28 09:12:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:26,488 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2020-10-28 09:12:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:12:26,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 68 [2020-10-28 09:12:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:26,491 INFO L225 Difference]: With dead ends: 132 [2020-10-28 09:12:26,491 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 09:12:26,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:12:26,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 09:12:26,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2020-10-28 09:12:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:12:26,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-28 09:12:26,512 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-10-28 09:12:26,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:26,513 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-28 09:12:26,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:12:26,513 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-28 09:12:26,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:12:26,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:26,514 INFO L422 BasicCegarLoop]: trace histogram [19, 12, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:26,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:12:26,514 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:26,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:26,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1136173440, now seen corresponding path program 16 times [2020-10-28 09:12:26,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:26,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726915196] [2020-10-28 09:12:26,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:26,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:26,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:31,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:31,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 09:12:31,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:12:31,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:12:31,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:31,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:31,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:12:31,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:31,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:12:31,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:31,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:31,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:31,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:31,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:31,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:31,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:31,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:31,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:31,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:31,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:31,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:31,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:31,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 09:12:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:31,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:31,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:31,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:31,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:31,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:31,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:31,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:31,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:31,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:31,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:31,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:31,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 09:12:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:31,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:31,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:31,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:31,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:31,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:31,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:31,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:31,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:31,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:31,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:31,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:31,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:12:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:31,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:31,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:31,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:31,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:31,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 09:12:31,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:31,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:31,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:31,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:31,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:31,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 6 proven. 190 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-28 09:12:31,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726915196] [2020-10-28 09:12:31,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:31,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:12:31,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831750508] [2020-10-28 09:12:31,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:12:31,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:31,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:12:31,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:12:31,940 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 23 states. [2020-10-28 09:12:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:32,168 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-10-28 09:12:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:12:32,169 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-10-28 09:12:32,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:32,170 INFO L225 Difference]: With dead ends: 123 [2020-10-28 09:12:32,170 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 09:12:32,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:12:32,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 09:12:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-10-28 09:12:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 09:12:32,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-28 09:12:32,188 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2020-10-28 09:12:32,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:32,189 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-28 09:12:32,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:12:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-28 09:12:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 09:12:32,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:32,191 INFO L422 BasicCegarLoop]: trace histogram [20, 12, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:32,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:12:32,192 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:32,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:32,192 INFO L82 PathProgramCache]: Analyzing trace with hash -978069454, now seen corresponding path program 17 times [2020-10-28 09:12:32,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:32,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234309731] [2020-10-28 09:12:32,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:32,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:32,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:37,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:37,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 09:12:37,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:12:37,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:12:37,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:37,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:37,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:12:37,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:37,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:12:37,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:37,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:37,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:37,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:37,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:37,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:37,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:37,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:37,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:37,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:37,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:37,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:37,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:37,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:12:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:37,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:37,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:37,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:37,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:37,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:37,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:37,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:37,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:37,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:37,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:37,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:37,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-28 09:12:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:37,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:37,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:37,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:37,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:37,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:37,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:37,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:37,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:37,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:37,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:37,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:37,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:12:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:37,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:37,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:37,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:37,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:37,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:37,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:37,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:37,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:37,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:37,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:37,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 6 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-28 09:12:37,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234309731] [2020-10-28 09:12:37,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:37,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:12:37,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621674625] [2020-10-28 09:12:37,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:12:37,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:37,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:12:37,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:12:37,650 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 24 states. [2020-10-28 09:12:37,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:37,970 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2020-10-28 09:12:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:12:37,976 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2020-10-28 09:12:37,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:37,977 INFO L225 Difference]: With dead ends: 124 [2020-10-28 09:12:37,977 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 09:12:37,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:12:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 09:12:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-10-28 09:12:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 09:12:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-28 09:12:37,987 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-10-28 09:12:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:37,987 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-28 09:12:37,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:12:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-28 09:12:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 09:12:37,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:37,988 INFO L422 BasicCegarLoop]: trace histogram [21, 12, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:37,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:12:37,989 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash -371813184, now seen corresponding path program 18 times [2020-10-28 09:12:37,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:37,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335589189] [2020-10-28 09:12:37,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:38,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:38,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:43,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:43,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 09:12:43,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:12:43,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:12:43,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:43,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:43,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:12:43,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 09:12:43,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:12:43,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:43,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:43,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:43,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:43,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:43,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:43,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:43,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:43,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:43,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:43,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:43,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:43,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:43,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 09:12:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:43,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:43,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:43,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:43,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:43,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:43,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:43,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:43,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:43,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:43,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:43,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:43,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:12:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:43,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:43,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:43,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:43,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:43,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:43,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:43,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:43,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:43,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:43,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:43,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:43,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 09:12:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:43,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:43,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:43,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:43,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:43,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:43,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:43,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:43,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:43,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:43,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:43,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2020-10-28 09:12:43,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335589189] [2020-10-28 09:12:43,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:43,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:12:43,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486338727] [2020-10-28 09:12:43,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:12:43,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:43,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:12:43,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:12:43,252 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 16 states. [2020-10-28 09:12:43,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:43,572 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2020-10-28 09:12:43,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:12:43,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-10-28 09:12:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:43,575 INFO L225 Difference]: With dead ends: 138 [2020-10-28 09:12:43,575 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 09:12:43,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:12:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 09:12:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 75. [2020-10-28 09:12:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:12:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-28 09:12:43,587 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 71 [2020-10-28 09:12:43,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:43,587 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-28 09:12:43,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:12:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-28 09:12:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 09:12:43,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:43,588 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:43,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:12:43,588 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:43,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:43,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1247723021, now seen corresponding path program 19 times [2020-10-28 09:12:43,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:43,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322313088] [2020-10-28 09:12:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:43,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:43,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:48,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:48,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 09:12:48,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:12:48,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:12:48,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:48,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:48,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:12:48,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:48,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:12:48,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:49,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:49,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:49,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:49,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:49,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:49,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:49,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:49,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:49,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:49,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:49,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:49,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:49,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 09:12:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:49,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:49,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:49,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:49,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:49,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:49,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:49,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:49,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:49,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:49,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:49,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:49,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-28 09:12:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:49,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:49,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:49,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:49,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:49,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:49,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:49,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:49,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:49,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:49,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:49,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:49,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:12:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:49,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:49,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:49,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:49,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:49,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:12:49,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:49,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:49,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:49,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:49,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:49,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 6 proven. 231 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-28 09:12:49,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322313088] [2020-10-28 09:12:49,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:49,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:12:49,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827205885] [2020-10-28 09:12:49,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:12:49,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:49,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:12:49,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:12:49,078 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 25 states. [2020-10-28 09:12:49,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:49,363 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2020-10-28 09:12:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:12:49,363 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2020-10-28 09:12:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:49,364 INFO L225 Difference]: With dead ends: 127 [2020-10-28 09:12:49,364 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 09:12:49,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:12:49,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 09:12:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-10-28 09:12:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:12:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-28 09:12:49,378 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2020-10-28 09:12:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:49,378 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-28 09:12:49,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:12:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-28 09:12:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:12:49,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:49,379 INFO L422 BasicCegarLoop]: trace histogram [22, 13, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:49,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:12:49,380 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:49,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1543967489, now seen corresponding path program 20 times [2020-10-28 09:12:49,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:49,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316894991] [2020-10-28 09:12:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:49,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:49,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:54,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:54,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 09:12:54,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:12:54,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:12:54,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:54,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:54,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:12:54,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:12:54,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:12:54,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:54,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:12:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:54,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:54,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:54,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:12:54,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:54,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:12:54,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:54,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:54,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:54,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:12:54,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:54,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:54,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 09:12:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:54,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:54,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:54,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:54,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:54,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:54,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:54,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:54,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:54,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:54,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:54,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:54,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:12:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:54,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:54,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:54,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:54,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:54,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:54,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:54,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:54,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:54,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:54,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:54,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:54,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-28 09:12:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:54,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:54,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:12:54,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:12:54,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:12:54,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:12:54,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:12:54,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:12:54,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:12:54,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:12:54,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:12:54,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:12:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 6 proven. 253 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-28 09:12:54,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316894991] [2020-10-28 09:12:54,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:12:54,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:12:54,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154081683] [2020-10-28 09:12:54,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:12:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:12:54,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:12:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:12:54,931 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 26 states. [2020-10-28 09:12:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:12:55,209 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2020-10-28 09:12:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:12:55,210 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-10-28 09:12:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:12:55,211 INFO L225 Difference]: With dead ends: 128 [2020-10-28 09:12:55,211 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 09:12:55,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:12:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 09:12:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-10-28 09:12:55,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 09:12:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-28 09:12:55,226 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2020-10-28 09:12:55,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:12:55,226 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-28 09:12:55,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:12:55,226 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-28 09:12:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 09:12:55,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:12:55,227 INFO L422 BasicCegarLoop]: trace histogram [23, 13, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:12:55,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:12:55,227 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:12:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:12:55,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2107939917, now seen corresponding path program 21 times [2020-10-28 09:12:55,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:12:55,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592294708] [2020-10-28 09:12:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:12:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:12:55,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:12:55,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:00,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:00,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 09:13:00,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:00,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:13:00,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:00,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:00,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:13:00,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 09:13:00,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:13:00,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:00,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:00,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:00,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:00,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:00,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:00,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:13:00,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:00,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:00,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:00,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:00,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:00,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:13:00,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 09:13:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:00,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:00,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:00,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:00,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:00,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:13:00,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:00,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:00,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:00,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:00,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:00,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:00,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 09:13:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:00,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:00,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:00,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:00,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:00,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:00,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:00,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:00,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:00,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:00,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:00,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:13:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:00,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:00,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:00,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:00,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:00,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:00,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:00,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:00,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:00,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:00,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:00,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:13:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2020-10-28 09:13:00,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592294708] [2020-10-28 09:13:00,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:00,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:13:00,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702478716] [2020-10-28 09:13:00,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:13:00,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:00,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:13:00,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:13:00,519 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 17 states. [2020-10-28 09:13:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:00,912 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2020-10-28 09:13:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:13:00,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2020-10-28 09:13:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:00,914 INFO L225 Difference]: With dead ends: 144 [2020-10-28 09:13:00,915 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 09:13:00,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:13:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 09:13:00,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2020-10-28 09:13:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 09:13:00,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-28 09:13:00,930 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 74 [2020-10-28 09:13:00,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:00,930 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-28 09:13:00,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:13:00,930 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-28 09:13:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 09:13:00,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:00,931 INFO L422 BasicCegarLoop]: trace histogram [23, 14, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:00,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:13:00,931 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:00,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash 766923104, now seen corresponding path program 22 times [2020-10-28 09:13:00,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:00,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282706202] [2020-10-28 09:13:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:00,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:01,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:05,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:05,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 09:13:05,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:05,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:13:05,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:05,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:05,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:13:05,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:13:05,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:13:05,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:06,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:06,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:06,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:06,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:06,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:06,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:06,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:06,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:06,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:06,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:06,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:06,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:06,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 09:13:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:06,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:06,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:06,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:06,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:06,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:13:06,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:06,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:06,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:06,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:13:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:06,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:06,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:06,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:06,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:06,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:06,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:06,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:06,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:06,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:06,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:06,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:06,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 09:13:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:06,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:06,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:06,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:06,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:06,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:06,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:06,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:06,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:06,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:06,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:06,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 6 proven. 276 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-28 09:13:06,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282706202] [2020-10-28 09:13:06,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:06,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:13:06,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469460927] [2020-10-28 09:13:06,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:13:06,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:06,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:13:06,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:13:06,495 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 27 states. [2020-10-28 09:13:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:06,850 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2020-10-28 09:13:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:13:06,850 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 75 [2020-10-28 09:13:06,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:06,851 INFO L225 Difference]: With dead ends: 131 [2020-10-28 09:13:06,851 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 09:13:06,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:13:06,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 09:13:06,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2020-10-28 09:13:06,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 09:13:06,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-28 09:13:06,863 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2020-10-28 09:13:06,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:06,863 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-28 09:13:06,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:13:06,863 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-28 09:13:06,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 09:13:06,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:06,864 INFO L422 BasicCegarLoop]: trace histogram [24, 14, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:06,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 09:13:06,864 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:06,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:06,865 INFO L82 PathProgramCache]: Analyzing trace with hash 272186770, now seen corresponding path program 23 times [2020-10-28 09:13:06,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:06,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332710488] [2020-10-28 09:13:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:06,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:06,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:11,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:11,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 09:13:11,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:11,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:13:11,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:11,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:11,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:13:11,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 09:13:11,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:13:11,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:12,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:12,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:12,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:12,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:12,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:12,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:12,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:12,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:12,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:12,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:12,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:12,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:12,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 09:13:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:12,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:12,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:12,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:12,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:12,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:12,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:12,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:12,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:12,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:12,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:12,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:12,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:13:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:12,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:12,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:12,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:12,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:12,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:12,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:12,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:12,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:12,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:12,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:12,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:12,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:13:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:12,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:12,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:12,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:12,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:12,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:12,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:12,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:12,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:12,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:12,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:12,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 6 proven. 105 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2020-10-28 09:13:12,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332710488] [2020-10-28 09:13:12,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:12,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:13:12,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659985654] [2020-10-28 09:13:12,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:13:12,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:12,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:13:12,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:13:12,158 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 18 states. [2020-10-28 09:13:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:12,565 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2020-10-28 09:13:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:13:12,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-28 09:13:12,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:12,567 INFO L225 Difference]: With dead ends: 149 [2020-10-28 09:13:12,567 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 09:13:12,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:13:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 09:13:12,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2020-10-28 09:13:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 09:13:12,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-28 09:13:12,580 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-10-28 09:13:12,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:12,580 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-28 09:13:12,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:13:12,580 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-28 09:13:12,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 09:13:12,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:12,581 INFO L422 BasicCegarLoop]: trace histogram [24, 15, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:12,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 09:13:12,582 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:12,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:12,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1536406369, now seen corresponding path program 24 times [2020-10-28 09:13:12,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:12,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912477226] [2020-10-28 09:13:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:12,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:12,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:17,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:17,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 09:13:17,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:17,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:13:17,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:17,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:17,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:13:17,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:13:17,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:13:17,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:18,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:18,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:18,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:18,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:18,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:18,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:13:18,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:18,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:18,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:18,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:18,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:18,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-28 09:13:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:18,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:18,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:18,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:18,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:18,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:18,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:18,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:18,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:18,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:18,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:18,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:18,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:13:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:18,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:18,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:18,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:18,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:18,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:18,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:18,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:18,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:18,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:18,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:18,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:18,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 09:13:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:18,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:18,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:18,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:18,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:18,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:18,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:18,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:18,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:18,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:18,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:18,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 6 proven. 300 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-28 09:13:18,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912477226] [2020-10-28 09:13:18,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:18,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:13:18,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034491328] [2020-10-28 09:13:18,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:13:18,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:18,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:13:18,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:13:18,177 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 28 states. [2020-10-28 09:13:18,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:18,512 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2020-10-28 09:13:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:13:18,512 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 77 [2020-10-28 09:13:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:18,513 INFO L225 Difference]: With dead ends: 134 [2020-10-28 09:13:18,513 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 09:13:18,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:13:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 09:13:18,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-10-28 09:13:18,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 09:13:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-28 09:13:18,524 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2020-10-28 09:13:18,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:18,524 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-28 09:13:18,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:13:18,525 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-28 09:13:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 09:13:18,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:18,525 INFO L422 BasicCegarLoop]: trace histogram [25, 15, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:18,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 09:13:18,526 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:18,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:18,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1458808045, now seen corresponding path program 25 times [2020-10-28 09:13:18,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:18,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065722261] [2020-10-28 09:13:18,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:18,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:18,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:23,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:23,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 09:13:23,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:23,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:13:23,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:23,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:23,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:13:23,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:13:23,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:13:23,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:24,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:24,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:24,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:24,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:24,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:24,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:13:24,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:24,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:24,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:24,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:24,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:24,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:24,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:13:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:24,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:24,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:24,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:24,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:24,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:24,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:24,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:24,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:24,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:24,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 09:13:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:24,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:24,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:24,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:24,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:24,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:24,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:24,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:24,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:24,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:24,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:24,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:24,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 09:13:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:24,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:24,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:24,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:24,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:24,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:24,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:24,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:24,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:24,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:24,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:24,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 6 proven. 325 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-28 09:13:24,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065722261] [2020-10-28 09:13:24,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:24,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:13:24,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685766357] [2020-10-28 09:13:24,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:13:24,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:24,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:13:24,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:13:24,137 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 29 states. [2020-10-28 09:13:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:24,564 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2020-10-28 09:13:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:13:24,565 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 78 [2020-10-28 09:13:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:24,566 INFO L225 Difference]: With dead ends: 138 [2020-10-28 09:13:24,566 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 09:13:24,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:13:24,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 09:13:24,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-10-28 09:13:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 09:13:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-28 09:13:24,591 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-10-28 09:13:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:24,592 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-28 09:13:24,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:13:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-28 09:13:24,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 09:13:24,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:24,596 INFO L422 BasicCegarLoop]: trace histogram [26, 15, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:24,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 09:13:24,597 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:24,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:24,597 INFO L82 PathProgramCache]: Analyzing trace with hash 178825633, now seen corresponding path program 26 times [2020-10-28 09:13:24,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:24,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651494102] [2020-10-28 09:13:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:24,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:24,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:29,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:29,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 09:13:29,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:29,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:13:29,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:29,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:29,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:13:29,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 09:13:29,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:13:29,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:29,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:29,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:29,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:29,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:29,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:29,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:13:29,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:29,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:29,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:29,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:29,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:29,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:29,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-28 09:13:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:29,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:29,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:29,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:29,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:29,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:29,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:29,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:29,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:29,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:29,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:29,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:29,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:13:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:29,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:29,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:29,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:29,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:29,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:29,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:29,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:29,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:29,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:29,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-28 09:13:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:29,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:29,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:29,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:29,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:29,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:13:29,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:29,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:29,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:29,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:29,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:29,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 6 proven. 120 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-28 09:13:29,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651494102] [2020-10-28 09:13:29,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:29,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:13:29,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229825316] [2020-10-28 09:13:29,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:13:29,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:29,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:13:29,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:13:29,920 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 19 states. [2020-10-28 09:13:30,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:30,382 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2020-10-28 09:13:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:13:30,383 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-10-28 09:13:30,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:30,384 INFO L225 Difference]: With dead ends: 155 [2020-10-28 09:13:30,384 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 09:13:30,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:13:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 09:13:30,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 83. [2020-10-28 09:13:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:13:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-28 09:13:30,396 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-10-28 09:13:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:30,397 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-28 09:13:30,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:13:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-28 09:13:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 09:13:30,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:30,398 INFO L422 BasicCegarLoop]: trace histogram [26, 16, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:30,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 09:13:30,398 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:30,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:30,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1357788878, now seen corresponding path program 27 times [2020-10-28 09:13:30,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:30,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366515934] [2020-10-28 09:13:30,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:30,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:30,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:35,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:35,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 09:13:35,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:35,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 09:13:35,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:35,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:35,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:13:35,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:13:35,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:13:35,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:36,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:36,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:36,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:36,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:36,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:36,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 09:13:36,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:36,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:36,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:36,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:36,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:36,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:36,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:13:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:36,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:36,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:36,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:36,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:36,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:36,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:36,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:36,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:36,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:36,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:36,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:36,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-28 09:13:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:36,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:36,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:36,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:36,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:36,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:36,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:36,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:36,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:36,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:36,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:36,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:36,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 09:13:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:36,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:36,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:36,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:36,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:36,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:36,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:36,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:36,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:36,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:36,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:36,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 6 proven. 351 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2020-10-28 09:13:36,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366515934] [2020-10-28 09:13:36,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:36,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:13:36,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339209108] [2020-10-28 09:13:36,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:13:36,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:36,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:13:36,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:13:36,126 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 30 states. [2020-10-28 09:13:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:36,405 INFO L93 Difference]: Finished difference Result 141 states and 147 transitions. [2020-10-28 09:13:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:13:36,406 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 80 [2020-10-28 09:13:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:36,407 INFO L225 Difference]: With dead ends: 141 [2020-10-28 09:13:36,407 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 09:13:36,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:13:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 09:13:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2020-10-28 09:13:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:13:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-28 09:13:36,419 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 80 [2020-10-28 09:13:36,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:36,419 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-28 09:13:36,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:13:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-28 09:13:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 09:13:36,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:36,420 INFO L422 BasicCegarLoop]: trace histogram [27, 16, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:36,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 09:13:36,420 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:36,420 INFO L82 PathProgramCache]: Analyzing trace with hash 450145344, now seen corresponding path program 28 times [2020-10-28 09:13:36,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:36,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6348780] [2020-10-28 09:13:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:36,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:36,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:41,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:41,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 09:13:41,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:41,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:13:41,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:41,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:41,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:13:41,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 09:13:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:13:41,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:41,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:41,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:41,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:41,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:41,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:41,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:13:41,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:41,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:41,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:41,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:41,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:41,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:41,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 09:13:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:41,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:41,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:41,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:41,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:41,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:41,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:41,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:41,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:41,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:41,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:41,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:41,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:13:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:41,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:41,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:41,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:41,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:41,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:41,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:41,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:41,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:41,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:41,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:41,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:41,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-28 09:13:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:41,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:41,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:41,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:41,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:41,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:41,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:41,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:41,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2020-10-28 09:13:41,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6348780] [2020-10-28 09:13:41,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:41,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:13:41,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719578134] [2020-10-28 09:13:41,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:13:41,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:41,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:13:41,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:13:41,751 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 20 states. [2020-10-28 09:13:42,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:42,256 INFO L93 Difference]: Finished difference Result 160 states and 177 transitions. [2020-10-28 09:13:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:13:42,256 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-10-28 09:13:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:42,258 INFO L225 Difference]: With dead ends: 160 [2020-10-28 09:13:42,258 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 09:13:42,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:13:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 09:13:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 85. [2020-10-28 09:13:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 09:13:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-28 09:13:42,274 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2020-10-28 09:13:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:42,274 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-28 09:13:42,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:13:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-28 09:13:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 09:13:42,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:42,275 INFO L422 BasicCegarLoop]: trace histogram [27, 17, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:42,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 09:13:42,275 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:42,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:42,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1536812429, now seen corresponding path program 29 times [2020-10-28 09:13:42,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:42,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798523853] [2020-10-28 09:13:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:42,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:42,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:47,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:47,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 09:13:47,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:47,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:13:47,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:47,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:13:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:13:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:13:47,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:48,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:48,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:48,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:48,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:48,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:48,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:13:48,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:48,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:48,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:48,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:48,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:13:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:48,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:48,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:48,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:48,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:48,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:48,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:48,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:48,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:48,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:48,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:48,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:48,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 09:13:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:48,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:48,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:48,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:48,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:48,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:48,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:48,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:48,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:48,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:48,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:48,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:48,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 09:13:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:48,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:48,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:48,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:48,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:48,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:48,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:48,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:48,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:48,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:48,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:48,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-28 09:13:48,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798523853] [2020-10-28 09:13:48,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:48,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:13:48,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795121554] [2020-10-28 09:13:48,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:13:48,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:48,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:13:48,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:13:48,031 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 31 states. [2020-10-28 09:13:48,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:48,435 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2020-10-28 09:13:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:13:48,435 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 82 [2020-10-28 09:13:48,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:48,436 INFO L225 Difference]: With dead ends: 144 [2020-10-28 09:13:48,436 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 09:13:48,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:13:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 09:13:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2020-10-28 09:13:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 09:13:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-28 09:13:48,450 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2020-10-28 09:13:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:48,450 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-28 09:13:48,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:13:48,450 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-28 09:13:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 09:13:48,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:48,451 INFO L422 BasicCegarLoop]: trace histogram [28, 17, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:48,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 09:13:48,451 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:48,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:48,452 INFO L82 PathProgramCache]: Analyzing trace with hash 721187329, now seen corresponding path program 30 times [2020-10-28 09:13:48,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:48,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740583437] [2020-10-28 09:13:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:48,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:48,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:53,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:53,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:13:53,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:53,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:13:53,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:53,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:53,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:13:53,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:13:53,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:13:53,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:54,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:13:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:54,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:54,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:54,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:13:54,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:54,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:13:54,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:54,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:54,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:54,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:13:54,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:54,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:54,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 09:13:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:54,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:54,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:54,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:54,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:54,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:54,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:54,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:54,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:54,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:54,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:54,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:54,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:13:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:54,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:54,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:54,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:54,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:54,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:54,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:54,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:54,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:54,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:54,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:54,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:54,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-28 09:13:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:54,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:54,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:54,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:13:54,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:13:54,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:13:54,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:54,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:54,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:13:54,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:13:54,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:13:54,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:13:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 6 proven. 406 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-28 09:13:54,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740583437] [2020-10-28 09:13:54,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:13:54,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:13:54,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816800124] [2020-10-28 09:13:54,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:13:54,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:13:54,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:13:54,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:13:54,303 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 32 states. [2020-10-28 09:13:54,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:13:54,747 INFO L93 Difference]: Finished difference Result 145 states and 151 transitions. [2020-10-28 09:13:54,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:13:54,748 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 83 [2020-10-28 09:13:54,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:13:54,749 INFO L225 Difference]: With dead ends: 145 [2020-10-28 09:13:54,749 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 09:13:54,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:13:54,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 09:13:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2020-10-28 09:13:54,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 09:13:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-28 09:13:54,762 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2020-10-28 09:13:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:13:54,763 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-28 09:13:54,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:13:54,763 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-28 09:13:54,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 09:13:54,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:13:54,764 INFO L422 BasicCegarLoop]: trace histogram [29, 17, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:13:54,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 09:13:54,764 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:13:54,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:13:54,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1999703091, now seen corresponding path program 31 times [2020-10-28 09:13:54,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:13:54,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843879404] [2020-10-28 09:13:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:13:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:13:54,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:54,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:13:59,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:13:59,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 09:13:59,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:13:59,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:13:59,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:13:59,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:13:59,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:13:59,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 09:13:59,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:13:59,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:00,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:14:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:00,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:00,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:00,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:14:00,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:00,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:14:00,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:00,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:00,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:00,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:14:00,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:00,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:00,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:14:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:00,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:00,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:00,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:00,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:00,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:00,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:00,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:00,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:00,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:14:00,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:00,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:00,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 09:14:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:00,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:00,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:00,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:00,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:00,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:14:00,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:00,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:00,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:00,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:14:00,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:00,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:14:00,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 09:14:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:00,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:00,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:00,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:14:00,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:14:00,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:14:00,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:00,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:14:00,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:14:00,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:14:00,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:14:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 6 proven. 153 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-28 09:14:00,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843879404] [2020-10-28 09:14:00,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:14:00,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:14:00,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020884587] [2020-10-28 09:14:00,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:14:00,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:14:00,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:14:00,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:14:00,225 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 21 states. [2020-10-28 09:14:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:14:00,752 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2020-10-28 09:14:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:14:00,753 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-10-28 09:14:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:14:00,754 INFO L225 Difference]: With dead ends: 166 [2020-10-28 09:14:00,754 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 09:14:00,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:14:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 09:14:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 88. [2020-10-28 09:14:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 09:14:00,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-28 09:14:00,771 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-10-28 09:14:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:14:00,772 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-28 09:14:00,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:14:00,772 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-28 09:14:00,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:14:00,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:14:00,773 INFO L422 BasicCegarLoop]: trace histogram [29, 18, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:14:00,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 09:14:00,773 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:14:00,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:14:00,773 INFO L82 PathProgramCache]: Analyzing trace with hash -745162528, now seen corresponding path program 32 times [2020-10-28 09:14:00,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:14:00,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327336530] [2020-10-28 09:14:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:14:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:14:00,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:00,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:14:05,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:14:05,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 09:14:05,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:14:05,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 09:14:05,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:14:05,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:14:05,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:14:05,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:14:05,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:14:05,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0