/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=SHALLOWEST --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-cav19/array_init_var_plus_ind3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 18:58:27,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 18:58:27,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 18:58:27,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 18:58:27,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 18:58:27,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 18:58:27,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 18:58:27,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 18:58:27,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 18:58:27,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 18:58:27,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 18:58:27,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 18:58:27,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 18:58:27,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 18:58:27,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 18:58:27,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 18:58:27,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 18:58:27,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 18:58:27,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 18:58:27,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 18:58:27,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 18:58:27,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 18:58:27,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 18:58:27,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 18:58:27,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 18:58:27,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 18:58:27,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 18:58:27,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 18:58:27,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 18:58:27,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 18:58:27,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 18:58:27,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 18:58:27,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 18:58:27,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 18:58:27,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 18:58:27,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 18:58:27,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 18:58:27,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 18:58:27,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 18:58:27,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 18:58:27,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 18:58:27,322 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 [2020-10-26 18:58:27,374 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 18:58:27,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 18:58:27,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 18:58:27,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 18:58:27,379 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 18:58:27,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 18:58:27,379 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 18:58:27,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 18:58:27,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 18:58:27,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 18:58:27,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 18:58:27,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 18:58:27,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 18:58:27,381 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 18:58:27,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 18:58:27,382 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 18:58:27,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 18:58:27,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 18:58:27,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 18:58:27,383 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 18:58:27,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 18:58:27,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 18:58:27,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 18:58:27,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 18:58:27,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 18:58:27,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 18:58:27,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 18:58:27,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 18:58:27,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 18:58:27,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 18:58:27,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 18:58:27,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 18:58:27,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 18:58:27,829 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 18:58:27,830 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 18:58:27,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind3.c [2020-10-26 18:58:27,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a53867d54/08ef196cc1524ae5a110324b2cc7c371/FLAG390c9d21f [2020-10-26 18:58:28,624 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 18:58:28,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind3.c [2020-10-26 18:58:28,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a53867d54/08ef196cc1524ae5a110324b2cc7c371/FLAG390c9d21f [2020-10-26 18:58:28,979 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a53867d54/08ef196cc1524ae5a110324b2cc7c371 [2020-10-26 18:58:28,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 18:58:28,994 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 18:58:28,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 18:58:28,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 18:58:29,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 18:58:29,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 06:58:28" (1/1) ... [2020-10-26 18:58:29,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a21b146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29, skipping insertion in model container [2020-10-26 18:58:29,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 06:58:28" (1/1) ... [2020-10-26 18:58:29,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 18:58:29,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 18:58:29,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 18:58:29,242 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 18:58:29,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 18:58:29,288 INFO L208 MainTranslator]: Completed translation [2020-10-26 18:58:29,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29 WrapperNode [2020-10-26 18:58:29,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 18:58:29,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 18:58:29,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 18:58:29,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 18:58:29,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 18:58:29,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 18:58:29,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 18:58:29,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 18:58:29,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (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 [2020-10-26 18:58:29,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 18:58:29,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 18:58:29,412 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 18:58:29,413 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 18:58:29,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 18:58:29,413 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 18:58:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 18:58:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 18:58:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 18:58:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 18:58:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 18:58:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 18:58:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 18:58:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 18:58:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 18:58:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 18:58:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 18:58:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 18:58:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 18:58:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 18:58:29,726 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 18:58:29,727 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 18:58:29,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 06:58:29 BoogieIcfgContainer [2020-10-26 18:58:29,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 18:58:29,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 18:58:29,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 18:58:29,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 18:58:29,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 06:58:28" (1/3) ... [2020-10-26 18:58:29,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d5b969c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 06:58:29, skipping insertion in model container [2020-10-26 18:58:29,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (2/3) ... [2020-10-26 18:58:29,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d5b969c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 06:58:29, skipping insertion in model container [2020-10-26 18:58:29,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 06:58:29" (3/3) ... [2020-10-26 18:58:29,767 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2020-10-26 18:58:29,798 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 18:58:29,807 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 18:58:29,833 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 18:58:29,890 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 18:58:29,890 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 18:58:29,891 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 18:58:29,891 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 18:58:29,891 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 18:58:29,891 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 18:58:29,891 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 18:58:29,891 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 18:58:29,920 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-26 18:58:29,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-26 18:58:29,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:29,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:29,933 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:29,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1582220556, now seen corresponding path program 1 times [2020-10-26 18:58:29,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:29,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299065701] [2020-10-26 18:58:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:30,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:30,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:30,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:30,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 18:58:30,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:30,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-26 18:58:30,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:30,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 18:58:30,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:30,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 18:58:30,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 18:58:31,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:31,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:31,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 18:58:31,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:31,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:31,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:31,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:58:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:31,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299065701] [2020-10-26 18:58:31,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 18:58:31,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 18:58:31,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088521715] [2020-10-26 18:58:31,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 18:58:31,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:31,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 18:58:31,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 18:58:31,139 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-10-26 18:58:31,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:31,436 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2020-10-26 18:58:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 18:58:31,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-26 18:58:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:31,449 INFO L225 Difference]: With dead ends: 57 [2020-10-26 18:58:31,450 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 18:58:31,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 18:58:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 18:58:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2020-10-26 18:58:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-26 18:58:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-26 18:58:31,523 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2020-10-26 18:58:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:31,524 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-26 18:58:31,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 18:58:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-26 18:58:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 18:58:31,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:31,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:31,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 18:58:31,528 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2112687446, now seen corresponding path program 1 times [2020-10-26 18:58:31,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:31,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747389448] [2020-10-26 18:58:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 18:58:31,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:31,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 18:58:31,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 18:58:31,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:31,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 18:58:31,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:58:31,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:31,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:31,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 18:58:31,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:31,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:31,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:31,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:31,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747389448] [2020-10-26 18:58:31,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 18:58:31,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 18:58:31,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109662176] [2020-10-26 18:58:31,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 18:58:31,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:31,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 18:58:31,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 18:58:31,794 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-10-26 18:58:31,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:31,920 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-10-26 18:58:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 18:58:31,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-26 18:58:31,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:31,922 INFO L225 Difference]: With dead ends: 37 [2020-10-26 18:58:31,922 INFO L226 Difference]: Without dead ends: 24 [2020-10-26 18:58:31,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 18:58:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-26 18:58:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-26 18:58:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-26 18:58:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-26 18:58:31,932 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-10-26 18:58:31,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:31,932 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-26 18:58:31,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 18:58:31,932 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-26 18:58:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 18:58:31,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:31,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:31,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 18:58:31,934 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:31,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:31,934 INFO L82 PathProgramCache]: Analyzing trace with hash 996586641, now seen corresponding path program 1 times [2020-10-26 18:58:31,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:31,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434252141] [2020-10-26 18:58:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:32,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 18:58:32,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:32,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-26 18:58:32,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:32,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 18:58:32,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:32,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 18:58:32,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:32,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:32,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:32,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:32,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:32,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 18:58:32,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:32,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:32,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:32,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:32,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:32,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434252141] [2020-10-26 18:58:32,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:32,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 18:58:32,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222980290] [2020-10-26 18:58:32,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 18:58:32,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:32,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 18:58:32,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 18:58:32,296 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-26 18:58:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:32,476 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-26 18:58:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 18:58:32,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-26 18:58:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:32,478 INFO L225 Difference]: With dead ends: 44 [2020-10-26 18:58:32,478 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 18:58:32,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 18:58:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 18:58:32,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-10-26 18:58:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 18:58:32,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-26 18:58:32,487 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-10-26 18:58:32,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:32,488 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-26 18:58:32,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 18:58:32,488 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-26 18:58:32,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 18:58:32,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:32,489 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:32,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 18:58:32,490 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:32,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:32,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1207497669, now seen corresponding path program 1 times [2020-10-26 18:58:32,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:32,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416774987] [2020-10-26 18:58:32,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:32,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:32,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 18:58:32,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:32,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-26 18:58:32,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:32,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 18:58:32,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:32,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 18:58:32,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:32,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:32,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:32,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:32,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:32,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:58:32,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:32,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:32,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:32,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:32,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:32,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416774987] [2020-10-26 18:58:32,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:32,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 18:58:32,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299331421] [2020-10-26 18:58:32,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 18:58:32,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:32,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 18:58:32,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 18:58:32,665 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-26 18:58:32,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:32,756 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-26 18:58:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 18:58:32,757 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-26 18:58:32,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:32,758 INFO L225 Difference]: With dead ends: 40 [2020-10-26 18:58:32,758 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 18:58:32,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 18:58:32,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 18:58:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-26 18:58:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-26 18:58:32,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-26 18:58:32,766 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-10-26 18:58:32,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:32,766 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-26 18:58:32,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 18:58:32,766 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-26 18:58:32,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 18:58:32,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:32,767 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:32,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 18:58:32,768 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:32,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:32,768 INFO L82 PathProgramCache]: Analyzing trace with hash 533781228, now seen corresponding path program 2 times [2020-10-26 18:58:32,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:32,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953367415] [2020-10-26 18:58:32,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:32,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 18:58:33,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:33,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-26 18:58:33,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:58:33,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:33,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 18:58:33,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:33,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:33,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:33,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:33,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 18:58:33,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:33,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:33,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:33,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:33,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953367415] [2020-10-26 18:58:33,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:33,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 18:58:33,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935350131] [2020-10-26 18:58:33,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 18:58:33,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:33,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 18:58:33,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 18:58:33,128 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-26 18:58:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:33,326 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-26 18:58:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 18:58:33,328 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-26 18:58:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:33,329 INFO L225 Difference]: With dead ends: 47 [2020-10-26 18:58:33,329 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 18:58:33,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 18:58:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 18:58:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-10-26 18:58:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 18:58:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-26 18:58:33,342 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-10-26 18:58:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:33,343 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-26 18:58:33,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 18:58:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-26 18:58:33,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 18:58:33,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:33,346 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:33,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 18:58:33,346 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:33,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:33,347 INFO L82 PathProgramCache]: Analyzing trace with hash -254568246, now seen corresponding path program 2 times [2020-10-26 18:58:33,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:33,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315269583] [2020-10-26 18:58:33,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:33,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 18:58:33,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:33,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 18:58:33,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:58:33,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:33,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 18:58:33,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:33,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:33,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:33,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:33,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 18:58:33,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:33,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:33,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:33,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:33,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315269583] [2020-10-26 18:58:33,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:33,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 18:58:33,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030435068] [2020-10-26 18:58:33,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 18:58:33,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:33,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 18:58:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 18:58:33,603 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-10-26 18:58:33,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:33,706 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-26 18:58:33,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 18:58:33,707 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-26 18:58:33,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:33,708 INFO L225 Difference]: With dead ends: 43 [2020-10-26 18:58:33,708 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 18:58:33,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-26 18:58:33,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 18:58:33,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-26 18:58:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 18:58:33,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-26 18:58:33,715 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-10-26 18:58:33,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:33,715 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-26 18:58:33,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 18:58:33,716 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-26 18:58:33,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 18:58:33,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:33,716 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:33,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 18:58:33,717 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:33,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:33,717 INFO L82 PathProgramCache]: Analyzing trace with hash -57257295, now seen corresponding path program 3 times [2020-10-26 18:58:33,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:33,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222880290] [2020-10-26 18:58:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:34,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:34,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 18:58:34,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:34,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-26 18:58:34,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:34,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 18:58:34,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:34,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 18:58:34,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:34,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:34,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:34,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:34,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:34,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:34,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 18:58:34,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:34,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:34,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222880290] [2020-10-26 18:58:34,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:34,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 18:58:34,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631800997] [2020-10-26 18:58:34,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 18:58:34,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:34,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 18:58:34,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 18:58:34,268 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2020-10-26 18:58:34,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:34,460 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-26 18:58:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 18:58:34,461 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-26 18:58:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:34,462 INFO L225 Difference]: With dead ends: 50 [2020-10-26 18:58:34,462 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 18:58:34,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 18:58:34,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 18:58:34,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-10-26 18:58:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 18:58:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-26 18:58:34,470 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2020-10-26 18:58:34,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:34,470 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-26 18:58:34,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 18:58:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-26 18:58:34,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 18:58:34,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:34,471 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:34,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 18:58:34,472 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:34,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:34,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1396893275, now seen corresponding path program 3 times [2020-10-26 18:58:34,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:34,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878373983] [2020-10-26 18:58:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:34,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:34,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:34,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 18:58:34,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:34,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-26 18:58:34,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:34,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 18:58:34,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:34,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 18:58:34,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:34,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:34,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:34,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:34,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:34,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:34,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:34,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:34,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:34,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:34,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:34,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:34,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878373983] [2020-10-26 18:58:34,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:34,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 18:58:34,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129873587] [2020-10-26 18:58:34,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 18:58:34,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:34,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 18:58:34,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 18:58:34,682 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2020-10-26 18:58:34,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:34,822 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-26 18:58:34,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 18:58:34,823 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-26 18:58:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:34,823 INFO L225 Difference]: With dead ends: 46 [2020-10-26 18:58:34,824 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 18:58:34,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 18:58:34,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 18:58:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-26 18:58:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 18:58:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-26 18:58:34,830 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2020-10-26 18:58:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:34,831 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-26 18:58:34,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 18:58:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-26 18:58:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 18:58:34,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:34,832 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:34,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 18:58:34,832 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:34,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1680017612, now seen corresponding path program 4 times [2020-10-26 18:58:34,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:34,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022388981] [2020-10-26 18:58:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:34,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:34,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:35,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:35,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 18:58:35,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:35,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-10-26 18:58:35,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:35,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 18:58:35,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:35,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 18:58:35,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:35,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:35,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:35,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:35,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:35,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:35,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 18:58:35,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:35,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:35,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:35,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:35,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:58:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:35,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022388981] [2020-10-26 18:58:35,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:35,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 18:58:35,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397275178] [2020-10-26 18:58:35,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 18:58:35,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:35,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 18:58:35,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 18:58:35,460 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-10-26 18:58:35,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:35,750 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-10-26 18:58:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 18:58:35,751 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-26 18:58:35,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:35,753 INFO L225 Difference]: With dead ends: 53 [2020-10-26 18:58:35,753 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 18:58:35,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-26 18:58:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 18:58:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-10-26 18:58:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 18:58:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-26 18:58:35,770 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-10-26 18:58:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:35,770 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-26 18:58:35,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 18:58:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-26 18:58:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 18:58:35,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:35,776 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:35,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 18:58:35,777 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:35,777 INFO L82 PathProgramCache]: Analyzing trace with hash 919021290, now seen corresponding path program 4 times [2020-10-26 18:58:35,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:35,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125382592] [2020-10-26 18:58:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:35,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:35,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:35,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 18:58:35,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:35,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-26 18:58:35,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:35,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 18:58:35,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:35,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 18:58:35,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:36,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:36,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:36,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:36,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:36,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:36,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 18:58:36,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:36,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:36,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:36,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:36,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:36,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125382592] [2020-10-26 18:58:36,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:36,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 18:58:36,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228928189] [2020-10-26 18:58:36,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 18:58:36,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:36,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 18:58:36,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 18:58:36,078 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 9 states. [2020-10-26 18:58:36,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:36,197 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-10-26 18:58:36,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 18:58:36,198 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-26 18:58:36,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:36,198 INFO L225 Difference]: With dead ends: 49 [2020-10-26 18:58:36,199 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 18:58:36,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 18:58:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 18:58:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-26 18:58:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 18:58:36,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-26 18:58:36,213 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 27 [2020-10-26 18:58:36,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:36,213 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-26 18:58:36,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 18:58:36,213 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-26 18:58:36,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 18:58:36,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:36,216 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:36,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 18:58:36,217 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:36,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:36,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1814112047, now seen corresponding path program 5 times [2020-10-26 18:58:36,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:36,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426492160] [2020-10-26 18:58:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:36,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:36,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:37,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:37,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 18:58:37,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:37,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1041 [2020-10-26 18:58:37,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:37,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 18:58:37,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:37,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 18:58:37,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:37,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:37,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:37,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:37,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:37,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:37,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 18:58:37,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:37,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:37,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426492160] [2020-10-26 18:58:37,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:37,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 18:58:37,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289462929] [2020-10-26 18:58:37,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 18:58:37,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:37,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 18:58:37,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 18:58:37,438 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 10 states. [2020-10-26 18:58:37,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:37,717 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-26 18:58:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 18:58:37,718 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-26 18:58:37,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:37,719 INFO L225 Difference]: With dead ends: 56 [2020-10-26 18:58:37,719 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 18:58:37,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-26 18:58:37,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 18:58:37,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2020-10-26 18:58:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 18:58:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-26 18:58:37,727 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 29 [2020-10-26 18:58:37,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:37,727 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-26 18:58:37,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 18:58:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-26 18:58:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 18:58:37,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:37,728 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:37,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 18:58:37,729 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:37,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:37,729 INFO L82 PathProgramCache]: Analyzing trace with hash -24815739, now seen corresponding path program 5 times [2020-10-26 18:58:37,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:37,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165482483] [2020-10-26 18:58:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:37,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:38,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 18:58:38,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:38,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-26 18:58:38,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:38,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 18:58:38,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:38,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 18:58:38,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:38,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:38,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:38,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:38,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:38,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:38,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 18:58:38,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:38,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:38,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:38,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:38,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:38,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165482483] [2020-10-26 18:58:38,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:38,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 18:58:38,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145523972] [2020-10-26 18:58:38,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 18:58:38,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:38,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 18:58:38,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-26 18:58:38,476 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 16 states. [2020-10-26 18:58:38,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:38,928 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-10-26 18:58:38,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 18:58:38,928 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-10-26 18:58:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:38,929 INFO L225 Difference]: With dead ends: 54 [2020-10-26 18:58:38,930 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 18:58:38,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-26 18:58:38,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 18:58:38,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-10-26 18:58:38,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 18:58:38,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-26 18:58:38,938 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 30 [2020-10-26 18:58:38,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:38,938 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-26 18:58:38,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 18:58:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-26 18:58:38,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 18:58:38,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:38,940 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:38,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 18:58:38,940 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:38,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:38,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1691569836, now seen corresponding path program 6 times [2020-10-26 18:58:38,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:38,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554276430] [2020-10-26 18:58:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:38,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:39,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:40,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:40,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 18:58:40,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:40,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1387 [2020-10-26 18:58:40,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:40,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 18:58:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:40,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 18:58:40,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:58:40,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:40,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:40,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:40,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:40,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:40,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 18:58:40,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:40,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:40,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:40,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:40,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:58:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:40,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554276430] [2020-10-26 18:58:40,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:40,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 18:58:40,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088932586] [2020-10-26 18:58:40,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 18:58:40,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:40,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 18:58:40,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-26 18:58:40,543 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 11 states. [2020-10-26 18:58:40,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:40,874 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-26 18:58:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 18:58:40,875 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-26 18:58:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:40,878 INFO L225 Difference]: With dead ends: 70 [2020-10-26 18:58:40,878 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 18:58:40,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-26 18:58:40,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 18:58:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-26 18:58:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 18:58:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-26 18:58:40,888 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 32 [2020-10-26 18:58:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:40,888 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-26 18:58:40,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 18:58:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-26 18:58:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 18:58:40,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:40,889 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:40,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 18:58:40,890 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:40,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:40,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1277140234, now seen corresponding path program 6 times [2020-10-26 18:58:40,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:40,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771087930] [2020-10-26 18:58:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:40,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:41,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:41,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 18:58:41,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:41,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-26 18:58:41,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:41,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 18:58:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:41,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 18:58:41,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:41,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:41,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:41,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:41,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:41,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:41,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:41,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:41,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:41,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:41,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:41,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:41,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771087930] [2020-10-26 18:58:41,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:41,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 18:58:41,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767718542] [2020-10-26 18:58:41,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 18:58:41,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:41,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 18:58:41,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-26 18:58:41,854 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 17 states. [2020-10-26 18:58:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:42,435 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-26 18:58:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 18:58:42,436 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-26 18:58:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:42,437 INFO L225 Difference]: With dead ends: 70 [2020-10-26 18:58:42,437 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 18:58:42,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-10-26 18:58:42,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 18:58:42,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2020-10-26 18:58:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 18:58:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-26 18:58:42,446 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 33 [2020-10-26 18:58:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:42,446 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-26 18:58:42,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 18:58:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-26 18:58:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 18:58:42,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:42,447 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:42,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 18:58:42,447 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:42,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:42,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1259190543, now seen corresponding path program 7 times [2020-10-26 18:58:42,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:42,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062390777] [2020-10-26 18:58:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:42,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:42,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:42,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:43,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:44,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:44,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 18:58:44,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:58:44,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2294 [2020-10-26 18:58:44,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:44,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 18:58:44,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:44,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 18:58:44,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:44,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:44,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:44,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:44,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:44,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:44,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 18:58:44,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:44,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:44,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:44,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:44,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:44,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062390777] [2020-10-26 18:58:44,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:44,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 18:58:44,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203535517] [2020-10-26 18:58:44,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 18:58:44,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:44,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 18:58:44,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-26 18:58:44,925 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 12 states. [2020-10-26 18:58:45,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:45,323 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2020-10-26 18:58:45,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 18:58:45,324 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-26 18:58:45,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:45,325 INFO L225 Difference]: With dead ends: 80 [2020-10-26 18:58:45,325 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 18:58:45,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-26 18:58:45,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 18:58:45,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-10-26 18:58:45,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 18:58:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-26 18:58:45,335 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 35 [2020-10-26 18:58:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:45,335 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-26 18:58:45,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 18:58:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-26 18:58:45,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 18:58:45,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:45,336 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:45,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 18:58:45,336 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:45,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2118299, now seen corresponding path program 7 times [2020-10-26 18:58:45,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:45,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684324420] [2020-10-26 18:58:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:45,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:45,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:46,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:46,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 18:58:46,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:46,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 845 [2020-10-26 18:58:46,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:46,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 18:58:46,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:46,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 18:58:46,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:46,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:46,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:46,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:46,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:46,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:46,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 18:58:46,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:46,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:46,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:46,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:46,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:46,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684324420] [2020-10-26 18:58:46,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:46,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 18:58:46,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788290766] [2020-10-26 18:58:46,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 18:58:46,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:46,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 18:58:46,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-10-26 18:58:46,834 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 20 states. [2020-10-26 18:58:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:47,696 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-10-26 18:58:47,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 18:58:47,697 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-10-26 18:58:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:47,698 INFO L225 Difference]: With dead ends: 82 [2020-10-26 18:58:47,699 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 18:58:47,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2020-10-26 18:58:47,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 18:58:47,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2020-10-26 18:58:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 18:58:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-26 18:58:47,708 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 36 [2020-10-26 18:58:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:47,709 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-26 18:58:47,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 18:58:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-26 18:58:47,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 18:58:47,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:47,710 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:47,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 18:58:47,710 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:47,711 INFO L82 PathProgramCache]: Analyzing trace with hash 871787, now seen corresponding path program 1 times [2020-10-26 18:58:47,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:47,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394350756] [2020-10-26 18:58:47,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:47,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:47,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:47,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 18:58:47,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:47,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-26 18:58:47,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:47,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 18:58:47,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:47,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 18:58:47,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:48,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:48,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:48,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:48,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:48,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:48,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:48,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:48,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:48,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:48,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:48,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:48,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 18:58:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:48,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:48,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:48,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:58:48,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:48,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:48,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:48,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:48,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:48,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:58:48,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:48,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394350756] [2020-10-26 18:58:48,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:48,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 18:58:48,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169350010] [2020-10-26 18:58:48,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 18:58:48,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:48,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 18:58:48,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 18:58:48,085 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 11 states. [2020-10-26 18:58:48,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:48,266 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-26 18:58:48,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 18:58:48,267 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-26 18:58:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:48,268 INFO L225 Difference]: With dead ends: 68 [2020-10-26 18:58:48,268 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 18:58:48,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-26 18:58:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 18:58:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-26 18:58:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 18:58:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-26 18:58:48,277 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 38 [2020-10-26 18:58:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:48,277 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-26 18:58:48,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 18:58:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-26 18:58:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 18:58:48,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:48,278 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:48,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 18:58:48,279 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:48,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:48,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2028973196, now seen corresponding path program 8 times [2020-10-26 18:58:48,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:48,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055375060] [2020-10-26 18:58:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:48,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:48,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:48,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:50,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:51,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:51,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 18:58:51,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 18:58:51,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3079 [2020-10-26 18:58:51,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:51,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 18:58:51,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:58:51,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 18:58:51,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:52,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:52,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:52,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:52,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:52,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:52,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 18:58:52,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:52,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:52,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:52,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:52,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:52,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055375060] [2020-10-26 18:58:52,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:52,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 18:58:52,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772986173] [2020-10-26 18:58:52,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 18:58:52,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:52,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 18:58:52,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-26 18:58:52,100 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 23 states. [2020-10-26 18:58:53,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:53,162 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-10-26 18:58:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 18:58:53,163 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-10-26 18:58:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:53,164 INFO L225 Difference]: With dead ends: 85 [2020-10-26 18:58:53,165 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 18:58:53,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 18:58:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 18:58:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2020-10-26 18:58:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 18:58:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-26 18:58:53,175 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 38 [2020-10-26 18:58:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:53,176 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-26 18:58:53,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 18:58:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-26 18:58:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 18:58:53,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:53,177 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:53,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 18:58:53,177 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:53,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:53,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1148257494, now seen corresponding path program 8 times [2020-10-26 18:58:53,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:53,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602296820] [2020-10-26 18:58:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:53,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:53,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:53,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:54,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:54,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 18:58:54,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:58:54,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1534 [2020-10-26 18:58:54,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:54,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 18:58:54,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:54,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 18:58:54,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:55,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:55,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:55,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:55,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:55,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:55,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 18:58:55,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:55,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:55,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:55,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:55,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 18:58:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:55,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602296820] [2020-10-26 18:58:55,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:55,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 18:58:55,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025843045] [2020-10-26 18:58:55,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 18:58:55,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:55,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 18:58:55,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-10-26 18:58:55,523 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 22 states. [2020-10-26 18:58:56,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:56,782 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2020-10-26 18:58:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 18:58:56,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2020-10-26 18:58:56,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:56,785 INFO L225 Difference]: With dead ends: 88 [2020-10-26 18:58:56,785 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 18:58:56,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 18:58:56,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 18:58:56,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 54. [2020-10-26 18:58:56,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 18:58:56,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-26 18:58:56,795 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 39 [2020-10-26 18:58:56,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:56,795 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-26 18:58:56,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 18:58:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-26 18:58:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 18:58:56,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:56,796 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:56,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 18:58:56,797 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:56,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:56,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1927266832, now seen corresponding path program 2 times [2020-10-26 18:58:56,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:56,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558034940] [2020-10-26 18:58:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:56,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:56,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:58,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:58,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 18:58:58,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:58,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1862 [2020-10-26 18:58:58,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 18:58:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 18:58:58,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:59,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:59,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:59,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:59,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:59,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:59,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:59,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:59,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:59,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:59,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:59,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:59,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 18:58:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:59,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:59,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:59,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:58:59,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:59,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:58:59,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:59,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:59,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:59,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:58:59,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:59,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558034940] [2020-10-26 18:58:59,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:59,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 18:58:59,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833892758] [2020-10-26 18:58:59,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 18:58:59,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:59,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 18:58:59,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-26 18:58:59,098 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 19 states. [2020-10-26 18:58:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:59,769 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-26 18:58:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 18:58:59,769 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-10-26 18:58:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:59,770 INFO L225 Difference]: With dead ends: 74 [2020-10-26 18:58:59,770 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 18:58:59,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-26 18:58:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 18:58:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-10-26 18:58:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 18:58:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-10-26 18:58:59,791 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 41 [2020-10-26 18:58:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:59,792 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-10-26 18:58:59,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 18:58:59,792 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-10-26 18:58:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 18:58:59,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:59,793 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:59,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 18:58:59,794 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:59,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:59,794 INFO L82 PathProgramCache]: Analyzing trace with hash 100834577, now seen corresponding path program 9 times [2020-10-26 18:58:59,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:59,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465088736] [2020-10-26 18:58:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:59,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:59,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:00,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:01,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:01,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:02,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:03,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:03,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:04,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:04,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:04,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:04,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:04,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 18:59:04,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 18:59:04,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4854 [2020-10-26 18:59:04,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:04,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 18:59:04,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:04,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 18:59:04,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:05,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:05,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:05,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:05,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:05,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:05,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 18:59:05,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:05,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:05,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:05,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:05,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:59:05,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465088736] [2020-10-26 18:59:05,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:05,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 18:59:05,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478248242] [2020-10-26 18:59:05,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 18:59:05,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:05,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 18:59:05,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2020-10-26 18:59:05,409 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 24 states. [2020-10-26 18:59:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:06,565 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2020-10-26 18:59:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 18:59:06,566 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 41 [2020-10-26 18:59:06,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:06,568 INFO L225 Difference]: With dead ends: 106 [2020-10-26 18:59:06,568 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 18:59:06,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 18:59:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 18:59:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 68. [2020-10-26 18:59:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 18:59:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-10-26 18:59:06,587 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 41 [2020-10-26 18:59:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:06,587 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-10-26 18:59:06,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 18:59:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-10-26 18:59:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 18:59:06,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:06,588 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:06,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 18:59:06,588 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash -791012539, now seen corresponding path program 9 times [2020-10-26 18:59:06,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:06,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145748939] [2020-10-26 18:59:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:06,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:06,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:06,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:07,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:07,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:07,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 18:59:07,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:07,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1359 [2020-10-26 18:59:07,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 18:59:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 18:59:07,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:08,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:08,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:08,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:08,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:08,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:08,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:08,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:08,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:08,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:08,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:08,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:59:08,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145748939] [2020-10-26 18:59:08,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:08,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 18:59:08,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739912045] [2020-10-26 18:59:08,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 18:59:08,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:08,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 18:59:08,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2020-10-26 18:59:08,945 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 23 states. [2020-10-26 18:59:10,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:10,824 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2020-10-26 18:59:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 18:59:10,829 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-10-26 18:59:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:10,830 INFO L225 Difference]: With dead ends: 113 [2020-10-26 18:59:10,830 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 18:59:10,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 18:59:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 18:59:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 69. [2020-10-26 18:59:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 18:59:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-10-26 18:59:10,848 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 42 [2020-10-26 18:59:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:10,849 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-10-26 18:59:10,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 18:59:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-10-26 18:59:10,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 18:59:10,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:10,850 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:10,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 18:59:10,850 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:10,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:10,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2082718539, now seen corresponding path program 3 times [2020-10-26 18:59:10,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:10,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482553472] [2020-10-26 18:59:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:10,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:11,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:11,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:14,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:14,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 18:59:14,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:14,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3744 [2020-10-26 18:59:14,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:14,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 18:59:14,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:14,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 18:59:14,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:15,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:15,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:15,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:15,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:15,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:15,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:15,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:15,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:15,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:15,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:15,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:15,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 18:59:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:15,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:15,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:15,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:15,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:15,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:59:15,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:15,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:59:15,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:15,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 18:59:15,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:59:15,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482553472] [2020-10-26 18:59:15,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:15,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 18:59:15,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345632904] [2020-10-26 18:59:15,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 18:59:15,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:15,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 18:59:15,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2020-10-26 18:59:15,223 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 21 states. [2020-10-26 18:59:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:16,821 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2020-10-26 18:59:16,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 18:59:16,821 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 44 [2020-10-26 18:59:16,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:16,823 INFO L225 Difference]: With dead ends: 97 [2020-10-26 18:59:16,823 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 18:59:16,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 18:59:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 18:59:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2020-10-26 18:59:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 18:59:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-10-26 18:59:16,840 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 44 [2020-10-26 18:59:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:16,841 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-10-26 18:59:16,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 18:59:16,841 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-10-26 18:59:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 18:59:16,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:16,842 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:16,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 18:59:16,842 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:16,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:16,842 INFO L82 PathProgramCache]: Analyzing trace with hash -184147348, now seen corresponding path program 10 times [2020-10-26 18:59:16,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:16,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407511114] [2020-10-26 18:59:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:16,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:17,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:17,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:17,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:19,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:19,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:20,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:20,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:20,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:20,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:21,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:21,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:21,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:21,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:21,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:21,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 18:59:21,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-26 18:59:21,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 18:59:21,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:21,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 18:59:21,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:21,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 18:59:21,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:23,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:23,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:23,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:23,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:23,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:23,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 18:59:23,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:23,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:23,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:23,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:23,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:59:23,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407511114] [2020-10-26 18:59:23,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:23,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 18:59:23,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631878007] [2020-10-26 18:59:23,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 18:59:23,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:23,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 18:59:23,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-10-26 18:59:23,056 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 27 states. [2020-10-26 18:59:24,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:24,981 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2020-10-26 18:59:24,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 18:59:24,982 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2020-10-26 18:59:24,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:24,983 INFO L225 Difference]: With dead ends: 129 [2020-10-26 18:59:24,984 INFO L226 Difference]: Without dead ends: 126 [2020-10-26 18:59:24,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 18:59:24,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-26 18:59:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 87. [2020-10-26 18:59:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 18:59:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-10-26 18:59:25,013 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 44 [2020-10-26 18:59:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:25,013 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-10-26 18:59:25,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 18:59:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-10-26 18:59:25,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 18:59:25,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:25,015 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:25,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 18:59:25,017 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:25,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:25,017 INFO L82 PathProgramCache]: Analyzing trace with hash 926002034, now seen corresponding path program 1 times [2020-10-26 18:59:25,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:25,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974753257] [2020-10-26 18:59:25,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:25,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:25,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:25,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:25,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:30,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:30,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 18:59:30,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 18:59:30,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 18:59:30,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:30,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 18:59:30,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:30,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 18:59:30,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:30,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:30,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:30,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:30,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:30,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:30,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 18:59:30,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:30,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:30,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:30,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:30,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:30,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 18:59:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:30,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:30,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:30,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:30,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:30,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:30,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:30,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:30,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:30,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:30,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 18:59:30,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974753257] [2020-10-26 18:59:30,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:30,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 18:59:30,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866795265] [2020-10-26 18:59:30,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 18:59:30,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:30,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 18:59:30,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-26 18:59:30,224 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 13 states. [2020-10-26 18:59:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:30,821 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2020-10-26 18:59:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 18:59:30,822 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-26 18:59:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:30,825 INFO L225 Difference]: With dead ends: 119 [2020-10-26 18:59:30,825 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 18:59:30,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2020-10-26 18:59:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 18:59:30,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2020-10-26 18:59:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 18:59:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-26 18:59:30,860 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 46 [2020-10-26 18:59:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:30,860 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-26 18:59:30,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 18:59:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-26 18:59:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 18:59:30,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:30,861 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:30,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 18:59:30,862 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:30,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:30,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1035517622, now seen corresponding path program 10 times [2020-10-26 18:59:30,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:30,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802602991] [2020-10-26 18:59:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:30,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:31,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:31,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:31,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:31,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:32,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:32,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 18:59:32,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 18:59:32,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1394 [2020-10-26 18:59:32,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:32,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 18:59:32,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:32,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 18:59:32,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:33,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:33,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:33,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:33,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:33,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:33,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:33,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:33,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 3 proven. 152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:59:33,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802602991] [2020-10-26 18:59:33,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:33,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 18:59:33,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817779461] [2020-10-26 18:59:33,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 18:59:33,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:33,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 18:59:33,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2020-10-26 18:59:33,318 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 25 states. [2020-10-26 18:59:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:35,341 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2020-10-26 18:59:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 18:59:35,342 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 45 [2020-10-26 18:59:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:35,344 INFO L225 Difference]: With dead ends: 118 [2020-10-26 18:59:35,344 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 18:59:35,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=244, Invalid=1316, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 18:59:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 18:59:35,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-26 18:59:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 18:59:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-10-26 18:59:35,360 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 45 [2020-10-26 18:59:35,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:35,361 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-10-26 18:59:35,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 18:59:35,361 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-10-26 18:59:35,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 18:59:35,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:35,362 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:35,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 18:59:35,362 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:35,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:35,363 INFO L82 PathProgramCache]: Analyzing trace with hash -958432240, now seen corresponding path program 4 times [2020-10-26 18:59:35,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:35,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965212335] [2020-10-26 18:59:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:35,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:35,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:35,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:35,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:35,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:40,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:40,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 18:59:40,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 18:59:40,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 18:59:40,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 18:59:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 18:59:40,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:41,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:41,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:41,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:41,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:41,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:41,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:41,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:41,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:41,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:41,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 18:59:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:41,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:41,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:41,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:41,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:41,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:41,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:41,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:41,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:59:41,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965212335] [2020-10-26 18:59:41,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:41,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 18:59:41,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753839368] [2020-10-26 18:59:41,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 18:59:41,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:41,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 18:59:41,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-26 18:59:41,030 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 22 states. [2020-10-26 18:59:42,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:42,310 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2020-10-26 18:59:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 18:59:42,311 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2020-10-26 18:59:42,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:42,312 INFO L225 Difference]: With dead ends: 118 [2020-10-26 18:59:42,312 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 18:59:42,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 18:59:42,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 18:59:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 74. [2020-10-26 18:59:42,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 18:59:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-10-26 18:59:42,330 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 47 [2020-10-26 18:59:42,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:42,331 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-10-26 18:59:42,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 18:59:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-10-26 18:59:42,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 18:59:42,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:42,332 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:42,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 18:59:42,332 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:42,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:42,332 INFO L82 PathProgramCache]: Analyzing trace with hash -922969898, now seen corresponding path program 5 times [2020-10-26 18:59:42,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:42,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717243944] [2020-10-26 18:59:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:42,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:42,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:42,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 18:59:42,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:42,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 18:59:42,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:42,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 18:59:42,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:42,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 18:59:42,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:42,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:42,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:42,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:42,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:42,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:42,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:59:42,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:42,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:42,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:42,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:42,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:42,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 18:59:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:42,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:42,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:42,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:42,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:42,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:42,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:42,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:42,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:42,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:42,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:42,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 18:59:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:42,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:42,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:42,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:42,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:42,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 18:59:42,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:42,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:42,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:42,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:42,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 18:59:42,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717243944] [2020-10-26 18:59:42,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:42,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 18:59:42,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576735198] [2020-10-26 18:59:42,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 18:59:42,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:42,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 18:59:42,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-26 18:59:42,696 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 13 states. [2020-10-26 18:59:42,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:42,919 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-26 18:59:42,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 18:59:42,920 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-26 18:59:42,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:42,921 INFO L225 Difference]: With dead ends: 92 [2020-10-26 18:59:42,921 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 18:59:42,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 18:59:42,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 18:59:42,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-26 18:59:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 18:59:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-26 18:59:42,934 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 49 [2020-10-26 18:59:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:42,935 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-26 18:59:42,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 18:59:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-26 18:59:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 18:59:42,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:42,940 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:42,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 18:59:42,940 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:42,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:42,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1042135305, now seen corresponding path program 2 times [2020-10-26 18:59:42,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:42,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129650156] [2020-10-26 18:59:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:42,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:43,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:43,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:43,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:43,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:44,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:46,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:46,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:46,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:46,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:47,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:47,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 18:59:47,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 18:59:47,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 18:59:47,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:47,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 18:59:47,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 18:59:47,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 18:59:47,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:48,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:48,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:48,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:48,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:48,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:48,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:59:48,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:48,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:48,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:48,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:59:48,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:48,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 18:59:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:48,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:48,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:48,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:48,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:48,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:48,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:48,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:48,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:48,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:48,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 2 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:59:48,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129650156] [2020-10-26 18:59:48,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:48,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 18:59:48,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833564057] [2020-10-26 18:59:48,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 18:59:48,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:48,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 18:59:48,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-26 18:59:48,811 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 26 states. [2020-10-26 18:59:50,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:50,260 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2020-10-26 18:59:50,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 18:59:50,265 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2020-10-26 18:59:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:50,267 INFO L225 Difference]: With dead ends: 112 [2020-10-26 18:59:50,267 INFO L226 Difference]: Without dead ends: 109 [2020-10-26 18:59:50,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 18:59:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-26 18:59:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 64. [2020-10-26 18:59:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 18:59:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-26 18:59:50,280 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 49 [2020-10-26 18:59:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:50,280 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-26 18:59:50,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 18:59:50,280 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-26 18:59:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 18:59:50,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:50,281 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:50,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 18:59:50,282 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:50,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1841147605, now seen corresponding path program 6 times [2020-10-26 18:59:50,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:50,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134482631] [2020-10-26 18:59:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:50,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:50,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:50,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:50,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:50,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:51,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:52,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:55,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:55,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 18:59:55,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 18:59:55,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 18:59:55,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:55,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 18:59:55,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:55,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 18:59:55,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:56,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:56,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:56,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:56,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:56,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:56,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:56,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:56,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:56,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:56,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:56,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:56,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 18:59:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:56,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:56,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:56,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:56,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:56,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:56,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:56,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:59:56,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:56,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 18:59:56,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 1 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:59:56,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134482631] [2020-10-26 18:59:56,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:56,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 18:59:56,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039864223] [2020-10-26 18:59:56,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 18:59:56,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:56,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 18:59:56,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2020-10-26 18:59:56,274 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 25 states. [2020-10-26 18:59:58,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:58,520 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2020-10-26 18:59:58,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 18:59:58,521 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 50 [2020-10-26 18:59:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:58,523 INFO L225 Difference]: With dead ends: 114 [2020-10-26 18:59:58,523 INFO L226 Difference]: Without dead ends: 111 [2020-10-26 18:59:58,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 18:59:58,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-26 18:59:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 74. [2020-10-26 18:59:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 18:59:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2020-10-26 18:59:58,541 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 50 [2020-10-26 18:59:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:58,541 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2020-10-26 18:59:58,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 18:59:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2020-10-26 18:59:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 18:59:58,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:58,542 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:58,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 18:59:58,542 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:58,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1191088945, now seen corresponding path program 7 times [2020-10-26 18:59:58,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:58,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907825246] [2020-10-26 18:59:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:58,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:58,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:58,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:03,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:03,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:00:03,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:00:03,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:00:03,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:03,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:00:03,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:03,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 19:00:03,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:04,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:04,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:04,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:04,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:04,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:04,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:04,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:04,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:04,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:04,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:00:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:04,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:04,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:04,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:04,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:04,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:04,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:04,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:00:04,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:04,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:00:04,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:04,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:00:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:04,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:04,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:04,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:04,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:04,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:04,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:04,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:04,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:04,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:04,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:00:04,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907825246] [2020-10-26 19:00:04,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:04,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:00:04,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789224908] [2020-10-26 19:00:04,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:00:04,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:00:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:00:04,160 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 23 states. [2020-10-26 19:00:05,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:05,612 INFO L93 Difference]: Finished difference Result 98 states and 109 transitions. [2020-10-26 19:00:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:00:05,613 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-26 19:00:05,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:05,614 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:00:05,614 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:00:05,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:00:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:00:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-10-26 19:00:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:00:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2020-10-26 19:00:05,644 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 52 [2020-10-26 19:00:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:05,644 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2020-10-26 19:00:05,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:00:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2020-10-26 19:00:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:00:05,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:05,645 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:05,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:00:05,646 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:05,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:05,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1071923538, now seen corresponding path program 3 times [2020-10-26 19:00:05,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:05,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650478114] [2020-10-26 19:00:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:05,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:05,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:05,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:06,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:06,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:07,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:07,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:07,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:07,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:08,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:08,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:09,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:09,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:09,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:09,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:10,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:10,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:00:10,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:00:10,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:00:10,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:10,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:00:10,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:00:10,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:00:10,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:10,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:10,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:10,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:10,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:10,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:10,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:00:10,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:10,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:10,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:10,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:00:10,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:10,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:00:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:10,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:10,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:10,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:10,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:10,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:10,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:10,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:10,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:10,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:10,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:00:10,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650478114] [2020-10-26 19:00:10,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:10,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:00:10,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945120404] [2020-10-26 19:00:10,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:00:10,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:10,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:00:10,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:00:10,891 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 15 states. [2020-10-26 19:00:11,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:11,382 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-10-26 19:00:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:00:11,383 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-26 19:00:11,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:11,384 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:00:11,384 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:00:11,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:00:11,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:00:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 91. [2020-10-26 19:00:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:00:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-10-26 19:00:11,407 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 52 [2020-10-26 19:00:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:11,408 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-10-26 19:00:11,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:00:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-10-26 19:00:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:00:11,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:11,409 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:11,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:00:11,409 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:11,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:11,410 INFO L82 PathProgramCache]: Analyzing trace with hash -729832912, now seen corresponding path program 8 times [2020-10-26 19:00:11,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:11,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290709646] [2020-10-26 19:00:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:11,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:12,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:12,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:12,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:14,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:14,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:16,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:16,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:00:16,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:00:16,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:00:16,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:16,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:00:16,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:16,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:00:16,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:17,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:17,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:17,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:17,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:17,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:17,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:00:17,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:17,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:17,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:17,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:17,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:17,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:00:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:17,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:17,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:17,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:17,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:17,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:00:17,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:17,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:00:17,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:17,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:00:17,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:00:17,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290709646] [2020-10-26 19:00:17,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:17,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:00:17,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77672886] [2020-10-26 19:00:17,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:00:17,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:17,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:00:17,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:00:17,236 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 24 states. [2020-10-26 19:00:18,161 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-26 19:00:18,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:18,959 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2020-10-26 19:00:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:00:18,959 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-26 19:00:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:18,961 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:00:18,961 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:00:18,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:00:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:00:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 90. [2020-10-26 19:00:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:00:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-10-26 19:00:18,981 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 53 [2020-10-26 19:00:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:18,981 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-10-26 19:00:18,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:00:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-10-26 19:00:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:00:18,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:18,982 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:18,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:00:18,982 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:18,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:18,983 INFO L82 PathProgramCache]: Analyzing trace with hash -282347786, now seen corresponding path program 9 times [2020-10-26 19:00:18,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:18,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554277335] [2020-10-26 19:00:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:19,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:19,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:19,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:19,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:21,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:21,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:23,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:23,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:00:23,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:00:23,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:00:23,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:23,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:00:23,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:23,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:00:23,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:24,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:24,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:24,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:24,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:24,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:24,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:24,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:24,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:24,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:24,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:00:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:24,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:24,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:24,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:24,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:24,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:24,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:24,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:24,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:24,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:24,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:24,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:00:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:24,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:24,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:24,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:24,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:24,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:24,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:00:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:24,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:00:24,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:00:24,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554277335] [2020-10-26 19:00:24,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:24,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:00:24,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912726674] [2020-10-26 19:00:24,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:00:24,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:24,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:00:24,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:00:24,665 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 24 states. [2020-10-26 19:00:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:26,698 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2020-10-26 19:00:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:00:26,699 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-26 19:00:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:26,701 INFO L225 Difference]: With dead ends: 113 [2020-10-26 19:00:26,701 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:00:26,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:00:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:00:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2020-10-26 19:00:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:00:26,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-10-26 19:00:26,721 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 55 [2020-10-26 19:00:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:26,721 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-10-26 19:00:26,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:00:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-10-26 19:00:26,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:00:26,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:26,722 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:26,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:00:26,722 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash -870235887, now seen corresponding path program 10 times [2020-10-26 19:00:26,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:26,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215722120] [2020-10-26 19:00:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:26,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:26,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:26,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:27,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:27,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:27,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:28,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:28,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:29,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:31,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:31,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:00:31,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:00:31,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:00:31,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:31,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:00:31,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:31,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 19:00:31,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:32,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:32,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:32,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:32,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:32,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:32,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:32,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:32,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:32,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:32,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:32,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:32,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:00:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:32,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:32,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:32,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:32,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:32,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:32,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:32,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:32,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:32,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:32,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:32,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:00:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:32,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:32,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:32,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:32,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:32,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:32,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:32,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:00:32,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215722120] [2020-10-26 19:00:32,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:32,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:00:32,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864171359] [2020-10-26 19:00:32,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:00:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:00:32,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:00:32,661 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 25 states. [2020-10-26 19:00:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:34,358 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2020-10-26 19:00:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:00:34,364 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-26 19:00:34,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:34,366 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:00:34,366 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:00:34,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:00:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:00:34,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2020-10-26 19:00:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:00:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-10-26 19:00:34,389 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 58 [2020-10-26 19:00:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:34,389 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-10-26 19:00:34,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:00:34,390 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-10-26 19:00:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:00:34,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:34,391 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:34,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:00:34,391 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:34,391 INFO L82 PathProgramCache]: Analyzing trace with hash 588651799, now seen corresponding path program 11 times [2020-10-26 19:00:34,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:34,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114784934] [2020-10-26 19:00:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:34,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:34,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:34,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:00:34,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:34,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-26 19:00:34,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:00:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:00:34,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:34,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:34,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:34,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:34,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:34,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:34,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:34,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:34,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:34,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:00:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:34,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:34,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:34,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:34,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:34,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:34,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:34,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:34,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:34,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:34,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:34,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:00:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:34,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:34,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:34,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:34,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:34,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:34,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:34,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:34,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:34,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:34,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:34,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:00:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:34,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:34,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:34,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:34,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:34,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:34,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:34,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:34,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:34,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:34,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 24 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:00:34,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114784934] [2020-10-26 19:00:34,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:34,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:00:34,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129357401] [2020-10-26 19:00:34,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:00:34,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:34,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:00:34,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:00:34,811 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 15 states. [2020-10-26 19:00:35,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:35,171 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2020-10-26 19:00:35,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:00:35,171 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-26 19:00:35,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:35,173 INFO L225 Difference]: With dead ends: 115 [2020-10-26 19:00:35,173 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:00:35,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:00:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:00:35,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-26 19:00:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:00:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-10-26 19:00:35,199 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 60 [2020-10-26 19:00:35,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:35,199 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-10-26 19:00:35,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:00:35,200 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-10-26 19:00:35,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:00:35,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:35,201 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:35,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:00:35,201 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:35,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:35,201 INFO L82 PathProgramCache]: Analyzing trace with hash 231980310, now seen corresponding path program 12 times [2020-10-26 19:00:35,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:35,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121895542] [2020-10-26 19:00:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:35,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:35,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:35,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:35,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:35,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:35,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:36,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:37,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:38,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:40,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:40,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:40,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:00:40,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:00:40,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:00:40,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:40,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:00:40,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:40,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:00:40,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:40,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:40,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:40,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:40,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:40,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:40,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:00:40,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:40,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:40,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:40,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:40,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:40,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:00:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:40,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:40,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:40,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:40,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:40,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:40,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:40,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:40,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:40,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:40,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:40,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:00:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:40,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:40,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:40,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:40,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:40,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:00:40,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:00:40,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:40,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:00:40,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 9 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:00:40,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121895542] [2020-10-26 19:00:40,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:40,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:00:40,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907933906] [2020-10-26 19:00:40,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:00:40,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:40,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:00:40,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:00:40,958 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 25 states. [2020-10-26 19:00:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:42,493 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2020-10-26 19:00:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:00:42,494 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2020-10-26 19:00:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:42,495 INFO L225 Difference]: With dead ends: 101 [2020-10-26 19:00:42,495 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:00:42,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:00:42,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:00:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-10-26 19:00:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:00:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2020-10-26 19:00:42,517 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 61 [2020-10-26 19:00:42,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:42,518 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2020-10-26 19:00:42,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:00:42,518 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2020-10-26 19:00:42,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:00:42,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:42,519 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:42,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:00:42,519 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:42,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1038504996, now seen corresponding path program 13 times [2020-10-26 19:00:42,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:42,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082460223] [2020-10-26 19:00:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:42,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:42,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:42,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:42,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:47,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:47,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:00:47,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:00:47,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:00:47,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:00:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:47,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:00:47,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:48,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:48,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:48,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:48,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:48,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:48,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:48,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:48,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:48,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:48,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:48,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:48,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:00:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:48,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:48,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:48,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:48,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:48,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:48,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:48,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:48,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:48,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:48,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:48,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:00:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:48,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:48,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:48,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:48,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:48,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:48,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:48,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:48,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:48,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:48,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:48,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:00:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:48,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:48,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:48,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:48,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:48,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:48,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:48,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:48,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:48,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:48,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 6 proven. 118 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:00:48,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082460223] [2020-10-26 19:00:48,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:48,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:00:48,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828786995] [2020-10-26 19:00:48,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:00:48,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:48,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:00:48,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:00:48,300 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand 25 states. [2020-10-26 19:00:49,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:49,503 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2020-10-26 19:00:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:00:49,505 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 63 [2020-10-26 19:00:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:49,506 INFO L225 Difference]: With dead ends: 115 [2020-10-26 19:00:49,506 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:00:49,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:00:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:00:49,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-10-26 19:00:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:00:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2020-10-26 19:00:49,536 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 63 [2020-10-26 19:00:49,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:49,536 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2020-10-26 19:00:49,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:00:49,536 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2020-10-26 19:00:49,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:00:49,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:49,537 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:49,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:00:49,538 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:49,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:49,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1629285111, now seen corresponding path program 14 times [2020-10-26 19:00:49,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:49,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829871410] [2020-10-26 19:00:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:49,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:49,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:49,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:49,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:50,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:52,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:52,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:54,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:54,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:00:54,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:00:54,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:00:54,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:54,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:00:54,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:54,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 19:00:54,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:55,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:55,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:55,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:55,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:55,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:55,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:55,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:55,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:55,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:55,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:55,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:55,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:00:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:55,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:55,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:55,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:55,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:55,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:00:55,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:55,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:00:55,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:55,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:00:55,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:55,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:00:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:55,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:55,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:55,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:55,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:55,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:00:55,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:55,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:00:55,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:55,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:00:55,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:55,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:00:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:55,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:55,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:55,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:55,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:55,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:55,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:55,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:00:55,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:55,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:00:55,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 4 proven. 152 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:00:55,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829871410] [2020-10-26 19:00:55,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:55,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:00:55,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753673021] [2020-10-26 19:00:55,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:00:55,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:55,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:00:55,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=752, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:00:55,868 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand 29 states. [2020-10-26 19:00:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:59,609 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2020-10-26 19:00:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:00:59,609 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-26 19:00:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:59,611 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:00:59,611 INFO L226 Difference]: Without dead ends: 126 [2020-10-26 19:00:59,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=286, Invalid=3136, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:00:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-26 19:00:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102. [2020-10-26 19:00:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:00:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-10-26 19:00:59,642 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 66 [2020-10-26 19:00:59,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:59,642 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-10-26 19:00:59,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:00:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-10-26 19:00:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:00:59,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:59,643 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:59,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:00:59,643 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:59,644 INFO L82 PathProgramCache]: Analyzing trace with hash -605449732, now seen corresponding path program 15 times [2020-10-26 19:00:59,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:59,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609533513] [2020-10-26 19:00:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:59,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:59,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:59,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:59,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:00,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:00,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:01,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:02,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:03,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:03,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:04,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:04,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:04,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:01:04,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:01:04,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:01:04,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:04,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:01:04,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:04,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:01:04,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:05,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:05,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:05,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:05,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:05,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:05,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:05,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:05,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:05,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:01:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:05,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:05,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:05,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:05,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:05,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:01:05,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:05,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:01:05,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:05,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:01:05,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:05,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:01:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:05,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:05,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:05,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:05,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:05,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:05,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:05,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:05,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:01:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:05,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:05,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:05,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:05,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:05,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:05,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:05,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:05,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:05,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:05,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 5 proven. 180 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:01:05,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609533513] [2020-10-26 19:01:05,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:05,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:01:05,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671167380] [2020-10-26 19:01:05,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:01:05,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:05,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:01:05,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=749, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:01:05,686 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 29 states. [2020-10-26 19:01:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:07,669 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-10-26 19:01:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:01:07,670 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 69 [2020-10-26 19:01:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:07,671 INFO L225 Difference]: With dead ends: 115 [2020-10-26 19:01:07,671 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:01:07,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:01:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:01:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2020-10-26 19:01:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:01:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-10-26 19:01:07,697 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 69 [2020-10-26 19:01:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:07,697 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-10-26 19:01:07,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:01:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-10-26 19:01:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:01:07,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:07,698 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:07,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:01:07,698 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:07,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:07,699 INFO L82 PathProgramCache]: Analyzing trace with hash -951100734, now seen corresponding path program 16 times [2020-10-26 19:01:07,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:07,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459627016] [2020-10-26 19:01:07,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:07,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:07,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:07,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:01:07,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:07,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-26 19:01:07,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:07,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:01:07,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:07,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-26 19:01:07,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:08,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:08,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:08,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:08,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:08,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:08,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:08,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:08,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:08,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:08,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:08,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:08,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:01:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:08,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:08,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:08,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:08,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:08,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:08,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:08,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:08,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:08,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:08,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:08,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:01:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:08,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:08,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:08,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:08,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:08,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:08,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:08,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:08,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:08,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:08,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:08,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:01:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:08,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:08,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:08,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:08,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:08,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:08,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:08,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:08,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:08,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:08,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:08,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:01:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:08,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:08,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:08,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:08,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:08,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:08,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:08,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:08,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:08,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:08,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 40 proven. 100 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-26 19:01:08,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459627016] [2020-10-26 19:01:08,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:08,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:01:08,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523152438] [2020-10-26 19:01:08,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:01:08,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:08,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:01:08,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:01:08,221 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 17 states. [2020-10-26 19:01:08,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:08,564 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2020-10-26 19:01:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:01:08,564 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-26 19:01:08,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:08,566 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:01:08,566 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:01:08,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:01:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:01:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-26 19:01:08,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:01:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2020-10-26 19:01:08,590 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 71 [2020-10-26 19:01:08,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:08,590 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2020-10-26 19:01:08,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:01:08,590 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2020-10-26 19:01:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:01:08,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:08,591 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:08,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:01:08,592 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:08,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:08,592 INFO L82 PathProgramCache]: Analyzing trace with hash 769347293, now seen corresponding path program 17 times [2020-10-26 19:01:08,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:08,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419941869] [2020-10-26 19:01:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:08,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:08,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:08,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:09,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:09,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:13,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:13,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:01:13,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:01:13,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:01:13,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:13,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:01:13,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:13,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 19:01:13,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:14,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:14,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:14,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:14,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:14,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:14,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:14,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:14,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:14,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:14,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:14,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:14,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:01:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:14,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:14,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:14,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:14,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:14,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:01:14,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:14,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:01:14,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:14,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:01:14,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:14,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:01:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:14,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:14,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:14,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:14,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:14,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:14,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:14,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:14,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:14,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:01:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:14,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:14,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:14,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:14,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:14,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:14,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:14,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:14,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:14,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:14,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:14,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:01:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:14,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:14,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:14,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:14,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:14,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:14,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:14,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:14,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:14,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 7 proven. 168 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:01:14,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419941869] [2020-10-26 19:01:14,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:14,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:01:14,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005641438] [2020-10-26 19:01:14,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:01:14,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:14,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:01:14,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:01:14,653 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand 28 states. [2020-10-26 19:01:15,780 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-26 19:01:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:16,753 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2020-10-26 19:01:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:01:16,754 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 74 [2020-10-26 19:01:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:16,755 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:01:16,755 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:01:16,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=124, Invalid=1516, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:01:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:01:16,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2020-10-26 19:01:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:01:16,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2020-10-26 19:01:16,786 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 74 [2020-10-26 19:01:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:16,786 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2020-10-26 19:01:16,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:01:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2020-10-26 19:01:16,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:01:16,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:16,788 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:16,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:01:16,788 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:16,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1503190814, now seen corresponding path program 18 times [2020-10-26 19:01:16,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:16,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671010436] [2020-10-26 19:01:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:16,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:16,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:17,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:17,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:17,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:19,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:20,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:20,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:20,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:20,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:20,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:20,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:21,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:21,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:01:21,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:01:21,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:01:21,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:21,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:01:21,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:21,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:01:21,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:22,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:22,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:22,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:22,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:22,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:22,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:22,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:22,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:22,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:22,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:22,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:22,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:01:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:22,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:22,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:22,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:22,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:22,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:01:22,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:01:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:22,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:01:22,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:22,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:01:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:22,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:22,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:22,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:22,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:22,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:01:22,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:22,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:22,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:22,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:22,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:22,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:01:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:22,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:22,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:22,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:22,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:22,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:22,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:22,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:22,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:22,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:22,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:22,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 19:01:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:22,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:22,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:22,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:22,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:22,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:22,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:22,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:22,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:22,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:22,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 7 proven. 197 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:01:22,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671010436] [2020-10-26 19:01:22,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:22,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:01:22,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231430460] [2020-10-26 19:01:22,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:01:22,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:22,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:01:22,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=807, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:01:22,913 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand 30 states. [2020-10-26 19:01:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:26,243 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2020-10-26 19:01:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:01:26,243 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 77 [2020-10-26 19:01:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:26,246 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:01:26,246 INFO L226 Difference]: Without dead ends: 135 [2020-10-26 19:01:26,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=274, Invalid=3266, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:01:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-26 19:01:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2020-10-26 19:01:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:01:26,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2020-10-26 19:01:26,280 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 77 [2020-10-26 19:01:26,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:26,280 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2020-10-26 19:01:26,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:01:26,280 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2020-10-26 19:01:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:01:26,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:26,281 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:26,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:01:26,282 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:26,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:26,282 INFO L82 PathProgramCache]: Analyzing trace with hash 954752713, now seen corresponding path program 4 times [2020-10-26 19:01:26,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:26,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105657830] [2020-10-26 19:01:26,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:26,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:26,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:26,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:26,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:28,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:28,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:29,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:29,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:29,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:29,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:30,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:30,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:30,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:31,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:31,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:01:31,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:01:31,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:01:31,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:31,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:01:31,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:01:31,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:01:31,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:31,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:31,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:31,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:31,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:31,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:31,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:01:31,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:31,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:31,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:31,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:01:31,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:31,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:01:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:31,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:31,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:31,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:31,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:31,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:31,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:31,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:31,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:31,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:31,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:31,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:01:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:31,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:31,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:31,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:31,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:31,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:31,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:31,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:31,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:31,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:31,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:31,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:01:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:31,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:31,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:31,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:31,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:31,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:31,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:31,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:31,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:31,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:31,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:31,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:01:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:31,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:31,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:31,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:31,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:31,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:31,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:31,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:31,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:31,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:31,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 8 proven. 176 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-26 19:01:31,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105657830] [2020-10-26 19:01:31,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:31,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:01:31,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399732386] [2020-10-26 19:01:31,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:01:31,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:31,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:01:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:01:31,635 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand 16 states. [2020-10-26 19:01:32,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:32,329 INFO L93 Difference]: Finished difference Result 186 states and 212 transitions. [2020-10-26 19:01:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:01:32,330 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-10-26 19:01:32,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:32,331 INFO L225 Difference]: With dead ends: 186 [2020-10-26 19:01:32,331 INFO L226 Difference]: Without dead ends: 150 [2020-10-26 19:01:32,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:01:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-26 19:01:32,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 113. [2020-10-26 19:01:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:01:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2020-10-26 19:01:32,363 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 79 [2020-10-26 19:01:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:32,366 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2020-10-26 19:01:32,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:01:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2020-10-26 19:01:32,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:01:32,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:32,367 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:32,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:01:32,367 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:32,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:32,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1116449603, now seen corresponding path program 19 times [2020-10-26 19:01:32,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:32,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803120094] [2020-10-26 19:01:32,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:32,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:32,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:32,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:33,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:34,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:34,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:35,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:36,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:36,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:36,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:37,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:37,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:01:37,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:01:37,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:01:37,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:37,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:01:37,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:37,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 19:01:37,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:38,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:38,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:38,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:38,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:38,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:38,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:38,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:38,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:38,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:38,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:38,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:38,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:01:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:38,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:38,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:38,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:38,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:38,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:38,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:38,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:38,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:38,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:38,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:38,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:01:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:38,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:38,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:38,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:38,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:38,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:01:38,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:01:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:01:38,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:38,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:01:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:38,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:38,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:38,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:38,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:38,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:38,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:38,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:38,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:38,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:38,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:38,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:01:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:38,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:38,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:38,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:38,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:38,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:38,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:38,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 10 proven. 226 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:01:38,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803120094] [2020-10-26 19:01:38,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:38,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:01:38,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337097657] [2020-10-26 19:01:38,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:01:38,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:01:38,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:01:38,876 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand 31 states. [2020-10-26 19:01:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:43,622 INFO L93 Difference]: Finished difference Result 166 states and 190 transitions. [2020-10-26 19:01:43,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:01:43,623 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 80 [2020-10-26 19:01:43,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:43,624 INFO L225 Difference]: With dead ends: 166 [2020-10-26 19:01:43,624 INFO L226 Difference]: Without dead ends: 163 [2020-10-26 19:01:43,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=321, Invalid=3461, Unknown=0, NotChecked=0, Total=3782 [2020-10-26 19:01:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-26 19:01:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2020-10-26 19:01:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:01:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2020-10-26 19:01:43,663 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 80 [2020-10-26 19:01:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:43,664 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2020-10-26 19:01:43,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:01:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2020-10-26 19:01:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:01:43,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:43,665 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:43,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:01:43,665 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash 151153859, now seen corresponding path program 20 times [2020-10-26 19:01:43,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:43,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409920914] [2020-10-26 19:01:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:43,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:44,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:44,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:01:44,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:44,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-26 19:01:44,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:44,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:01:44,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:44,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:01:44,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:44,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:44,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:44,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:44,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:44,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:44,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:44,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:44,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:44,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:44,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:44,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:44,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:01:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:44,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:44,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:44,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:44,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:44,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:44,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:44,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:44,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:01:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:44,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:44,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:44,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:44,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:44,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:44,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:44,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:44,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:44,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:44,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:44,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:01:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:44,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:44,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:44,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:44,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:44,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:44,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:44,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:44,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:44,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:44,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:44,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:01:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:44,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:44,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:44,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:44,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:44,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:44,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:44,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:44,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:44,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:44,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:44,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:01:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:44,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:44,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:44,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:44,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:44,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:44,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:44,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:44,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:44,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:44,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 60 proven. 126 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-26 19:01:44,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409920914] [2020-10-26 19:01:44,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:44,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:01:44,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033528428] [2020-10-26 19:01:44,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:01:44,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:44,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:01:44,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:01:44,412 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand 19 states. [2020-10-26 19:01:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:44,865 INFO L93 Difference]: Finished difference Result 136 states and 152 transitions. [2020-10-26 19:01:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:01:44,866 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2020-10-26 19:01:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:44,868 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:01:44,868 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:01:44,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:01:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:01:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-26 19:01:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:01:44,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2020-10-26 19:01:44,897 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 82 [2020-10-26 19:01:44,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:44,898 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2020-10-26 19:01:44,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:01:44,898 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2020-10-26 19:01:44,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:01:44,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:44,899 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:44,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:01:44,899 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:44,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:44,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1049098268, now seen corresponding path program 5 times [2020-10-26 19:01:44,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:44,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728728310] [2020-10-26 19:01:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:44,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:45,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:45,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:45,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:45,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:47,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:47,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:47,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:48,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:48,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:49,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:49,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:01:49,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:01:49,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:01:49,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:01:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 19:01:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 19:01:49,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:51,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:51,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:51,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:51,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:51,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:51,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:01:51,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:51,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:51,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:51,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:01:51,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:51,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:01:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:51,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:51,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:51,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:51,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:51,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:01:51,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:51,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:01:51,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:51,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:01:51,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:51,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:01:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:51,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:51,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:51,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:51,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:51,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:01:51,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:01:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:01:51,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:51,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:01:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:51,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:51,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:51,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:51,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:51,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:51,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:51,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:51,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:51,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:51,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:51,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:01:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:51,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:51,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:51,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:51,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:51,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:01:51,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:51,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:01:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:51,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:01:51,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 6 proven. 256 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:01:52,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728728310] [2020-10-26 19:01:52,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:52,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:01:52,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762579671] [2020-10-26 19:01:52,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:01:52,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:52,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:01:52,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:01:52,020 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand 37 states. [2020-10-26 19:01:57,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:57,729 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2020-10-26 19:01:57,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-26 19:01:57,729 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-26 19:01:57,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:57,731 INFO L225 Difference]: With dead ends: 179 [2020-10-26 19:01:57,731 INFO L226 Difference]: Without dead ends: 176 [2020-10-26 19:01:57,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=658, Invalid=5042, Unknown=0, NotChecked=0, Total=5700 [2020-10-26 19:01:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-26 19:01:57,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 101. [2020-10-26 19:01:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:01:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-10-26 19:01:57,757 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 82 [2020-10-26 19:01:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:57,757 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-10-26 19:01:57,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:01:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-10-26 19:01:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:01:57,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:57,758 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:57,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:01:57,759 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:57,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1188679426, now seen corresponding path program 21 times [2020-10-26 19:01:57,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:57,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440662429] [2020-10-26 19:01:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:57,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:58,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:58,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:58,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:58,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:59,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:01,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:01,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:02,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:02,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:02,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:02,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:02:02,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:02:02,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:02:02,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:02,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:02:02,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:02,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:02:02,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:04,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:04,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:04,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:04,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:04,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:04,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:02:04,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:04,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:04,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:04,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:04,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:04,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:02:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:04,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:04,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:04,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:04,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:04,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:02:04,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:04,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:04,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:04,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:04,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:04,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:02:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:04,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:04,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:04,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:04,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:04,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:04,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:04,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:04,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:04,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:02:04,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:04,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:02:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:04,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:04,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:04,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:04,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:04,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:02:04,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:04,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:04,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:04,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:04,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:04,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-26 19:02:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:04,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:04,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:04,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:04,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:04,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:04,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:04,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:04,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:04,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:04,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 10 proven. 261 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:02:04,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440662429] [2020-10-26 19:02:04,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:04,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:02:04,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299102948] [2020-10-26 19:02:04,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:02:04,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:04,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:02:04,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:02:04,880 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 33 states.