/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/loop-new/count_by_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:42:49,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:42:49,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:42:49,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:42:49,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:42:49,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:42:49,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:42:49,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:42:49,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:42:49,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:42:49,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:42:49,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:42:49,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:42:49,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:42:49,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:42:49,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:42:49,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:42:49,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:42:49,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:42:49,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:42:49,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:42:49,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:42:49,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:42:49,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:42:49,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:42:49,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:42:49,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:42:49,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:42:49,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:42:49,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:42:49,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:42:49,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:42:49,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:42:49,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:42:49,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:42:49,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:42:49,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:42:49,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:42:49,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:42:49,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:42:49,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:42:49,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:42:49,234 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:42:49,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:42:49,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:42:49,236 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:42:49,236 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:42:49,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:42:49,236 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:42:49,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:42:49,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:42:49,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:42:49,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:42:49,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:42:49,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:42:49,238 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:42:49,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:42:49,238 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:42:49,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:42:49,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:42:49,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:42:49,239 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:42:49,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:42:49,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:42:49,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:42:49,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:42:49,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:42:49,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:42:49,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:42:49,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:42:49,241 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:42:49,241 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:42:49,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:42:49,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:42:49,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:42:49,724 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:42:49,725 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:42:49,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_2.i [2020-10-27 01:42:49,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/767343557/4e83311739914a8ba4b69b26574dcbbc/FLAG2d55cdfd5 [2020-10-27 01:42:50,461 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:42:50,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_2.i [2020-10-27 01:42:50,470 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/767343557/4e83311739914a8ba4b69b26574dcbbc/FLAG2d55cdfd5 [2020-10-27 01:42:50,842 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/767343557/4e83311739914a8ba4b69b26574dcbbc [2020-10-27 01:42:50,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:42:50,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:42:50,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:42:50,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:42:50,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:42:50,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:42:50" (1/1) ... [2020-10-27 01:42:50,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@651cec7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:42:50, skipping insertion in model container [2020-10-27 01:42:50,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:42:50" (1/1) ... [2020-10-27 01:42:50,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:42:50,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:42:51,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:42:51,137 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:42:51,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:42:51,173 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:42:51,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:42:51 WrapperNode [2020-10-27 01:42:51,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:42:51,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:42:51,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:42:51,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:42:51,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:42:51" (1/1) ... [2020-10-27 01:42:51,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:42:51" (1/1) ... [2020-10-27 01:42:51,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:42:51" (1/1) ... [2020-10-27 01:42:51,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:42:51" (1/1) ... [2020-10-27 01:42:51,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:42:51" (1/1) ... [2020-10-27 01:42:51,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:42:51" (1/1) ... [2020-10-27 01:42:51,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:42:51" (1/1) ... [2020-10-27 01:42:51,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:42:51,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:42:51,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:42:51,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:42:51,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:42:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:42:51,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:42:51,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:42:51,332 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:42:51,332 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:42:51,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:42:51,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:42:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:42:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:42:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:42:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:42:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:42:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:42:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:42:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:42:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:42:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:42:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:42:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:42:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:42:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:42:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:42:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:42:51,789 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:42:51,789 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:42:51,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:42:51 BoogieIcfgContainer [2020-10-27 01:42:51,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:42:51,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:42:51,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:42:51,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:42:51,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:42:50" (1/3) ... [2020-10-27 01:42:51,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662df0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:42:51, skipping insertion in model container [2020-10-27 01:42:51,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:42:51" (2/3) ... [2020-10-27 01:42:51,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662df0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:42:51, skipping insertion in model container [2020-10-27 01:42:51,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:42:51" (3/3) ... [2020-10-27 01:42:51,800 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2020-10-27 01:42:51,815 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:42:51,820 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:42:51,836 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:42:51,865 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:42:51,865 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:42:51,891 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:42:51,891 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:42:51,891 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:42:51,892 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:42:51,892 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:42:51,892 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:42:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 01:42:51,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:42:51,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:51,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:51,934 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:51,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1926597601, now seen corresponding path program 1 times [2020-10-27 01:42:51,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:51,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404852526] [2020-10-27 01:42:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:52,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:52,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:52,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:42:52,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:52,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-27 01:42:52,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:52,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:42:52,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:52,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:42:52,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:42:52,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:52,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:52,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:52,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:52,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:52,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 01:42:52,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:52,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:52,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:52,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:52,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:42:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:52,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404852526] [2020-10-27 01:42:52,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:42:52,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:42:52,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550283829] [2020-10-27 01:42:52,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:42:52,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:52,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:42:52,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:42:52,694 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2020-10-27 01:42:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:52,837 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-10-27 01:42:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:42:52,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 01:42:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:52,848 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:42:52,848 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 01:42:52,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:42:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 01:42:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-27 01:42:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:42:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 01:42:52,902 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-10-27 01:42:52,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:52,903 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 01:42:52,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:42:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 01:42:52,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:42:52,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:52,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:52,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:42:52,905 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:52,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:52,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2115061181, now seen corresponding path program 1 times [2020-10-27 01:42:52,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:52,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085644180] [2020-10-27 01:42:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:52,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:53,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:53,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:42:53,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:53,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 01:42:53,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:53,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:42:53,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:53,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:42:53,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:53,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:53,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:53,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:53,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:53,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:53,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:42:53,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:53,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:53,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:53,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:53,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:53,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085644180] [2020-10-27 01:42:53,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:53,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:42:53,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200155344] [2020-10-27 01:42:53,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:42:53,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:53,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:42:53,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:42:53,114 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-10-27 01:42:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:53,252 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 01:42:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:42:53,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-27 01:42:53,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:53,254 INFO L225 Difference]: With dead ends: 26 [2020-10-27 01:42:53,254 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:42:53,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:42:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:42:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-27 01:42:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:42:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 01:42:53,265 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-10-27 01:42:53,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:53,265 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 01:42:53,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:42:53,266 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 01:42:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:42:53,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:53,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:53,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:42:53,267 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:53,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:53,268 INFO L82 PathProgramCache]: Analyzing trace with hash -796252197, now seen corresponding path program 2 times [2020-10-27 01:42:53,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:53,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690891395] [2020-10-27 01:42:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:53,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:53,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:53,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:42:53,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:53,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-27 01:42:53,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:53,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:42:53,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:53,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:42:53,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:53,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:53,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:53,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:53,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:53,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:53,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:42:53,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:53,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:53,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:53,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:53,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:53,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690891395] [2020-10-27 01:42:53,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:53,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:42:53,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252469068] [2020-10-27 01:42:53,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:42:53,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:53,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:42:53,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:42:53,445 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-10-27 01:42:53,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:53,612 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-27 01:42:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:42:53,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 01:42:53,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:53,613 INFO L225 Difference]: With dead ends: 28 [2020-10-27 01:42:53,614 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:42:53,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:42:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:42:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 01:42:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:42:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-27 01:42:53,622 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-10-27 01:42:53,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:53,623 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-27 01:42:53,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:42:53,623 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-27 01:42:53,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:42:53,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:53,624 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:53,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:42:53,624 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1750268537, now seen corresponding path program 3 times [2020-10-27 01:42:53,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:53,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330213267] [2020-10-27 01:42:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:53,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:53,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:53,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:42:53,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:53,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 01:42:53,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:53,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:42:53,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:53,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:42:53,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:53,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:53,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:53,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:53,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:53,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:53,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:42:53,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:53,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:53,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:53,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:53,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:42:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:53,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330213267] [2020-10-27 01:42:53,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:53,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:42:53,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262974782] [2020-10-27 01:42:53,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:42:53,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:53,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:42:53,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:42:53,827 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-10-27 01:42:54,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:54,073 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-27 01:42:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:42:54,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 01:42:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:54,075 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:42:54,075 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:42:54,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:42:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:42:54,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-27 01:42:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:42:54,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-27 01:42:54,082 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-10-27 01:42:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:54,083 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-27 01:42:54,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:42:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-27 01:42:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:42:54,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:54,084 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:54,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:42:54,085 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:54,085 INFO L82 PathProgramCache]: Analyzing trace with hash 825335191, now seen corresponding path program 4 times [2020-10-27 01:42:54,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:54,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944904295] [2020-10-27 01:42:54,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:54,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:54,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:54,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:42:54,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:54,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-27 01:42:54,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:54,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:42:54,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:54,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:42:54,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:54,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:54,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:54,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:54,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:54,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:54,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:42:54,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:54,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:54,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:54,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:54,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944904295] [2020-10-27 01:42:54,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:54,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:42:54,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307311677] [2020-10-27 01:42:54,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:42:54,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:54,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:42:54,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:42:54,264 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2020-10-27 01:42:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:54,469 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 01:42:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:42:54,470 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 01:42:54,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:54,471 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:42:54,471 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:42:54,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:42:54,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:42:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-27 01:42:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 01:42:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-27 01:42:54,479 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-10-27 01:42:54,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:54,479 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-27 01:42:54,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:42:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-27 01:42:54,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:42:54,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:54,480 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:54,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:42:54,481 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:54,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:54,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1022619957, now seen corresponding path program 5 times [2020-10-27 01:42:54,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:54,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672812862] [2020-10-27 01:42:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:54,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:54,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:54,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:42:54,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:54,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 01:42:54,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:54,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:42:54,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:54,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:42:54,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:42:54,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:54,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:54,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:54,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:54,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:54,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:42:54,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:54,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:54,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:54,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:54,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:54,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672812862] [2020-10-27 01:42:54,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:54,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:42:54,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735637013] [2020-10-27 01:42:54,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:42:54,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:54,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:42:54,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:42:54,732 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-10-27 01:42:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:55,019 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 01:42:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:42:55,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 01:42:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:55,021 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:42:55,021 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:42:55,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:42:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:42:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 01:42:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 01:42:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-27 01:42:55,029 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-10-27 01:42:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:55,029 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-27 01:42:55,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:42:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-27 01:42:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:42:55,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:55,030 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:55,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:42:55,031 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:55,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:55,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1634719059, now seen corresponding path program 6 times [2020-10-27 01:42:55,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:55,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192574965] [2020-10-27 01:42:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:55,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:55,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:55,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:42:55,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:55,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 01:42:55,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:55,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:42:55,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:55,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:42:55,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:55,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:55,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:55,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:55,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:55,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:55,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:55,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:55,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:55,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:55,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:55,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192574965] [2020-10-27 01:42:55,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:55,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:42:55,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923066842] [2020-10-27 01:42:55,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:42:55,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:55,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:42:55,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:42:55,242 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2020-10-27 01:42:55,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:55,541 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 01:42:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:42:55,541 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 01:42:55,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:55,542 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:42:55,542 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:42:55,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:42:55,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:42:55,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-27 01:42:55,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:42:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-27 01:42:55,549 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-10-27 01:42:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:55,549 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-27 01:42:55,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:42:55,550 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-27 01:42:55,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:42:55,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:55,551 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:55,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:42:55,551 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:55,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1451436529, now seen corresponding path program 7 times [2020-10-27 01:42:55,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:55,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200150093] [2020-10-27 01:42:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:55,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:55,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:55,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:42:55,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:55,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 01:42:55,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:42:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:42:55,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:55,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:55,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:55,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:55,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:55,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:55,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:55,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:55,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:55,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:55,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:55,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:55,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200150093] [2020-10-27 01:42:55,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:55,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:42:55,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465717014] [2020-10-27 01:42:55,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:42:55,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:55,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:42:55,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:42:55,768 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 11 states. [2020-10-27 01:42:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:56,088 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 01:42:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:42:56,089 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-27 01:42:56,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:56,090 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:42:56,090 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:42:56,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:42:56,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:42:56,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 01:42:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:42:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-27 01:42:56,097 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-10-27 01:42:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:56,097 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-27 01:42:56,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:42:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-27 01:42:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:42:56,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:56,098 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:56,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:42:56,099 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:56,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1410584335, now seen corresponding path program 8 times [2020-10-27 01:42:56,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:56,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278641013] [2020-10-27 01:42:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:56,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:56,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:56,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:42:56,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:56,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-27 01:42:56,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:42:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:42:56,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:42:56,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:56,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:56,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:56,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:56,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:56,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:56,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:56,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:56,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:56,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:56,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:56,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278641013] [2020-10-27 01:42:56,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:56,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:56,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154146525] [2020-10-27 01:42:56,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:56,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:56,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:56,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:56,329 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 12 states. [2020-10-27 01:42:56,651 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-10-27 01:42:56,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:56,843 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 01:42:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:56,844 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-27 01:42:56,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:56,845 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:42:56,845 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:42:56,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:42:56,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:42:56,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 01:42:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:42:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-27 01:42:56,854 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-10-27 01:42:56,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:56,854 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-27 01:42:56,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:56,854 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-27 01:42:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:42:56,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:56,855 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:56,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:42:56,856 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:56,856 INFO L82 PathProgramCache]: Analyzing trace with hash 806331565, now seen corresponding path program 9 times [2020-10-27 01:42:56,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:56,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197897937] [2020-10-27 01:42:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:56,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:56,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:56,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:42:56,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:56,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 01:42:56,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:56,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:42:56,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:56,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:42:56,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:57,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:57,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:57,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:57,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:57,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:57,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:42:57,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:57,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:57,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:57,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:57,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:57,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197897937] [2020-10-27 01:42:57,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:57,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:42:57,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112687755] [2020-10-27 01:42:57,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:42:57,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:57,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:42:57,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:42:57,143 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 13 states. [2020-10-27 01:42:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:57,564 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-27 01:42:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:42:57,565 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-27 01:42:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:57,565 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:42:57,565 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:42:57,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:42:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:42:57,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-27 01:42:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:42:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-27 01:42:57,573 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2020-10-27 01:42:57,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:57,573 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-27 01:42:57,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:42:57,573 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-27 01:42:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:42:57,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:57,574 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:57,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:42:57,575 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:57,575 INFO L82 PathProgramCache]: Analyzing trace with hash -59995445, now seen corresponding path program 10 times [2020-10-27 01:42:57,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:57,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038696884] [2020-10-27 01:42:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:57,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:57,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:57,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:42:57,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:57,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-27 01:42:57,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:42:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:57,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:42:57,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:57,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:57,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:57,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:57,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:57,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:57,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:42:57,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:57,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:57,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:57,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:57,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:57,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038696884] [2020-10-27 01:42:57,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:57,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:42:57,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225229769] [2020-10-27 01:42:57,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:42:57,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:57,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:42:57,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:42:57,969 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 14 states. [2020-10-27 01:42:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:58,494 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-27 01:42:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:42:58,495 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-27 01:42:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:58,495 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:42:58,496 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:42:58,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:42:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:42:58,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-27 01:42:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:42:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-27 01:42:58,514 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2020-10-27 01:42:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:58,514 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-27 01:42:58,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:42:58,514 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-27 01:42:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:42:58,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:58,515 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:58,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:42:58,515 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:58,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:58,516 INFO L82 PathProgramCache]: Analyzing trace with hash 623403369, now seen corresponding path program 11 times [2020-10-27 01:42:58,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:58,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360506987] [2020-10-27 01:42:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:58,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:58,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:58,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:42:58,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:58,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 01:42:58,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:58,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:42:58,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:58,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:42:58,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:58,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:58,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:58,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:58,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:58,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:58,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:42:58,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:58,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:58,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:58,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:58,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:58,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360506987] [2020-10-27 01:42:58,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:58,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:42:58,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787649276] [2020-10-27 01:42:58,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:42:58,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:58,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:42:58,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:42:58,848 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 15 states. [2020-10-27 01:42:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:59,409 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 01:42:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:42:59,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-27 01:42:59,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:59,412 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:42:59,412 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:42:59,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:42:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:42:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-27 01:42:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:42:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-27 01:42:59,424 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2020-10-27 01:42:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:59,425 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-27 01:42:59,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:42:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-27 01:42:59,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:42:59,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:59,430 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:59,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:42:59,430 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:59,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:59,431 INFO L82 PathProgramCache]: Analyzing trace with hash 239667335, now seen corresponding path program 12 times [2020-10-27 01:42:59,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:59,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361333755] [2020-10-27 01:42:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:59,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:59,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:59,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:42:59,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:59,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-27 01:42:59,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:42:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:42:59,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:59,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:59,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:59,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:59,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:59,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:59,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:42:59,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:59,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:59,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:59,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:59,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:59,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361333755] [2020-10-27 01:42:59,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:59,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:42:59,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566045063] [2020-10-27 01:42:59,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:42:59,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:59,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:42:59,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:42:59,856 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 16 states. [2020-10-27 01:43:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:00,443 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-27 01:43:00,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:43:00,443 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-27 01:43:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:00,445 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:43:00,445 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:43:00,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:43:00,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:43:00,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-27 01:43:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:43:00,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-27 01:43:00,453 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2020-10-27 01:43:00,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:00,453 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-27 01:43:00,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:43:00,453 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-27 01:43:00,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:43:00,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:00,454 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:00,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:43:00,455 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:00,455 INFO L82 PathProgramCache]: Analyzing trace with hash 836526117, now seen corresponding path program 13 times [2020-10-27 01:43:00,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:00,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291926550] [2020-10-27 01:43:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:00,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:00,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:00,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:43:00,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:00,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 01:43:00,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:00,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:43:00,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:00,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:43:00,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:00,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:00,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:00,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:00,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:00,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:00,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:43:00,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:00,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:00,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:00,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:00,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:00,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291926550] [2020-10-27 01:43:00,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:00,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:43:00,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23658514] [2020-10-27 01:43:00,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:43:00,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:00,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:43:00,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:43:00,813 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 17 states. [2020-10-27 01:43:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:01,495 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-27 01:43:01,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:43:01,495 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-27 01:43:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:01,497 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:43:01,497 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:43:01,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:43:01,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:43:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-27 01:43:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:43:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-27 01:43:01,515 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2020-10-27 01:43:01,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:01,515 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-27 01:43:01,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:43:01,515 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-27 01:43:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:43:01,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:01,518 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:01,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:43:01,519 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:01,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1107802045, now seen corresponding path program 14 times [2020-10-27 01:43:01,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:01,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496062899] [2020-10-27 01:43:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:01,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:01,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:01,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:43:01,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:01,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 01:43:01,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:01,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:43:01,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:01,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:43:01,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:01,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:01,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:01,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:01,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:01,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:01,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:43:01,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:01,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:01,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:01,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:01,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:01,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496062899] [2020-10-27 01:43:01,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:01,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:43:01,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451302977] [2020-10-27 01:43:01,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:43:01,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:01,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:43:01,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:43:01,969 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 18 states. [2020-10-27 01:43:02,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:02,692 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 01:43:02,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:43:02,693 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-27 01:43:02,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:02,694 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:43:02,694 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:43:02,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:43:02,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:43:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-27 01:43:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:43:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-27 01:43:02,703 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2020-10-27 01:43:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:02,703 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-27 01:43:02,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:43:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-27 01:43:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:43:02,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:02,704 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:02,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:43:02,704 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:02,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:02,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1296391967, now seen corresponding path program 15 times [2020-10-27 01:43:02,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:02,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937051681] [2020-10-27 01:43:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:02,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:02,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:02,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:43:02,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:02,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-27 01:43:02,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:02,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:43:02,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:02,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 01:43:02,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:03,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:03,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:03,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:03,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:03,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:03,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:03,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:03,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:03,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937051681] [2020-10-27 01:43:03,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:03,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:43:03,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339716694] [2020-10-27 01:43:03,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:43:03,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:03,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:43:03,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:43:03,125 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 19 states. [2020-10-27 01:43:03,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:03,858 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-27 01:43:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:43:03,860 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-27 01:43:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:03,861 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:43:03,861 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:43:03,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:43:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:43:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 01:43:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:43:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-27 01:43:03,880 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2020-10-27 01:43:03,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:03,880 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-27 01:43:03,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:43:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-27 01:43:03,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:43:03,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:03,886 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:03,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:43:03,886 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:03,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:03,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2142680577, now seen corresponding path program 16 times [2020-10-27 01:43:03,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:03,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83482398] [2020-10-27 01:43:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:03,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:04,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:04,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:43:04,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:04,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-27 01:43:04,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:04,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:43:04,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:04,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:43:04,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:04,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:04,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:04,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:04,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:04,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:04,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:43:04,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:04,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:04,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:04,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:04,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:04,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83482398] [2020-10-27 01:43:04,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:04,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:43:04,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711532324] [2020-10-27 01:43:04,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:43:04,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:04,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:43:04,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:43:04,433 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 20 states. [2020-10-27 01:43:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:05,225 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-27 01:43:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:43:05,226 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-27 01:43:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:05,227 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:43:05,227 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:43:05,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:43:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:43:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-27 01:43:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:43:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-27 01:43:05,243 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2020-10-27 01:43:05,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:05,243 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-27 01:43:05,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:43:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-27 01:43:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:43:05,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:05,244 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:05,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:43:05,245 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:05,246 INFO L82 PathProgramCache]: Analyzing trace with hash 617751453, now seen corresponding path program 17 times [2020-10-27 01:43:05,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:05,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177186064] [2020-10-27 01:43:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:05,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:05,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:05,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:43:05,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:05,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-27 01:43:05,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:05,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:43:05,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:05,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:43:05,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:05,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:05,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:05,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:05,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:05,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:05,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:43:05,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:05,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:05,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:05,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:05,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:05,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177186064] [2020-10-27 01:43:05,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:05,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:43:05,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597036311] [2020-10-27 01:43:05,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:43:05,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:05,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:43:05,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:43:05,806 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 21 states. [2020-10-27 01:43:06,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:06,652 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 01:43:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:43:06,652 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-27 01:43:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:06,653 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:43:06,654 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:43:06,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:43:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:43:06,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-27 01:43:06,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:43:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-27 01:43:06,662 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2020-10-27 01:43:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:06,663 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-27 01:43:06,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:43:06,663 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-27 01:43:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:43:06,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:06,664 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:06,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:43:06,664 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:06,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:06,665 INFO L82 PathProgramCache]: Analyzing trace with hash -896856645, now seen corresponding path program 18 times [2020-10-27 01:43:06,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:06,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400012957] [2020-10-27 01:43:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:06,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:06,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:06,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 01:43:06,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:06,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 01:43:06,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:06,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:43:06,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:06,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:43:06,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:07,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:07,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:07,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:07,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:07,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:07,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:43:07,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:07,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:07,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:07,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:07,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:07,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400012957] [2020-10-27 01:43:07,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:07,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:43:07,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394235137] [2020-10-27 01:43:07,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:43:07,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:07,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:43:07,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:43:07,181 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 22 states. [2020-10-27 01:43:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:08,077 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-27 01:43:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:43:08,077 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-27 01:43:08,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:08,078 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:43:08,078 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:43:08,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:43:08,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:43:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-27 01:43:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:43:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-27 01:43:08,088 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2020-10-27 01:43:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:08,089 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-27 01:43:08,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:43:08,089 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-27 01:43:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:43:08,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:08,090 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:08,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:43:08,090 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:08,091 INFO L82 PathProgramCache]: Analyzing trace with hash -441325479, now seen corresponding path program 19 times [2020-10-27 01:43:08,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:08,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673793363] [2020-10-27 01:43:08,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:08,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:08,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:08,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:43:08,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:08,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-27 01:43:08,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:43:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:08,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:43:08,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:08,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:08,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:08,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:08,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:08,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:08,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:08,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:08,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:08,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:08,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:08,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:08,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673793363] [2020-10-27 01:43:08,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:08,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:43:08,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953588262] [2020-10-27 01:43:08,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:43:08,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:08,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:43:08,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:43:08,713 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 23 states. [2020-10-27 01:43:09,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:09,683 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-27 01:43:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:43:09,684 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-27 01:43:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:09,685 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:43:09,685 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:43:09,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:43:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:43:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-27 01:43:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:43:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-27 01:43:09,694 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2020-10-27 01:43:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:09,694 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-27 01:43:09,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:43:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-27 01:43:09,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:43:09,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:09,695 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:09,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:43:09,698 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:09,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:09,698 INFO L82 PathProgramCache]: Analyzing trace with hash -762539145, now seen corresponding path program 20 times [2020-10-27 01:43:09,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:09,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051667462] [2020-10-27 01:43:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:09,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:09,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:09,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:43:09,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:09,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-27 01:43:09,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:09,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:43:09,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:09,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:43:09,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:10,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:10,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:10,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:10,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:10,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:10,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:10,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:10,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:10,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:10,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:10,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:10,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051667462] [2020-10-27 01:43:10,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:10,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:43:10,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768411011] [2020-10-27 01:43:10,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:43:10,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:10,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:43:10,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:43:10,402 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 24 states. [2020-10-27 01:43:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:11,436 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-27 01:43:11,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:43:11,438 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-27 01:43:11,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:11,439 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:43:11,439 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:43:11,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:43:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:43:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-27 01:43:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 01:43:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-27 01:43:11,457 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2020-10-27 01:43:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:11,457 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-27 01:43:11,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:43:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-27 01:43:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:43:11,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:11,458 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:11,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:43:11,458 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:11,459 INFO L82 PathProgramCache]: Analyzing trace with hash -211226859, now seen corresponding path program 21 times [2020-10-27 01:43:11,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:11,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784129215] [2020-10-27 01:43:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:11,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:11,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:11,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:43:11,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:11,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-27 01:43:11,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:11,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:43:11,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:11,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 01:43:11,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:12,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:12,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:12,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:12,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:12,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:12,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:12,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:12,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:12,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:12,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:12,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:12,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784129215] [2020-10-27 01:43:12,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:12,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:43:12,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384591378] [2020-10-27 01:43:12,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:43:12,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:12,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:43:12,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:43:12,176 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 25 states. [2020-10-27 01:43:13,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:13,236 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-27 01:43:13,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:43:13,236 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-27 01:43:13,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:13,237 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:43:13,237 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:43:13,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:43:13,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:43:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 01:43:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:43:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-27 01:43:13,245 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2020-10-27 01:43:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:13,245 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-27 01:43:13,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:43:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-27 01:43:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:43:13,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:13,246 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:13,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:43:13,246 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:13,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:13,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1318902579, now seen corresponding path program 22 times [2020-10-27 01:43:13,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:13,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979677115] [2020-10-27 01:43:13,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:13,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:13,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:13,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:43:13,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:13,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 01:43:13,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:43:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:43:13,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:13,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:13,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:14,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:14,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:14,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:14,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:14,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:14,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:14,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:14,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:14,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:14,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979677115] [2020-10-27 01:43:14,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:14,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:43:14,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546342164] [2020-10-27 01:43:14,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:43:14,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:14,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:43:14,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:43:14,012 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 26 states. [2020-10-27 01:43:15,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:15,169 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-27 01:43:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:43:15,171 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-27 01:43:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:15,172 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:43:15,172 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:43:15,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:43:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:43:15,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-27 01:43:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 01:43:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-27 01:43:15,179 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2020-10-27 01:43:15,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:15,180 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-27 01:43:15,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:43:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-27 01:43:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:43:15,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:15,181 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:15,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:43:15,181 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:15,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:15,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1400490031, now seen corresponding path program 23 times [2020-10-27 01:43:15,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:15,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070982094] [2020-10-27 01:43:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:15,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:15,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:15,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:43:15,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:15,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-27 01:43:15,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:43:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:43:15,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:15,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:15,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:15,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:15,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:15,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:15,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:15,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:15,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:15,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:15,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:15,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:15,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070982094] [2020-10-27 01:43:15,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:15,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:43:15,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210161946] [2020-10-27 01:43:15,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:43:15,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:15,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:43:15,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:43:15,959 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 27 states. [2020-10-27 01:43:17,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:17,180 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-27 01:43:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:43:17,181 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-10-27 01:43:17,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:17,182 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:43:17,182 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 01:43:17,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:43:17,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 01:43:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-27 01:43:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:43:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-27 01:43:17,189 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2020-10-27 01:43:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:17,189 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-27 01:43:17,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:43:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-27 01:43:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:43:17,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:17,190 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:17,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:43:17,190 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:17,191 INFO L82 PathProgramCache]: Analyzing trace with hash 898295023, now seen corresponding path program 24 times [2020-10-27 01:43:17,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:17,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154985471] [2020-10-27 01:43:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:17,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:17,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:17,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:43:17,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:17,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-27 01:43:17,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:43:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:43:17,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:17,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:17,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:17,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:17,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:17,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:17,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:43:17,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:17,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:17,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154985471] [2020-10-27 01:43:17,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:17,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:43:17,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850874405] [2020-10-27 01:43:17,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:43:17,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:17,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:43:17,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:43:17,982 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 28 states. [2020-10-27 01:43:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:19,315 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-27 01:43:19,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:43:19,315 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-10-27 01:43:19,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:19,317 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:43:19,317 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 01:43:19,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:43:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 01:43:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-27 01:43:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:43:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-10-27 01:43:19,324 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2020-10-27 01:43:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:19,324 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-10-27 01:43:19,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:43:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-10-27 01:43:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:43:19,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:19,325 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:19,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:43:19,325 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:19,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1877425523, now seen corresponding path program 25 times [2020-10-27 01:43:19,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:19,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912336762] [2020-10-27 01:43:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:19,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:19,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:19,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:43:19,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:19,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-27 01:43:19,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:19,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:43:19,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:19,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:43:19,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:20,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:20,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:20,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:20,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:20,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:20,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:43:20,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:20,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:20,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:20,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:20,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:20,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912336762] [2020-10-27 01:43:20,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:20,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:43:20,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114270596] [2020-10-27 01:43:20,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:43:20,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:20,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:43:20,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:43:20,164 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 29 states. [2020-10-27 01:43:21,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:21,547 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-27 01:43:21,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:43:21,547 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-10-27 01:43:21,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:21,548 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:43:21,548 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:43:21,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:43:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:43:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-27 01:43:21,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 01:43:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-10-27 01:43:21,555 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2020-10-27 01:43:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:21,555 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-10-27 01:43:21,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:43:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-10-27 01:43:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:43:21,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:21,557 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:21,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:43:21,557 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:21,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:21,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2124787883, now seen corresponding path program 26 times [2020-10-27 01:43:21,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:21,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090565105] [2020-10-27 01:43:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:21,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:21,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:21,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:43:21,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:21,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-27 01:43:21,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:21,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:43:21,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:21,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:43:21,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:22,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:22,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:22,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:22,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:22,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:22,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:22,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:22,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:22,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:22,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:22,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:43:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:22,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090565105] [2020-10-27 01:43:22,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:22,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:43:22,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142666475] [2020-10-27 01:43:22,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:43:22,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:22,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:43:22,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:43:22,433 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 30 states. [2020-10-27 01:43:23,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:23,915 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-27 01:43:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:43:23,917 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 65 [2020-10-27 01:43:23,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:23,918 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:43:23,918 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:43:23,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:43:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:43:23,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-27 01:43:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 01:43:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-10-27 01:43:23,927 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2020-10-27 01:43:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:23,927 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-10-27 01:43:23,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:43:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-10-27 01:43:23,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:43:23,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:23,928 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:23,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:43:23,928 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:23,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash -38826167, now seen corresponding path program 27 times [2020-10-27 01:43:23,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:23,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141626456] [2020-10-27 01:43:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:23,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:24,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:24,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:43:24,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:24,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-27 01:43:24,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:24,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:43:24,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:24,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:43:24,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:24,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:24,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:24,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:24,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:24,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:24,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:24,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:24,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:24,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:24,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:24,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:24,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141626456] [2020-10-27 01:43:24,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:24,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:43:24,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357710821] [2020-10-27 01:43:24,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:43:24,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:24,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:43:24,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:43:24,867 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 31 states. [2020-10-27 01:43:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:26,400 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-27 01:43:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:43:26,400 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2020-10-27 01:43:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:26,401 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:43:26,401 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:43:26,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:43:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:43:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-27 01:43:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 01:43:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-10-27 01:43:26,412 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2020-10-27 01:43:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:26,415 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-10-27 01:43:26,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:43:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-10-27 01:43:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:43:26,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:26,416 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:26,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:43:26,416 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:26,417 INFO L82 PathProgramCache]: Analyzing trace with hash -507756953, now seen corresponding path program 28 times [2020-10-27 01:43:26,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:26,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770350273] [2020-10-27 01:43:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:26,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:26,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:26,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:43:26,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:26,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-27 01:43:26,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:26,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:43:26,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:26,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:43:26,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:27,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:27,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:27,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:27,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:27,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:27,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:27,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:27,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:27,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:27,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:27,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:27,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770350273] [2020-10-27 01:43:27,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:27,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:43:27,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99739859] [2020-10-27 01:43:27,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:43:27,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:27,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:43:27,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:43:27,397 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 32 states. [2020-10-27 01:43:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:29,065 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-27 01:43:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:43:29,065 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 69 [2020-10-27 01:43:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:29,066 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:43:29,067 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:43:29,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:43:29,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:43:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-27 01:43:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:43:29,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-10-27 01:43:29,074 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2020-10-27 01:43:29,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:29,074 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-10-27 01:43:29,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:43:29,075 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-10-27 01:43:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:43:29,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:29,076 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:29,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:43:29,076 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash -178676219, now seen corresponding path program 29 times [2020-10-27 01:43:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:29,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517154769] [2020-10-27 01:43:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:29,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:29,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:29,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:43:29,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:29,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-27 01:43:29,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:29,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:43:29,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:29,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:43:29,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:30,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:30,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:30,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:30,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:30,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:30,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:30,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:30,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:30,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:30,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:30,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:30,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517154769] [2020-10-27 01:43:30,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:30,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:43:30,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322037444] [2020-10-27 01:43:30,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:43:30,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:30,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:43:30,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:43:30,240 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 33 states. [2020-10-27 01:43:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:32,052 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-27 01:43:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:43:32,053 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 71 [2020-10-27 01:43:32,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:32,054 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:43:32,054 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:43:32,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:43:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:43:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-27 01:43:32,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:43:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-10-27 01:43:32,062 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2020-10-27 01:43:32,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:32,063 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-10-27 01:43:32,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:43:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-10-27 01:43:32,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:43:32,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:32,064 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:32,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:43:32,064 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:32,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:32,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1759670749, now seen corresponding path program 30 times [2020-10-27 01:43:32,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:32,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059425672] [2020-10-27 01:43:32,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:32,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:32,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:32,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 01:43:32,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:32,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-27 01:43:32,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:32,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:43:32,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:32,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:43:32,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:33,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:33,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:33,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:33,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:33,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:33,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:33,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:33,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:33,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:33,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:33,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:33,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059425672] [2020-10-27 01:43:33,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:33,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:43:33,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982358234] [2020-10-27 01:43:33,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:43:33,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:33,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:43:33,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:43:33,239 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 34 states. [2020-10-27 01:43:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:34,998 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-27 01:43:34,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:43:35,000 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2020-10-27 01:43:35,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:35,001 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:43:35,001 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 01:43:35,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:43:35,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 01:43:35,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-27 01:43:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 01:43:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-10-27 01:43:35,007 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2020-10-27 01:43:35,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:35,007 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-10-27 01:43:35,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:43:35,007 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-10-27 01:43:35,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 01:43:35,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:35,008 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:35,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:43:35,008 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:35,009 INFO L82 PathProgramCache]: Analyzing trace with hash -676991295, now seen corresponding path program 31 times [2020-10-27 01:43:35,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:35,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314587857] [2020-10-27 01:43:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:35,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:35,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:35,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 01:43:35,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:35,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-27 01:43:35,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:35,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:43:35,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:35,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:43:35,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:43:36,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:36,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:36,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:36,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:36,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:36,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:43:36,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:36,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:36,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:36,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:36,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:36,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314587857] [2020-10-27 01:43:36,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:36,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:43:36,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465641926] [2020-10-27 01:43:36,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:43:36,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:36,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:43:36,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:43:36,244 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 35 states. [2020-10-27 01:43:38,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:38,117 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-10-27 01:43:38,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:43:38,117 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 75 [2020-10-27 01:43:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:38,119 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:43:38,119 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:43:38,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:43:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:43:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-27 01:43:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:43:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-10-27 01:43:38,127 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2020-10-27 01:43:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:38,128 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-10-27 01:43:38,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:43:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-10-27 01:43:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 01:43:38,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:38,129 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:38,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:43:38,129 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:38,129 INFO L82 PathProgramCache]: Analyzing trace with hash 395878367, now seen corresponding path program 32 times [2020-10-27 01:43:38,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:38,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786334341] [2020-10-27 01:43:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:38,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:38,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:38,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 01:43:38,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:38,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-27 01:43:38,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:38,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:43:38,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:38,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:43:38,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:39,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:39,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:39,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:39,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:39,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:39,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:43:39,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:39,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:39,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786334341] [2020-10-27 01:43:39,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:39,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:43:39,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391735331] [2020-10-27 01:43:39,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:43:39,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:39,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:43:39,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:43:39,402 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 36 states. [2020-10-27 01:43:41,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:41,468 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-27 01:43:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:43:41,469 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 77 [2020-10-27 01:43:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:41,470 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:43:41,470 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:43:41,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:43:41,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:43:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-27 01:43:41,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 01:43:41,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-10-27 01:43:41,481 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2020-10-27 01:43:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:41,481 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-10-27 01:43:41,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:43:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-10-27 01:43:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 01:43:41,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:41,482 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:41,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:43:41,482 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:41,483 INFO L82 PathProgramCache]: Analyzing trace with hash 631472509, now seen corresponding path program 33 times [2020-10-27 01:43:41,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:41,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861299944] [2020-10-27 01:43:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:41,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:41,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:41,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 01:43:41,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:41,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-27 01:43:41,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:41,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:43:41,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:41,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:43:41,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:42,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:42,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:42,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:42,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:42,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:42,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:42,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:42,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:42,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861299944] [2020-10-27 01:43:42,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:42,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:43:42,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914532678] [2020-10-27 01:43:42,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:43:42,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:42,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:43:42,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:43:42,833 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 37 states. [2020-10-27 01:43:44,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:44,778 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-27 01:43:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:43:44,779 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 79 [2020-10-27 01:43:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:44,780 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:43:44,780 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:43:44,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:43:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:43:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-27 01:43:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 01:43:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-10-27 01:43:44,787 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2020-10-27 01:43:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:44,787 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-10-27 01:43:44,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:43:44,787 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-10-27 01:43:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 01:43:44,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:44,788 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:44,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:43:44,788 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:44,788 INFO L82 PathProgramCache]: Analyzing trace with hash -595823717, now seen corresponding path program 34 times [2020-10-27 01:43:44,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:44,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139661501] [2020-10-27 01:43:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:44,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:45,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:45,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 01:43:45,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:45,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-10-27 01:43:45,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:43:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 01:43:45,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:46,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:46,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:46,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:46,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:46,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:46,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:46,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:46,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:46,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:46,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:46,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:46,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139661501] [2020-10-27 01:43:46,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:46,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:43:46,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920670599] [2020-10-27 01:43:46,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:43:46,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:46,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:43:46,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:43:46,297 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 38 states. [2020-10-27 01:43:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:48,570 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-27 01:43:48,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:43:48,571 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 81 [2020-10-27 01:43:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:48,572 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:43:48,572 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:43:48,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:43:48,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:43:48,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-27 01:43:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:43:48,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-10-27 01:43:48,579 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2020-10-27 01:43:48,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:48,579 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-10-27 01:43:48,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:43:48,580 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-10-27 01:43:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 01:43:48,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:48,580 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:48,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:43:48,581 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:48,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1088509497, now seen corresponding path program 35 times [2020-10-27 01:43:48,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:48,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833124606] [2020-10-27 01:43:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:48,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:48,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:48,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 01:43:48,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:48,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-27 01:43:48,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:48,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:43:48,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:48,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 01:43:48,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:49,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:49,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:49,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:49,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:49,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:49,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:49,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:49,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:49,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:49,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:49,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:49,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833124606] [2020-10-27 01:43:49,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:49,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:43:49,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625496589] [2020-10-27 01:43:49,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:43:49,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:49,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:43:49,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:43:49,975 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 39 states. [2020-10-27 01:43:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:52,338 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-27 01:43:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:43:52,339 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-10-27 01:43:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:52,340 INFO L225 Difference]: With dead ends: 94 [2020-10-27 01:43:52,340 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:43:52,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:43:52,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:43:52,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-27 01:43:52,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 01:43:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-10-27 01:43:52,345 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2020-10-27 01:43:52,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:52,345 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-10-27 01:43:52,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:43:52,346 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-10-27 01:43:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 01:43:52,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:52,346 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:52,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:43:52,347 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:52,347 INFO L82 PathProgramCache]: Analyzing trace with hash 530057559, now seen corresponding path program 36 times [2020-10-27 01:43:52,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:52,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949532893] [2020-10-27 01:43:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:52,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:52,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:52,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 01:43:52,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:52,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-27 01:43:52,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:52,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:43:52,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 01:43:52,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:53,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:53,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:53,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:53,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:53,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:53,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:53,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:53,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:53,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:53,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:53,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:53,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949532893] [2020-10-27 01:43:53,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:53,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:43:53,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699383025] [2020-10-27 01:43:53,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:43:53,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:53,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:43:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:43:53,887 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 40 states. [2020-10-27 01:43:56,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:56,103 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-27 01:43:56,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:43:56,104 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 85 [2020-10-27 01:43:56,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:56,105 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:43:56,105 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:43:56,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:43:56,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:43:56,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-27 01:43:56,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 01:43:56,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-10-27 01:43:56,113 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2020-10-27 01:43:56,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:56,113 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-10-27 01:43:56,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:43:56,113 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-10-27 01:43:56,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 01:43:56,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:56,114 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:56,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:43:56,114 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:56,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:56,115 INFO L82 PathProgramCache]: Analyzing trace with hash 728657141, now seen corresponding path program 37 times [2020-10-27 01:43:56,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:56,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288034106] [2020-10-27 01:43:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:56,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:56,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:56,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 01:43:56,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:56,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-27 01:43:56,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:56,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:43:56,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:56,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 01:43:56,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:57,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:57,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:57,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:57,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:57,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:57,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:57,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:57,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:57,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:57,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:57,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:57,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288034106] [2020-10-27 01:43:57,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:57,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:43:57,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431075660] [2020-10-27 01:43:57,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:43:57,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:57,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:43:57,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:43:57,714 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 41 states. [2020-10-27 01:44:00,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:00,231 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-27 01:44:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:44:00,231 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 87 [2020-10-27 01:44:00,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:00,233 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:44:00,233 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 01:44:00,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:44:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 01:44:00,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-27 01:44:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 01:44:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2020-10-27 01:44:00,240 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2020-10-27 01:44:00,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:00,240 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2020-10-27 01:44:00,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:44:00,241 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2020-10-27 01:44:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 01:44:00,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:00,241 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:00,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:44:00,241 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:00,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:00,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1690672877, now seen corresponding path program 38 times [2020-10-27 01:44:00,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:00,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863287171] [2020-10-27 01:44:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:00,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:00,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:00,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 01:44:00,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:00,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-27 01:44:00,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:00,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:44:00,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:00,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 01:44:00,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:01,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:01,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:01,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:01,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:01,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:01,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:01,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:01,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:01,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:01,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:01,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:01,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863287171] [2020-10-27 01:44:01,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:01,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:44:01,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637327709] [2020-10-27 01:44:01,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:44:01,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:01,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:44:01,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:44:01,911 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 42 states. [2020-10-27 01:44:04,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:04,616 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-27 01:44:04,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:44:04,617 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 89 [2020-10-27 01:44:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:04,619 INFO L225 Difference]: With dead ends: 100 [2020-10-27 01:44:04,619 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:44:04,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:44:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:44:04,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-27 01:44:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:44:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-10-27 01:44:04,627 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2020-10-27 01:44:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:04,627 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-10-27 01:44:04,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:44:04,627 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-10-27 01:44:04,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 01:44:04,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:04,628 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:04,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:44:04,628 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:04,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:04,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1205454257, now seen corresponding path program 39 times [2020-10-27 01:44:04,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:04,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523039336] [2020-10-27 01:44:04,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:04,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:04,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:04,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 01:44:04,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:04,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-27 01:44:04,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:44:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 01:44:04,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:06,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:06,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:06,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:06,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:06,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:06,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:44:06,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:06,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:06,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:06,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:06,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:06,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523039336] [2020-10-27 01:44:06,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:06,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:44:06,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659253146] [2020-10-27 01:44:06,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:44:06,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:06,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:44:06,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:44:06,164 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 43 states. [2020-10-27 01:44:08,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:08,731 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-10-27 01:44:08,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:44:08,731 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 91 [2020-10-27 01:44:08,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:08,733 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:44:08,733 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:44:08,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:44:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:44:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-27 01:44:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 01:44:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2020-10-27 01:44:08,743 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2020-10-27 01:44:08,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:08,744 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2020-10-27 01:44:08,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:44:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2020-10-27 01:44:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 01:44:08,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:08,745 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:08,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:44:08,745 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:08,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1244822223, now seen corresponding path program 40 times [2020-10-27 01:44:08,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:08,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234081338] [2020-10-27 01:44:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:08,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:09,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:09,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 01:44:09,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:09,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-27 01:44:09,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:09,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:44:09,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:09,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 01:44:09,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:10,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:10,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:10,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:10,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:10,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:10,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:10,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:10,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:10,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:10,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:10,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:10,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234081338] [2020-10-27 01:44:10,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:10,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:44:10,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950487848] [2020-10-27 01:44:10,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:44:10,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:10,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:44:10,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:44:10,413 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 44 states. [2020-10-27 01:44:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:13,278 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-27 01:44:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:44:13,278 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 93 [2020-10-27 01:44:13,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:13,280 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:44:13,280 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:44:13,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:44:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:44:13,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-27 01:44:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:44:13,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-10-27 01:44:13,287 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2020-10-27 01:44:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:13,288 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-10-27 01:44:13,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:44:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-10-27 01:44:13,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 01:44:13,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:13,289 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:13,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:44:13,289 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:13,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:13,290 INFO L82 PathProgramCache]: Analyzing trace with hash 422731885, now seen corresponding path program 41 times [2020-10-27 01:44:13,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:13,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873046489] [2020-10-27 01:44:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:13,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:13,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:13,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 01:44:13,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:13,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-27 01:44:13,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:44:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:13,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 01:44:13,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:15,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:15,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:15,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:15,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:15,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:15,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:15,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:15,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:15,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:15,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:15,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:15,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873046489] [2020-10-27 01:44:15,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:15,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:44:15,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264856550] [2020-10-27 01:44:15,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:44:15,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:15,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:44:15,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:44:15,085 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 45 states. [2020-10-27 01:44:18,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:18,067 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-10-27 01:44:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:44:18,067 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 95 [2020-10-27 01:44:18,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:18,069 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:44:18,069 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:44:18,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:44:18,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:44:18,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-27 01:44:18,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 01:44:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2020-10-27 01:44:18,076 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2020-10-27 01:44:18,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:18,077 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2020-10-27 01:44:18,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:44:18,077 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2020-10-27 01:44:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 01:44:18,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:18,078 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:18,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:44:18,078 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash 667899531, now seen corresponding path program 42 times [2020-10-27 01:44:18,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:18,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395893646] [2020-10-27 01:44:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:18,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:18,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:18,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 01:44:18,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:18,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-27 01:44:18,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:18,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:44:18,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:18,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 01:44:18,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:19,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:19,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:19,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:19,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:19,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:19,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:44:19,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:19,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:19,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:19,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:19,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:19,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395893646] [2020-10-27 01:44:19,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:19,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:44:19,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640694579] [2020-10-27 01:44:19,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:44:19,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:19,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:44:19,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:44:19,889 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 46 states. [2020-10-27 01:44:22,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:22,864 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-27 01:44:22,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:44:22,864 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 97 [2020-10-27 01:44:22,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:22,865 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:44:22,865 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:44:22,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:44:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:44:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-27 01:44:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 01:44:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-10-27 01:44:22,874 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2020-10-27 01:44:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:22,874 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-10-27 01:44:22,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:44:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-10-27 01:44:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 01:44:22,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:22,875 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:22,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:44:22,875 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:22,876 INFO L82 PathProgramCache]: Analyzing trace with hash 50806057, now seen corresponding path program 43 times [2020-10-27 01:44:22,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:22,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103722638] [2020-10-27 01:44:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:22,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:23,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:23,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 01:44:23,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:23,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-27 01:44:23,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:23,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:44:23,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:23,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 01:44:23,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:24,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:24,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:24,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:24,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:24,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:24,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:24,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:24,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:24,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:24,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:24,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:24,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103722638] [2020-10-27 01:44:24,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:24,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:44:24,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103416362] [2020-10-27 01:44:24,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:44:24,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:24,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:44:24,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:44:24,857 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 47 states. [2020-10-27 01:44:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:28,088 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-27 01:44:28,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:44:28,088 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 99 [2020-10-27 01:44:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:28,090 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:44:28,090 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:44:28,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 01:44:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:44:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-27 01:44:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:44:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-10-27 01:44:28,099 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2020-10-27 01:44:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:28,100 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-10-27 01:44:28,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:44:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-10-27 01:44:28,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 01:44:28,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:28,101 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:28,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:44:28,101 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:28,101 INFO L82 PathProgramCache]: Analyzing trace with hash -270535609, now seen corresponding path program 44 times [2020-10-27 01:44:28,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:28,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563653461] [2020-10-27 01:44:28,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:28,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:28,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:28,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 01:44:28,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:28,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-27 01:44:28,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:28,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:44:28,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:28,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 01:44:28,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:30,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:30,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:30,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:30,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:30,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:30,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:44:30,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:30,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:30,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:30,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:30,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:30,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563653461] [2020-10-27 01:44:30,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:30,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:44:30,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317477796] [2020-10-27 01:44:30,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:44:30,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:30,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:44:30,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:44:30,210 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 48 states. [2020-10-27 01:44:33,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:33,524 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-27 01:44:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:44:33,525 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 101 [2020-10-27 01:44:33,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:33,526 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:44:33,526 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 01:44:33,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:44:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 01:44:33,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-27 01:44:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:44:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-10-27 01:44:33,534 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2020-10-27 01:44:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:33,534 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-10-27 01:44:33,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:44:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-10-27 01:44:33,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 01:44:33,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:33,535 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:33,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:44:33,536 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:33,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:33,536 INFO L82 PathProgramCache]: Analyzing trace with hash 157768677, now seen corresponding path program 45 times [2020-10-27 01:44:33,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:33,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733013527] [2020-10-27 01:44:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:33,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:33,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:33,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 01:44:33,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:33,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-27 01:44:33,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:44:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 01:44:33,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:35,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:35,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:35,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:35,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:35,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:35,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:35,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:35,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:35,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:35,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:35,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:35,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733013527] [2020-10-27 01:44:35,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:35,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:44:35,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871976382] [2020-10-27 01:44:35,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:44:35,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:35,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:44:35,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:44:35,596 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 49 states. [2020-10-27 01:44:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:38,831 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-10-27 01:44:38,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:44:38,832 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 103 [2020-10-27 01:44:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:38,833 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:44:38,833 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:44:38,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 01:44:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:44:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-27 01:44:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 01:44:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2020-10-27 01:44:38,842 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2020-10-27 01:44:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:38,842 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2020-10-27 01:44:38,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:44:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2020-10-27 01:44:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 01:44:38,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:38,843 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:38,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:44:38,843 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:38,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:38,844 INFO L82 PathProgramCache]: Analyzing trace with hash -558672893, now seen corresponding path program 46 times [2020-10-27 01:44:38,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:38,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370116903] [2020-10-27 01:44:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:38,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:39,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:39,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 01:44:39,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:39,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-27 01:44:39,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:39,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:44:39,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:39,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 01:44:39,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:41,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:41,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:41,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:41,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:41,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:41,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:44:41,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:41,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:41,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:41,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:41,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:41,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370116903] [2020-10-27 01:44:41,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:41,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:44:41,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88670178] [2020-10-27 01:44:41,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:44:41,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:41,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:44:41,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:44:41,096 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 50 states. [2020-10-27 01:44:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:44,568 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-27 01:44:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:44:44,569 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 105 [2020-10-27 01:44:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:44,571 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:44:44,571 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:44:44,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 01:44:44,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:44:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-27 01:44:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 01:44:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-10-27 01:44:44,578 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2020-10-27 01:44:44,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:44,579 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-10-27 01:44:44,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:44:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-10-27 01:44:44,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 01:44:44,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:44,580 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:44,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:44:44,580 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:44,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:44,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1864254303, now seen corresponding path program 47 times [2020-10-27 01:44:44,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:44,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313134225] [2020-10-27 01:44:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:44,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:45,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:45,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 01:44:45,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:45,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-27 01:44:45,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:45,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 01:44:45,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:45,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 01:44:45,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:47,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:47,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:47,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:47,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:47,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:47,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:47,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:47,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:47,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:47,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:47,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:47,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313134225] [2020-10-27 01:44:47,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:47,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 01:44:47,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401465706] [2020-10-27 01:44:47,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 01:44:47,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:47,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 01:44:47,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:44:47,139 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 51 states. [2020-10-27 01:44:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:50,823 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-27 01:44:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 01:44:50,824 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 107 [2020-10-27 01:44:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:50,828 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:44:50,828 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 01:44:50,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 01:44:50,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 01:44:50,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-27 01:44:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 01:44:50,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2020-10-27 01:44:50,837 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2020-10-27 01:44:50,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:50,838 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2020-10-27 01:44:50,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 01:44:50,838 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2020-10-27 01:44:50,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 01:44:50,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:50,838 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:50,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:44:50,839 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:50,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:50,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1897428415, now seen corresponding path program 48 times [2020-10-27 01:44:50,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:50,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889652790] [2020-10-27 01:44:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:50,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:51,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:51,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 01:44:51,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:51,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-27 01:44:51,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:51,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 01:44:51,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:51,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 01:44:51,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:53,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:53,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:53,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:53,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:53,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:53,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:53,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:53,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:53,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:53,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:53,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:53,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889652790] [2020-10-27 01:44:53,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:53,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 01:44:53,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146216778] [2020-10-27 01:44:53,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 01:44:53,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:53,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 01:44:53,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:44:53,303 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 52 states. [2020-10-27 01:44:57,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:57,188 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-27 01:44:57,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 01:44:57,189 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 109 [2020-10-27 01:44:57,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:57,191 INFO L225 Difference]: With dead ends: 120 [2020-10-27 01:44:57,191 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 01:44:57,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 01:44:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 01:44:57,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-27 01:44:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 01:44:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-10-27 01:44:57,198 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2020-10-27 01:44:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:57,199 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-10-27 01:44:57,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 01:44:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-10-27 01:44:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 01:44:57,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:57,200 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:57,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:44:57,200 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:57,200 INFO L82 PathProgramCache]: Analyzing trace with hash 512057181, now seen corresponding path program 49 times [2020-10-27 01:44:57,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:57,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378438896] [2020-10-27 01:44:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:57,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:57,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:57,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 01:44:57,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:57,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-27 01:44:57,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 01:44:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 01:44:57,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:59,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:59,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:59,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:59,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:59,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:59,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:59,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:59,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:59,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:59,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:59,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:44:59,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378438896] [2020-10-27 01:44:59,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:59,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 01:44:59,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846508475] [2020-10-27 01:44:59,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 01:44:59,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:59,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 01:44:59,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:44:59,620 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 53 states. [2020-10-27 01:45:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:03,659 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-10-27 01:45:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 01:45:03,660 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 111 [2020-10-27 01:45:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:03,661 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:45:03,662 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:45:03,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 01:45:03,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:45:03,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-27 01:45:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 01:45:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2020-10-27 01:45:03,669 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2020-10-27 01:45:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:03,670 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2020-10-27 01:45:03,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 01:45:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2020-10-27 01:45:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 01:45:03,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:03,671 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:03,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:45:03,671 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:03,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:03,671 INFO L82 PathProgramCache]: Analyzing trace with hash 610163067, now seen corresponding path program 50 times [2020-10-27 01:45:03,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:03,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929935861] [2020-10-27 01:45:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:03,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:04,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:04,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 01:45:04,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:04,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-27 01:45:04,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:04,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 01:45:04,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:04,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 01:45:04,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:06,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:06,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:06,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:06,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:06,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:06,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:45:06,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:06,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:06,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:06,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:06,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:06,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929935861] [2020-10-27 01:45:06,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:06,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 01:45:06,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253101989] [2020-10-27 01:45:06,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 01:45:06,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:06,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 01:45:06,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:45:06,362 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 54 states. [2020-10-27 01:45:10,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:10,555 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-27 01:45:10,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 01:45:10,556 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 113 [2020-10-27 01:45:10,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:10,558 INFO L225 Difference]: With dead ends: 124 [2020-10-27 01:45:10,558 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 01:45:10,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-27 01:45:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 01:45:10,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-27 01:45:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 01:45:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-10-27 01:45:10,564 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2020-10-27 01:45:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:10,564 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-10-27 01:45:10,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 01:45:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-10-27 01:45:10,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 01:45:10,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:10,565 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:10,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:45:10,565 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:10,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:10,566 INFO L82 PathProgramCache]: Analyzing trace with hash 400639001, now seen corresponding path program 51 times [2020-10-27 01:45:10,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:10,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977176519] [2020-10-27 01:45:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:10,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:11,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:11,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 01:45:11,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:11,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-27 01:45:11,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:11,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 01:45:11,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:11,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 01:45:11,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:13,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:13,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:13,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:13,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:13,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:13,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:45:13,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:13,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:13,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:13,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:13,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:13,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977176519] [2020-10-27 01:45:13,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:13,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 01:45:13,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411896650] [2020-10-27 01:45:13,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 01:45:13,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:13,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 01:45:13,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:45:13,387 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 55 states. [2020-10-27 01:45:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:17,704 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-10-27 01:45:17,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 01:45:17,705 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 115 [2020-10-27 01:45:17,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:17,706 INFO L225 Difference]: With dead ends: 126 [2020-10-27 01:45:17,706 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:45:17,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-27 01:45:17,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:45:17,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 01:45:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:45:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-10-27 01:45:17,715 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2020-10-27 01:45:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:17,715 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-10-27 01:45:17,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 01:45:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-10-27 01:45:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 01:45:17,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:17,716 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:17,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:45:17,717 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:17,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:17,717 INFO L82 PathProgramCache]: Analyzing trace with hash 911474487, now seen corresponding path program 52 times [2020-10-27 01:45:17,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:17,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279360140] [2020-10-27 01:45:17,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:17,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:18,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:18,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 01:45:18,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:18,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-27 01:45:18,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:18,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 01:45:18,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:18,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 01:45:18,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:20,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:20,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:20,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:20,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:20,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:20,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:45:20,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:20,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:20,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:20,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:20,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:20,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279360140] [2020-10-27 01:45:20,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:20,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 01:45:20,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322273074] [2020-10-27 01:45:20,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 01:45:20,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:20,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 01:45:20,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 01:45:20,631 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 56 states. [2020-10-27 01:45:25,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:25,146 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-27 01:45:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 01:45:25,147 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 117 [2020-10-27 01:45:25,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:25,148 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:45:25,149 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:45:25,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-10-27 01:45:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:45:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-27 01:45:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:45:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2020-10-27 01:45:25,157 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2020-10-27 01:45:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:25,158 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2020-10-27 01:45:25,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 01:45:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2020-10-27 01:45:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 01:45:25,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:25,159 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:25,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:45:25,159 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:25,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:25,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2096862507, now seen corresponding path program 53 times [2020-10-27 01:45:25,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:25,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924500343] [2020-10-27 01:45:25,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:25,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:25,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:25,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 01:45:25,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:25,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-27 01:45:25,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:25,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 01:45:25,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:25,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 01:45:25,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:28,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:28,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:28,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:28,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:28,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:28,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:45:28,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:28,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:28,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:28,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:28,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:28,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924500343] [2020-10-27 01:45:28,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:28,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 01:45:28,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479141388] [2020-10-27 01:45:28,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 01:45:28,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:28,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 01:45:28,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:45:28,137 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 57 states. [2020-10-27 01:45:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:32,801 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-10-27 01:45:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 01:45:32,802 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 119 [2020-10-27 01:45:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:32,803 INFO L225 Difference]: With dead ends: 130 [2020-10-27 01:45:32,803 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 01:45:32,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-27 01:45:32,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 01:45:32,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-27 01:45:32,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 01:45:32,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-10-27 01:45:32,812 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2020-10-27 01:45:32,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:32,812 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-10-27 01:45:32,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 01:45:32,812 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-10-27 01:45:32,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 01:45:32,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:32,813 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:32,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:45:32,813 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:32,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:32,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1699243763, now seen corresponding path program 54 times [2020-10-27 01:45:32,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:32,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935473361] [2020-10-27 01:45:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:32,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:33,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:33,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 01:45:33,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:33,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-27 01:45:33,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 01:45:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:33,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 01:45:33,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:35,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:35,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:35,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:35,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:35,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:35,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:45:35,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:35,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:35,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:35,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:35,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:35,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935473361] [2020-10-27 01:45:35,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:35,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 01:45:35,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243385946] [2020-10-27 01:45:35,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 01:45:35,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:35,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 01:45:35,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 01:45:35,896 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 58 states. [2020-10-27 01:45:40,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:40,561 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-10-27 01:45:40,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 01:45:40,562 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 121 [2020-10-27 01:45:40,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:40,563 INFO L225 Difference]: With dead ends: 132 [2020-10-27 01:45:40,563 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 01:45:40,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2020-10-27 01:45:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 01:45:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-27 01:45:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-27 01:45:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2020-10-27 01:45:40,569 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2020-10-27 01:45:40,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:40,569 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2020-10-27 01:45:40,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 01:45:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2020-10-27 01:45:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 01:45:40,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:40,570 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:40,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:45:40,570 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:40,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:40,570 INFO L82 PathProgramCache]: Analyzing trace with hash -964832367, now seen corresponding path program 55 times [2020-10-27 01:45:40,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:40,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529776519] [2020-10-27 01:45:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:40,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:41,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:41,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 01:45:41,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:41,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-27 01:45:41,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:41,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 01:45:41,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:41,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 01:45:41,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:43,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:43,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:43,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:43,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:43,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:43,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:45:43,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:43,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:43,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:43,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:43,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:43,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529776519] [2020-10-27 01:45:43,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:43,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-27 01:45:43,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147905236] [2020-10-27 01:45:43,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-27 01:45:43,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:43,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-27 01:45:43,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:45:43,765 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 59 states. [2020-10-27 01:45:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:48,826 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-10-27 01:45:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 01:45:48,827 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 123 [2020-10-27 01:45:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:48,828 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:45:48,828 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 01:45:48,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2020-10-27 01:45:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 01:45:48,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-27 01:45:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-27 01:45:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2020-10-27 01:45:48,836 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2020-10-27 01:45:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:48,837 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2020-10-27 01:45:48,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-27 01:45:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2020-10-27 01:45:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 01:45:48,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:48,838 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:48,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:45:48,838 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:48,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:48,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1341484881, now seen corresponding path program 56 times [2020-10-27 01:45:48,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:48,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105628007] [2020-10-27 01:45:48,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:48,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:49,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:49,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 01:45:49,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:49,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 680 [2020-10-27 01:45:49,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:49,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-27 01:45:49,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:49,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 01:45:49,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:52,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:45:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:52,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:52,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:52,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:45:52,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:52,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:45:52,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:45:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:45:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:45:52,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:45:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:45:52,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105628007] [2020-10-27 01:45:52,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:45:52,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-27 01:45:52,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928994036] [2020-10-27 01:45:52,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-27 01:45:52,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:45:52,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-27 01:45:52,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 01:45:52,218 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 60 states. [2020-10-27 01:45:57,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:45:57,243 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-10-27 01:45:57,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-27 01:45:57,244 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 125 [2020-10-27 01:45:57,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:45:57,246 INFO L225 Difference]: With dead ends: 136 [2020-10-27 01:45:57,246 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 01:45:57,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2020-10-27 01:45:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 01:45:57,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-27 01:45:57,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 01:45:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2020-10-27 01:45:57,254 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2020-10-27 01:45:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:45:57,254 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2020-10-27 01:45:57,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-27 01:45:57,255 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2020-10-27 01:45:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 01:45:57,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:45:57,255 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:45:57,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:45:57,256 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:45:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:45:57,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1767669325, now seen corresponding path program 57 times [2020-10-27 01:45:57,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:45:57,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18665328] [2020-10-27 01:45:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:45:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:45:57,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:45:57,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:45:57,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 01:45:57,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:45:57,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 686 [2020-10-27 01:45:57,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:45:57,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-27 01:45:57,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:45:57,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 01:45:57,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:00,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:00,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:00,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:00,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:00,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:00,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:00,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:00,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:00,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:00,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:00,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:00,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18665328] [2020-10-27 01:46:00,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:00,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-27 01:46:00,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779927206] [2020-10-27 01:46:00,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-27 01:46:00,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:00,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-27 01:46:00,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:46:00,759 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 61 states. [2020-10-27 01:46:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:06,267 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-10-27 01:46:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-27 01:46:06,268 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 127 [2020-10-27 01:46:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:06,269 INFO L225 Difference]: With dead ends: 138 [2020-10-27 01:46:06,270 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 01:46:06,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2020-10-27 01:46:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 01:46:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-27 01:46:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 01:46:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2020-10-27 01:46:06,277 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2020-10-27 01:46:06,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:06,277 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2020-10-27 01:46:06,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-27 01:46:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2020-10-27 01:46:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 01:46:06,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:06,277 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:06,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:46:06,278 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:06,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:06,278 INFO L82 PathProgramCache]: Analyzing trace with hash 367623275, now seen corresponding path program 58 times [2020-10-27 01:46:06,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:06,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381603877] [2020-10-27 01:46:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:06,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:06,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:06,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 01:46:06,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:06,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-27 01:46:06,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-27 01:46:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:06,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-27 01:46:06,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:09,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:09,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:09,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:09,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:09,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:09,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:46:09,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:09,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:09,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:09,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:09,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:09,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381603877] [2020-10-27 01:46:09,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:09,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-27 01:46:09,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628547934] [2020-10-27 01:46:09,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-27 01:46:09,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:09,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-27 01:46:09,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 01:46:09,855 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 62 states. [2020-10-27 01:46:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:15,231 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-10-27 01:46:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 01:46:15,232 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 129 [2020-10-27 01:46:15,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:15,234 INFO L225 Difference]: With dead ends: 140 [2020-10-27 01:46:15,234 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 01:46:15,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2020-10-27 01:46:15,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 01:46:15,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-27 01:46:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 01:46:15,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-10-27 01:46:15,242 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2020-10-27 01:46:15,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:15,243 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-10-27 01:46:15,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-27 01:46:15,243 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-10-27 01:46:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 01:46:15,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:15,243 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:15,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:46:15,244 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:15,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:15,244 INFO L82 PathProgramCache]: Analyzing trace with hash -751867127, now seen corresponding path program 59 times [2020-10-27 01:46:15,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:15,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56939471] [2020-10-27 01:46:15,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:15,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:15,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:15,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 01:46:15,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:15,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-27 01:46:15,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:15,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-27 01:46:15,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:15,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-27 01:46:15,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:18,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:18,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:18,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:18,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:18,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:18,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:46:18,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:18,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:18,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:18,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:18,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56939471] [2020-10-27 01:46:18,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:18,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-27 01:46:18,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94615836] [2020-10-27 01:46:18,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-27 01:46:18,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:18,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-27 01:46:18,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:46:18,893 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 63 states. [2020-10-27 01:46:24,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:24,782 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-10-27 01:46:24,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-27 01:46:24,783 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 131 [2020-10-27 01:46:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:24,784 INFO L225 Difference]: With dead ends: 142 [2020-10-27 01:46:24,784 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 01:46:24,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2020-10-27 01:46:24,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 01:46:24,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-27 01:46:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-27 01:46:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2020-10-27 01:46:24,792 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2020-10-27 01:46:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:24,792 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2020-10-27 01:46:24,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-27 01:46:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2020-10-27 01:46:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 01:46:24,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:24,793 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:24,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:46:24,794 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1454647847, now seen corresponding path program 60 times [2020-10-27 01:46:24,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:24,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185701252] [2020-10-27 01:46:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:24,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:25,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:25,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 01:46:25,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:25,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-27 01:46:25,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:25,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-27 01:46:25,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:25,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-27 01:46:25,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:28,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:46:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:28,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:28,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:28,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:46:28,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:28,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:46:28,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:28,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:46:28,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:46:28,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:46:28,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:46:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:46:28,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185701252] [2020-10-27 01:46:28,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:46:28,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-27 01:46:28,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150104117] [2020-10-27 01:46:28,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-27 01:46:28,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:46:28,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-27 01:46:28,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 01:46:28,726 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 64 states. [2020-10-27 01:46:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:46:34,849 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2020-10-27 01:46:34,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-27 01:46:34,850 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 133 [2020-10-27 01:46:34,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:46:34,851 INFO L225 Difference]: With dead ends: 144 [2020-10-27 01:46:34,851 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:46:34,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2020-10-27 01:46:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:46:34,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-27 01:46:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 01:46:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2020-10-27 01:46:34,859 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2020-10-27 01:46:34,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:46:34,859 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2020-10-27 01:46:34,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-27 01:46:34,859 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2020-10-27 01:46:34,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 01:46:34,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:46:34,860 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:46:34,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:46:34,860 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:46:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:46:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash 201693637, now seen corresponding path program 61 times [2020-10-27 01:46:34,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:46:34,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765836233] [2020-10-27 01:46:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:46:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:46:34,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:46:35,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:46:35,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 01:46:35,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:46:35,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-10-27 01:46:35,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:46:35,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-27 01:46:35,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:46:35,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-27 01:46:35,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0