/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/bitvector-loops/overflow_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:00:08,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:00:08,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:00:08,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:00:08,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:00:08,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:00:08,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:00:08,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:00:08,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:00:08,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:00:08,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:00:08,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:00:08,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:00:08,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:00:08,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:00:08,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:00:08,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:00:08,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:00:08,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:00:08,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:00:08,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:00:08,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:00:08,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:00:08,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:00:08,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:00:08,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:00:08,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:00:08,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:00:08,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:00:08,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:00:08,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:00:08,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:00:08,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:00:08,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:00:08,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:00:08,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:00:08,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:00:08,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:00:08,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:00:08,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:00:08,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:00:08,366 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:00:08,418 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:00:08,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:00:08,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:00:08,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:00:08,424 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:00:08,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:00:08,424 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:00:08,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:00:08,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:00:08,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:00:08,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:00:08,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:00:08,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:00:08,426 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:00:08,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:00:08,429 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:00:08,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:00:08,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:00:08,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:00:08,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:00:08,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:00:08,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:00:08,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:00:08,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:00:08,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:00:08,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:00:08,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:00:08,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:00:08,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:00:08,433 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:00:08,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:00:08,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:00:08,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:00:08,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:00:08,869 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:00:08,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/overflow_1-2.c [2020-10-26 20:00:08,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/094179076/bd40cdeee6a6439c996c54e02b3909ca/FLAGc926b5d42 [2020-10-26 20:00:09,576 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:00:09,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/overflow_1-2.c [2020-10-26 20:00:09,584 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/094179076/bd40cdeee6a6439c996c54e02b3909ca/FLAGc926b5d42 [2020-10-26 20:00:09,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/094179076/bd40cdeee6a6439c996c54e02b3909ca [2020-10-26 20:00:09,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:00:09,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:00:09,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:00:09,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:00:09,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:00:09,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:00:09" (1/1) ... [2020-10-26 20:00:09,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3fd233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:09, skipping insertion in model container [2020-10-26 20:00:09,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:00:09" (1/1) ... [2020-10-26 20:00:09,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:00:09,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:00:10,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:00:10,151 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:00:10,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:00:10,188 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:00:10,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:10 WrapperNode [2020-10-26 20:00:10,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:00:10,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:00:10,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:00:10,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:00:10,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:10" (1/1) ... [2020-10-26 20:00:10,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:10" (1/1) ... [2020-10-26 20:00:10,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:10" (1/1) ... [2020-10-26 20:00:10,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:10" (1/1) ... [2020-10-26 20:00:10,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:10" (1/1) ... [2020-10-26 20:00:10,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:10" (1/1) ... [2020-10-26 20:00:10,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:10" (1/1) ... [2020-10-26 20:00:10,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:00:10,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:00:10,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:00:10,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:00:10,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:00:10,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:00:10,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:00:10,318 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:00:10,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 20:00:10,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:00:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:00:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:00:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:00:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:00:10,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 20:00:10,320 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:00:10,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:00:10,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:00:10,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:00:10,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:00:10,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:00:10,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:00:10,759 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:00:10,759 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:00:10,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:00:10 BoogieIcfgContainer [2020-10-26 20:00:10,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:00:10,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:00:10,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:00:10,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:00:10,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:00:09" (1/3) ... [2020-10-26 20:00:10,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f062d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:00:10, skipping insertion in model container [2020-10-26 20:00:10,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:00:10" (2/3) ... [2020-10-26 20:00:10,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f062d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:00:10, skipping insertion in model container [2020-10-26 20:00:10,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:00:10" (3/3) ... [2020-10-26 20:00:10,784 INFO L111 eAbstractionObserver]: Analyzing ICFG overflow_1-2.c [2020-10-26 20:00:10,799 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:00:10,809 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:00:10,823 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:00:10,867 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:00:10,867 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:00:10,868 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:00:10,868 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:00:10,868 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:00:10,868 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:00:10,868 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:00:10,868 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:00:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-26 20:00:10,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-26 20:00:10,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:10,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:10,905 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:10,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:10,946 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-26 20:00:10,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:10,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864472922] [2020-10-26 20:00:10,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:11,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:11,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:11,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:00:11,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:11,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 20:00:11,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:11,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:11,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:00:11,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:11,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:00:11,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:11,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:11,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:11,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:11,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:11,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:00:11,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:11,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:11,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:11,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:11,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:11,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864472922] [2020-10-26 20:00:11,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:00:11,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 20:00:11,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006177503] [2020-10-26 20:00:11,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 20:00:11,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:11,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 20:00:11,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 20:00:11,496 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-26 20:00:11,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:11,561 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-26 20:00:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 20:00:11,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-26 20:00:11,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:11,570 INFO L225 Difference]: With dead ends: 34 [2020-10-26 20:00:11,571 INFO L226 Difference]: Without dead ends: 13 [2020-10-26 20:00:11,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 20:00:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-26 20:00:11,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-26 20:00:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-26 20:00:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-26 20:00:11,616 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-26 20:00:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:11,617 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-26 20:00:11,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 20:00:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-26 20:00:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-26 20:00:11,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:11,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:11,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:00:11,618 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:11,619 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-26 20:00:11,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:11,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525829701] [2020-10-26 20:00:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:11,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:11,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:11,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:00:11,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:11,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-26 20:00:11,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:00:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:00:11,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:11,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:11,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:11,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:11,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:11,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:11,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:00:11,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:11,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:11,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:11,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:11,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525829701] [2020-10-26 20:00:11,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:00:11,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:00:11,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464527416] [2020-10-26 20:00:11,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:00:11,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:11,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:00:11,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:00:11,902 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-26 20:00:11,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:11,978 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-26 20:00:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 20:00:11,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-26 20:00:11,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:11,979 INFO L225 Difference]: With dead ends: 20 [2020-10-26 20:00:11,980 INFO L226 Difference]: Without dead ends: 14 [2020-10-26 20:00:11,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:00:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-26 20:00:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-26 20:00:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-26 20:00:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-26 20:00:11,989 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-26 20:00:11,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:11,989 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-26 20:00:11,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:00:11,989 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-26 20:00:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-26 20:00:11,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:11,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:11,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:00:11,991 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:11,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:11,992 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-26 20:00:11,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:11,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318321186] [2020-10-26 20:00:11,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:12,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:12,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:12,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-26 20:00:12,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:12,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-26 20:00:12,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:12,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 20:00:12,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:12,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 20:00:12,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:12,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:12,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:12,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:12,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:12,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:12,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:00:12,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:12,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:12,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:12,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:12,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:12,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318321186] [2020-10-26 20:00:12,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:12,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:00:12,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775429603] [2020-10-26 20:00:12,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:00:12,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:12,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:00:12,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:00:12,300 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-26 20:00:12,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:12,429 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-26 20:00:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:00:12,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-26 20:00:12,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:12,431 INFO L225 Difference]: With dead ends: 21 [2020-10-26 20:00:12,431 INFO L226 Difference]: Without dead ends: 15 [2020-10-26 20:00:12,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:00:12,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-26 20:00:12,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-26 20:00:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-26 20:00:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-26 20:00:12,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-26 20:00:12,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:12,440 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-26 20:00:12,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:00:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-26 20:00:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-26 20:00:12,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:12,441 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:12,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:00:12,442 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:12,442 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-26 20:00:12,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:12,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918816138] [2020-10-26 20:00:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:12,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:12,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:12,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:00:12,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:12,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-26 20:00:12,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:12,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:00:12,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:12,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 20:00:12,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:12,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:12,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:12,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:12,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:12,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:12,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:00:12,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:12,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:12,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:12,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:12,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:00:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:12,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918816138] [2020-10-26 20:00:12,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:12,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:00:12,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506742199] [2020-10-26 20:00:12,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:00:12,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:12,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:00:12,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:00:12,804 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-26 20:00:12,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:12,981 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-26 20:00:12,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:00:12,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-26 20:00:12,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:12,983 INFO L225 Difference]: With dead ends: 22 [2020-10-26 20:00:12,983 INFO L226 Difference]: Without dead ends: 16 [2020-10-26 20:00:12,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:00:12,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-26 20:00:12,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-26 20:00:12,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-26 20:00:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-26 20:00:12,991 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-26 20:00:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:12,991 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-26 20:00:12,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:00:12,991 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-26 20:00:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 20:00:12,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:12,992 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:12,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:00:12,993 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-26 20:00:12,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:12,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876334354] [2020-10-26 20:00:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:13,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:13,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:13,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 20:00:13,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:13,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 20:00:13,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:13,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:00:13,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:13,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 20:00:13,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:13,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:13,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:13,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:13,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:13,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:13,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:00:13,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:13,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:13,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:13,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:13,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:13,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876334354] [2020-10-26 20:00:13,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:13,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:00:13,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411579195] [2020-10-26 20:00:13,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:00:13,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:13,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:00:13,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:00:13,297 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-26 20:00:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:13,506 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-26 20:00:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:00:13,507 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-26 20:00:13,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:13,508 INFO L225 Difference]: With dead ends: 23 [2020-10-26 20:00:13,508 INFO L226 Difference]: Without dead ends: 17 [2020-10-26 20:00:13,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:00:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-26 20:00:13,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-26 20:00:13,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-26 20:00:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-26 20:00:13,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-26 20:00:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:13,520 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-26 20:00:13,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:00:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-26 20:00:13,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 20:00:13,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:13,522 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:13,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:00:13,523 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:13,523 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-26 20:00:13,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:13,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271501941] [2020-10-26 20:00:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:13,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:13,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:13,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 20:00:13,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:13,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-26 20:00:13,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:13,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:00:13,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:13,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 20:00:13,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:13,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:13,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:13,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:13,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:13,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:13,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:00:13,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:13,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:13,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:13,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:13,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:13,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271501941] [2020-10-26 20:00:13,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:13,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:00:13,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445497080] [2020-10-26 20:00:13,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:00:13,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:13,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:00:13,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:00:13,835 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-26 20:00:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:14,135 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-26 20:00:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:00:14,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-26 20:00:14,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:14,137 INFO L225 Difference]: With dead ends: 24 [2020-10-26 20:00:14,137 INFO L226 Difference]: Without dead ends: 18 [2020-10-26 20:00:14,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:00:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-26 20:00:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-26 20:00:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-26 20:00:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-26 20:00:14,143 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-26 20:00:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:14,144 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-26 20:00:14,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:00:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-26 20:00:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 20:00:14,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:14,145 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:14,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:00:14,145 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:14,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-26 20:00:14,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:14,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452628060] [2020-10-26 20:00:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:14,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:14,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:14,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 20:00:14,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:14,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-26 20:00:14,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:14,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 20:00:14,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:14,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 20:00:14,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:14,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:14,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:14,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:14,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:14,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:14,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:00:14,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:14,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:14,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:14,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:14,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:14,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452628060] [2020-10-26 20:00:14,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:14,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:00:14,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935217553] [2020-10-26 20:00:14,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:00:14,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:14,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:00:14,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:00:14,515 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-26 20:00:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:14,897 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-26 20:00:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:00:14,898 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-26 20:00:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:14,899 INFO L225 Difference]: With dead ends: 25 [2020-10-26 20:00:14,899 INFO L226 Difference]: Without dead ends: 19 [2020-10-26 20:00:14,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:00:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-26 20:00:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-26 20:00:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-26 20:00:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-26 20:00:14,906 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-26 20:00:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:14,906 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-26 20:00:14,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:00:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-26 20:00:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 20:00:14,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:14,907 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:14,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:00:14,908 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:14,908 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-26 20:00:14,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:14,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011495262] [2020-10-26 20:00:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:14,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:15,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:15,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 20:00:15,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:15,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-26 20:00:15,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:15,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:00:15,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:15,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 20:00:15,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:15,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:15,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:15,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:15,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:15,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:15,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:00:15,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:15,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:15,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011495262] [2020-10-26 20:00:15,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:15,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 20:00:15,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252447210] [2020-10-26 20:00:15,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:00:15,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:15,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:00:15,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:00:15,314 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-10-26 20:00:15,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:15,750 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-26 20:00:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:00:15,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-26 20:00:15,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:15,752 INFO L225 Difference]: With dead ends: 26 [2020-10-26 20:00:15,752 INFO L226 Difference]: Without dead ends: 20 [2020-10-26 20:00:15,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-26 20:00:15,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-26 20:00:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-26 20:00:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-26 20:00:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-26 20:00:15,764 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-26 20:00:15,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:15,769 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-26 20:00:15,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:00:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-26 20:00:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 20:00:15,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:15,770 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:15,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:00:15,770 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:15,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:15,774 INFO L82 PathProgramCache]: Analyzing trace with hash 611230302, now seen corresponding path program 7 times [2020-10-26 20:00:15,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:15,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573018403] [2020-10-26 20:00:15,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:15,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:15,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:15,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 20:00:15,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:15,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-26 20:00:15,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:15,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:00:15,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:15,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 20:00:15,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:16,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:16,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:16,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:16,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:16,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:16,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:00:16,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:16,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:16,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:16,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:16,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:16,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573018403] [2020-10-26 20:00:16,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:16,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 20:00:16,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967054456] [2020-10-26 20:00:16,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 20:00:16,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:16,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 20:00:16,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:00:16,196 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2020-10-26 20:00:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:16,695 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-26 20:00:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:00:16,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-26 20:00:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:16,697 INFO L225 Difference]: With dead ends: 27 [2020-10-26 20:00:16,697 INFO L226 Difference]: Without dead ends: 21 [2020-10-26 20:00:16,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-26 20:00:16,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-26 20:00:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-26 20:00:16,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-26 20:00:16,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-26 20:00:16,706 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-26 20:00:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:16,707 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-26 20:00:16,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 20:00:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-26 20:00:16,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 20:00:16,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:16,708 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:16,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:00:16,708 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:16,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1396409001, now seen corresponding path program 8 times [2020-10-26 20:00:16,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:16,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117423297] [2020-10-26 20:00:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:16,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:16,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:16,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 20:00:16,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:16,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-26 20:00:16,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:00:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:00:16,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:17,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:17,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:17,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:17,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:17,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:17,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:00:17,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:17,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:17,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:17,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:17,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:17,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117423297] [2020-10-26 20:00:17,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:17,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 20:00:17,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800112429] [2020-10-26 20:00:17,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:00:17,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:17,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:00:17,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:00:17,196 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-10-26 20:00:17,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:17,728 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-26 20:00:17,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:00:17,729 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-26 20:00:17,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:17,730 INFO L225 Difference]: With dead ends: 28 [2020-10-26 20:00:17,730 INFO L226 Difference]: Without dead ends: 22 [2020-10-26 20:00:17,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:00:17,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-26 20:00:17,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-26 20:00:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-26 20:00:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-26 20:00:17,740 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-26 20:00:17,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:17,742 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-26 20:00:17,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:00:17,742 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-26 20:00:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 20:00:17,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:17,747 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:17,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:00:17,747 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:17,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:17,748 INFO L82 PathProgramCache]: Analyzing trace with hash 791282046, now seen corresponding path program 9 times [2020-10-26 20:00:17,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:17,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062928680] [2020-10-26 20:00:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:17,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:18,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:18,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 20:00:18,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:18,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-26 20:00:18,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:00:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:18,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:00:18,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:18,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:18,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:18,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:18,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:18,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:18,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:00:18,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:18,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:18,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:18,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:18,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:18,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062928680] [2020-10-26 20:00:18,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:18,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 20:00:18,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552204456] [2020-10-26 20:00:18,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 20:00:18,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:18,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 20:00:18,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:00:18,362 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2020-10-26 20:00:18,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:18,975 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-26 20:00:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:00:18,976 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-26 20:00:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:18,977 INFO L225 Difference]: With dead ends: 29 [2020-10-26 20:00:18,977 INFO L226 Difference]: Without dead ends: 23 [2020-10-26 20:00:18,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-26 20:00:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-26 20:00:18,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-26 20:00:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-26 20:00:18,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-26 20:00:18,993 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-26 20:00:18,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:18,994 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-26 20:00:18,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 20:00:18,994 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-26 20:00:18,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 20:00:18,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:18,995 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:18,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:00:18,996 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:18,997 INFO L82 PathProgramCache]: Analyzing trace with hash -109772233, now seen corresponding path program 10 times [2020-10-26 20:00:18,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:18,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903837068] [2020-10-26 20:00:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:19,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:19,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:19,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 20:00:19,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:19,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-26 20:00:19,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 20:00:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:19,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:00:19,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:19,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:19,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:19,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:19,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:19,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:19,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:00:19,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:19,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:19,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:19,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903837068] [2020-10-26 20:00:19,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:19,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 20:00:19,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966138064] [2020-10-26 20:00:19,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 20:00:19,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:19,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 20:00:19,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:00:19,646 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-10-26 20:00:20,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:20,315 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-26 20:00:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:00:20,316 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-26 20:00:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:20,317 INFO L225 Difference]: With dead ends: 30 [2020-10-26 20:00:20,317 INFO L226 Difference]: Without dead ends: 24 [2020-10-26 20:00:20,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-26 20:00:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-26 20:00:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-26 20:00:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 20:00:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-26 20:00:20,330 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-26 20:00:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:20,331 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-26 20:00:20,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 20:00:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-26 20:00:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 20:00:20,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:20,333 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:20,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:00:20,333 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:20,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2022316190, now seen corresponding path program 11 times [2020-10-26 20:00:20,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:20,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757605985] [2020-10-26 20:00:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:20,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:20,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:20,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:00:20,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:20,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-26 20:00:20,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:20,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 20:00:20,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:20,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:00:20,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:21,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:21,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:21,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:21,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:21,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:21,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:00:21,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:21,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:21,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:21,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:21,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:00:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:21,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757605985] [2020-10-26 20:00:21,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:21,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 20:00:21,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634953868] [2020-10-26 20:00:21,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 20:00:21,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:21,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 20:00:21,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:00:21,219 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-10-26 20:00:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:21,934 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-26 20:00:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 20:00:21,935 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-26 20:00:21,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:21,936 INFO L225 Difference]: With dead ends: 31 [2020-10-26 20:00:21,936 INFO L226 Difference]: Without dead ends: 25 [2020-10-26 20:00:21,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-26 20:00:21,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-26 20:00:21,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-26 20:00:21,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 20:00:21,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-26 20:00:21,947 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-26 20:00:21,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:21,947 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-26 20:00:21,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 20:00:21,948 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-26 20:00:21,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 20:00:21,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:21,952 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:21,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:00:21,952 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:21,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:21,953 INFO L82 PathProgramCache]: Analyzing trace with hash -602419433, now seen corresponding path program 12 times [2020-10-26 20:00:21,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:21,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025580897] [2020-10-26 20:00:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:22,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:22,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:22,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 20:00:22,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:22,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-26 20:00:22,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:22,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:00:22,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:22,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 20:00:22,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:22,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:22,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:22,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:22,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:22,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:22,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:00:22,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:22,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:22,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025580897] [2020-10-26 20:00:22,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:22,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 20:00:22,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489151437] [2020-10-26 20:00:22,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 20:00:22,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:22,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 20:00:22,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:00:22,688 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 16 states. [2020-10-26 20:00:23,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:23,518 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-26 20:00:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 20:00:23,519 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-26 20:00:23,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:23,521 INFO L225 Difference]: With dead ends: 32 [2020-10-26 20:00:23,521 INFO L226 Difference]: Without dead ends: 26 [2020-10-26 20:00:23,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-26 20:00:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-26 20:00:23,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-26 20:00:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-26 20:00:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-26 20:00:23,537 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-26 20:00:23,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:23,538 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-26 20:00:23,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 20:00:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-26 20:00:23,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 20:00:23,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:23,538 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:23,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:00:23,539 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:23,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:23,540 INFO L82 PathProgramCache]: Analyzing trace with hash -364845122, now seen corresponding path program 13 times [2020-10-26 20:00:23,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:23,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620051373] [2020-10-26 20:00:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:23,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:24,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:24,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 20:00:24,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:24,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-26 20:00:24,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:24,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 20:00:24,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:24,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:00:24,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:24,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:24,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:24,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:24,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:24,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:24,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:00:24,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:24,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:24,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:24,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:24,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:24,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620051373] [2020-10-26 20:00:24,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:24,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 20:00:24,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091370750] [2020-10-26 20:00:24,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 20:00:24,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:24,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 20:00:24,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-26 20:00:24,417 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 17 states. [2020-10-26 20:00:25,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:25,324 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-26 20:00:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 20:00:25,325 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-26 20:00:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:25,326 INFO L225 Difference]: With dead ends: 33 [2020-10-26 20:00:25,326 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 20:00:25,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-26 20:00:25,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 20:00:25,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-26 20:00:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-26 20:00:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-26 20:00:25,337 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-26 20:00:25,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:25,338 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-26 20:00:25,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 20:00:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-26 20:00:25,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 20:00:25,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:25,339 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:25,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:00:25,340 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:25,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1589976073, now seen corresponding path program 14 times [2020-10-26 20:00:25,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:25,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148038063] [2020-10-26 20:00:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:25,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:25,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:25,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:00:25,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:25,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-26 20:00:25,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:25,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 20:00:25,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:25,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:00:25,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:26,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:26,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:26,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:26,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:26,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:26,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:00:26,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:26,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:26,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:26,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:26,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:26,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148038063] [2020-10-26 20:00:26,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:26,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 20:00:26,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449088414] [2020-10-26 20:00:26,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 20:00:26,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:26,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 20:00:26,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-26 20:00:26,229 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-10-26 20:00:27,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:27,275 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-26 20:00:27,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 20:00:27,276 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-26 20:00:27,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:27,277 INFO L225 Difference]: With dead ends: 34 [2020-10-26 20:00:27,277 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 20:00:27,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 20:00:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 20:00:27,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 20:00:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 20:00:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-26 20:00:27,285 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-26 20:00:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:27,285 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-26 20:00:27,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 20:00:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-26 20:00:27,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 20:00:27,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:27,286 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:27,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 20:00:27,287 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:27,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:27,287 INFO L82 PathProgramCache]: Analyzing trace with hash -914329890, now seen corresponding path program 15 times [2020-10-26 20:00:27,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:27,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864224497] [2020-10-26 20:00:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:27,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:27,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:27,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 20:00:27,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:27,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-10-26 20:00:27,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:27,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 20:00:27,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:27,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:00:27,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:28,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:28,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:28,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:28,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:28,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:28,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:00:28,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:28,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:28,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:28,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:28,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:28,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864224497] [2020-10-26 20:00:28,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:28,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 20:00:28,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832703042] [2020-10-26 20:00:28,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 20:00:28,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:28,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 20:00:28,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-26 20:00:28,294 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 19 states. [2020-10-26 20:00:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:29,437 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-26 20:00:29,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 20:00:29,437 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-26 20:00:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:29,438 INFO L225 Difference]: With dead ends: 35 [2020-10-26 20:00:29,439 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 20:00:29,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 20:00:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 20:00:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-26 20:00:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 20:00:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-26 20:00:29,447 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-26 20:00:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:29,447 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-26 20:00:29,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 20:00:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-26 20:00:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 20:00:29,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:29,448 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:29,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 20:00:29,448 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:29,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:29,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1444134697, now seen corresponding path program 16 times [2020-10-26 20:00:29,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:29,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493063096] [2020-10-26 20:00:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:29,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:30,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:30,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 20:00:30,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:30,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-26 20:00:30,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 20:00:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:30,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:00:30,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:30,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:30,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:30,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:30,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:30,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:30,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:00:30,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:30,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:30,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:30,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:30,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:30,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493063096] [2020-10-26 20:00:30,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:30,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 20:00:30,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135382991] [2020-10-26 20:00:30,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 20:00:30,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:30,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 20:00:30,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-26 20:00:30,579 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 20 states. [2020-10-26 20:00:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:31,796 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-26 20:00:31,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 20:00:31,796 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-26 20:00:31,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:31,797 INFO L225 Difference]: With dead ends: 36 [2020-10-26 20:00:31,797 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 20:00:31,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 20:00:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 20:00:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-26 20:00:31,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 20:00:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-26 20:00:31,806 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-26 20:00:31,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:31,806 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-26 20:00:31,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 20:00:31,807 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-26 20:00:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 20:00:31,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:31,807 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:31,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 20:00:31,808 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash -688214530, now seen corresponding path program 17 times [2020-10-26 20:00:31,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:31,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849199252] [2020-10-26 20:00:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:31,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:32,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:32,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:00:32,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:32,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-26 20:00:32,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:32,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 20:00:32,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:32,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 20:00:32,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:32,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:32,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:32,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:32,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:32,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:32,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:00:32,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:32,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:32,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:32,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:32,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:32,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849199252] [2020-10-26 20:00:32,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:32,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 20:00:32,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546071743] [2020-10-26 20:00:32,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 20:00:32,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:32,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 20:00:32,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:00:32,929 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 21 states. [2020-10-26 20:00:34,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:34,238 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-26 20:00:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 20:00:34,243 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-26 20:00:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:34,244 INFO L225 Difference]: With dead ends: 37 [2020-10-26 20:00:34,244 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 20:00:34,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 20:00:34,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 20:00:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-26 20:00:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 20:00:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-26 20:00:34,255 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-26 20:00:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:34,255 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-26 20:00:34,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 20:00:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-26 20:00:34,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 20:00:34,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:34,261 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:34,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 20:00:34,261 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:34,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1270474167, now seen corresponding path program 18 times [2020-10-26 20:00:34,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:34,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378867927] [2020-10-26 20:00:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:34,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:34,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:34,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 20:00:34,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:34,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-26 20:00:34,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:34,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 20:00:34,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:34,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:00:34,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:35,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:35,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:35,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:35,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:35,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:35,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:00:35,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:35,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:35,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:35,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:35,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:35,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378867927] [2020-10-26 20:00:35,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:35,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 20:00:35,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565131224] [2020-10-26 20:00:35,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 20:00:35,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:35,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 20:00:35,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-26 20:00:35,434 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 22 states. [2020-10-26 20:00:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:36,699 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-26 20:00:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 20:00:36,699 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-26 20:00:36,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:36,700 INFO L225 Difference]: With dead ends: 38 [2020-10-26 20:00:36,700 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 20:00:36,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 20:00:36,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 20:00:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-26 20:00:36,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 20:00:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-26 20:00:36,709 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-10-26 20:00:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:36,710 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-26 20:00:36,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 20:00:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-26 20:00:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 20:00:36,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:36,711 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:36,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 20:00:36,711 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:36,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:36,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1860281630, now seen corresponding path program 19 times [2020-10-26 20:00:36,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:36,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863826296] [2020-10-26 20:00:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:36,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:37,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:37,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 20:00:37,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:37,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 885 [2020-10-26 20:00:37,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:37,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 20:00:37,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:37,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 20:00:37,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:38,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:38,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:38,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:38,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:38,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:38,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:00:38,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:38,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:38,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:38,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:38,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:38,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863826296] [2020-10-26 20:00:38,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:38,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 20:00:38,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249127286] [2020-10-26 20:00:38,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 20:00:38,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:38,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 20:00:38,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-26 20:00:38,139 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 23 states. [2020-10-26 20:00:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:39,700 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-26 20:00:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 20:00:39,700 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-26 20:00:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:39,701 INFO L225 Difference]: With dead ends: 39 [2020-10-26 20:00:39,701 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 20:00:39,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 20:00:39,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 20:00:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-26 20:00:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 20:00:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-26 20:00:39,709 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-10-26 20:00:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:39,710 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-26 20:00:39,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 20:00:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-26 20:00:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 20:00:39,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:39,711 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:39,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 20:00:39,711 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:39,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:39,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1330523497, now seen corresponding path program 20 times [2020-10-26 20:00:39,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:39,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695005021] [2020-10-26 20:00:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:39,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:40,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:40,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 20:00:40,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:40,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 809 [2020-10-26 20:00:40,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 20:00:40,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:40,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:00:40,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:41,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:41,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:41,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:41,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:41,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:41,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:00:41,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:41,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:41,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:41,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:41,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:41,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695005021] [2020-10-26 20:00:41,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:41,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 20:00:41,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154175040] [2020-10-26 20:00:41,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 20:00:41,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:41,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 20:00:41,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-26 20:00:41,178 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 24 states. [2020-10-26 20:00:42,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:42,740 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-26 20:00:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 20:00:42,745 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-26 20:00:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:42,746 INFO L225 Difference]: With dead ends: 40 [2020-10-26 20:00:42,746 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 20:00:42,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 20:00:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 20:00:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-26 20:00:42,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 20:00:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-10-26 20:00:42,759 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-10-26 20:00:42,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:42,762 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-10-26 20:00:42,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 20:00:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-10-26 20:00:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 20:00:42,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:42,763 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:42,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 20:00:42,763 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:42,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1461234626, now seen corresponding path program 21 times [2020-10-26 20:00:42,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:42,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451599696] [2020-10-26 20:00:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:42,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:43,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:43,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 20:00:43,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:43,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-26 20:00:43,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:43,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 20:00:43,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:43,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 20:00:43,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:44,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:44,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:44,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:44,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:44,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:44,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:00:44,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:44,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:44,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:44,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:44,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:44,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451599696] [2020-10-26 20:00:44,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:44,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 20:00:44,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510706340] [2020-10-26 20:00:44,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 20:00:44,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:44,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 20:00:44,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-10-26 20:00:44,516 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 25 states. [2020-10-26 20:00:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:46,321 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-26 20:00:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 20:00:46,321 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-26 20:00:46,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:46,322 INFO L225 Difference]: With dead ends: 41 [2020-10-26 20:00:46,322 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 20:00:46,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=195, Invalid=1967, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 20:00:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 20:00:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-26 20:00:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 20:00:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-26 20:00:46,331 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-10-26 20:00:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:46,331 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-26 20:00:46,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 20:00:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-26 20:00:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 20:00:46,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:46,332 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:46,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 20:00:46,332 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:46,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:46,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1218312329, now seen corresponding path program 22 times [2020-10-26 20:00:46,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:46,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940324316] [2020-10-26 20:00:46,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:46,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:47,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:47,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 20:00:47,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:47,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 998 [2020-10-26 20:00:47,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:47,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 20:00:47,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:47,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 20:00:47,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:47,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:47,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:47,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:47,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:47,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:47,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:00:47,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:47,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:47,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:47,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:47,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:48,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940324316] [2020-10-26 20:00:48,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:48,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 20:00:48,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060455247] [2020-10-26 20:00:48,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 20:00:48,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 20:00:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-26 20:00:48,002 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 26 states. [2020-10-26 20:00:49,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:49,879 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-26 20:00:49,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 20:00:49,879 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-26 20:00:49,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:49,880 INFO L225 Difference]: With dead ends: 42 [2020-10-26 20:00:49,880 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 20:00:49,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 20:00:49,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 20:00:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-26 20:00:49,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 20:00:49,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-10-26 20:00:49,889 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-10-26 20:00:49,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:49,889 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-10-26 20:00:49,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 20:00:49,889 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-10-26 20:00:49,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 20:00:49,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:49,890 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:49,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 20:00:49,890 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:49,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:49,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2017311582, now seen corresponding path program 23 times [2020-10-26 20:00:49,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:49,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663117773] [2020-10-26 20:00:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:49,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:51,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:51,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 20:00:51,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:51,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1133 [2020-10-26 20:00:51,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:51,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 20:00:51,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:51,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 20:00:51,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:51,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:51,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:51,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:51,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:51,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:51,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:00:51,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:51,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:51,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:51,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:51,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:51,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663117773] [2020-10-26 20:00:51,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:51,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 20:00:51,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092114269] [2020-10-26 20:00:51,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 20:00:51,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 20:00:51,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-26 20:00:51,736 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 27 states. [2020-10-26 20:00:53,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:53,739 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-26 20:00:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 20:00:53,739 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-26 20:00:53,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:53,740 INFO L225 Difference]: With dead ends: 43 [2020-10-26 20:00:53,740 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 20:00:53,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 20:00:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 20:00:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-26 20:00:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 20:00:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-26 20:00:53,749 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-10-26 20:00:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:53,750 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-26 20:00:53,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 20:00:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-26 20:00:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 20:00:53,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:53,751 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:53,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 20:00:53,751 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:53,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:53,751 INFO L82 PathProgramCache]: Analyzing trace with hash -757562281, now seen corresponding path program 24 times [2020-10-26 20:00:53,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:53,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003460586] [2020-10-26 20:00:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:53,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:54,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:54,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:00:54,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:54,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1185 [2020-10-26 20:00:54,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:54,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 20:00:54,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:54,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 20:00:54,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:55,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:55,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:55,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:55,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:55,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:55,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:00:55,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:55,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:55,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:55,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:55,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:55,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003460586] [2020-10-26 20:00:55,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:55,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 20:00:55,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482755506] [2020-10-26 20:00:55,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 20:00:55,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:55,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 20:00:55,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-26 20:00:55,746 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 28 states. [2020-10-26 20:00:57,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:57,928 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-26 20:00:57,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 20:00:57,929 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-26 20:00:57,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:57,929 INFO L225 Difference]: With dead ends: 44 [2020-10-26 20:00:57,930 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 20:00:57,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 20:00:57,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 20:00:57,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-26 20:00:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 20:00:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-26 20:00:57,938 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-10-26 20:00:57,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:57,938 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-26 20:00:57,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 20:00:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-26 20:00:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 20:00:57,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:57,939 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:57,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 20:00:57,939 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:57,940 INFO L82 PathProgramCache]: Analyzing trace with hash -879306114, now seen corresponding path program 25 times [2020-10-26 20:00:57,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:57,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744907185] [2020-10-26 20:00:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:57,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:58,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:58,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 20:00:58,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:58,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 959 [2020-10-26 20:00:58,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:58,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 20:00:58,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:58,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 20:00:58,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:59,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:59,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:59,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:59,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:59,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:59,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:00:59,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:59,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:59,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744907185] [2020-10-26 20:00:59,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:59,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 20:00:59,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304291265] [2020-10-26 20:00:59,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 20:00:59,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:59,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 20:00:59,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-26 20:00:59,777 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 29 states. [2020-10-26 20:01:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:02,149 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-26 20:01:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 20:01:02,150 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-26 20:01:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:02,150 INFO L225 Difference]: With dead ends: 45 [2020-10-26 20:01:02,151 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 20:01:02,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 20:01:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 20:01:02,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-26 20:01:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 20:01:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-26 20:01:02,161 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-10-26 20:01:02,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:02,161 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-26 20:01:02,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 20:01:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-26 20:01:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 20:01:02,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:02,162 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:02,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 20:01:02,162 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:02,163 INFO L82 PathProgramCache]: Analyzing trace with hash -358397641, now seen corresponding path program 26 times [2020-10-26 20:01:02,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:02,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67234148] [2020-10-26 20:01:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:02,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:03,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:03,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 20:01:03,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:03,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1276 [2020-10-26 20:01:03,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:03,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 20:01:03,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:03,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 20:01:03,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:04,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:04,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:04,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:04,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:04,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:04,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:01:04,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:04,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:04,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:04,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:04,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:04,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67234148] [2020-10-26 20:01:04,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:04,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 20:01:04,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848290783] [2020-10-26 20:01:04,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 20:01:04,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:04,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 20:01:04,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-26 20:01:04,335 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 30 states. [2020-10-26 20:01:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:06,726 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-26 20:01:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 20:01:06,726 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-26 20:01:06,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:06,727 INFO L225 Difference]: With dead ends: 46 [2020-10-26 20:01:06,727 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 20:01:06,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 20:01:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 20:01:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-26 20:01:06,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 20:01:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-26 20:01:06,734 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-10-26 20:01:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:06,735 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-26 20:01:06,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 20:01:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-26 20:01:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 20:01:06,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:06,735 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:06,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 20:01:06,736 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1390104162, now seen corresponding path program 27 times [2020-10-26 20:01:06,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:06,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845849449] [2020-10-26 20:01:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:06,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:07,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:07,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 20:01:07,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:07,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-26 20:01:07,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:07,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 20:01:07,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:07,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 20:01:07,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:08,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:08,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:08,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:08,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:08,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:08,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:01:08,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:08,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:08,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:08,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:08,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:08,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845849449] [2020-10-26 20:01:08,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:08,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 20:01:08,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347298760] [2020-10-26 20:01:08,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 20:01:08,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:08,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 20:01:08,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-26 20:01:08,694 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 31 states. [2020-10-26 20:01:11,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:11,281 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-26 20:01:11,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 20:01:11,282 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-26 20:01:11,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:11,283 INFO L225 Difference]: With dead ends: 47 [2020-10-26 20:01:11,283 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 20:01:11,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 20:01:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 20:01:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-26 20:01:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 20:01:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-26 20:01:11,292 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-10-26 20:01:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:11,292 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-26 20:01:11,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 20:01:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-26 20:01:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 20:01:11,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:11,293 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:11,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 20:01:11,293 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:11,294 INFO L82 PathProgramCache]: Analyzing trace with hash 986732055, now seen corresponding path program 28 times [2020-10-26 20:01:11,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:11,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574940569] [2020-10-26 20:01:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:11,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:12,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:12,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 20:01:12,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:12,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1226 [2020-10-26 20:01:12,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:12,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 20:01:12,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:12,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:01:12,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:13,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:13,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:13,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:13,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:13,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:13,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:13,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:13,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:13,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:13,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:13,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:13,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574940569] [2020-10-26 20:01:13,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:13,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 20:01:13,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881396945] [2020-10-26 20:01:13,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 20:01:13,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:13,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 20:01:13,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-26 20:01:13,513 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 32 states. [2020-10-26 20:01:16,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:16,203 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-26 20:01:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 20:01:16,203 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-26 20:01:16,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:16,204 INFO L225 Difference]: With dead ends: 48 [2020-10-26 20:01:16,204 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 20:01:16,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 20:01:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 20:01:16,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-26 20:01:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 20:01:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-10-26 20:01:16,214 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-10-26 20:01:16,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:16,214 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-10-26 20:01:16,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 20:01:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-10-26 20:01:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 20:01:16,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:16,215 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:16,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 20:01:16,215 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:16,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:16,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1654210750, now seen corresponding path program 29 times [2020-10-26 20:01:16,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:16,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452483980] [2020-10-26 20:01:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:16,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:17,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:17,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 20:01:17,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:17,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1495 [2020-10-26 20:01:17,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:17,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 20:01:17,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:17,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 20:01:17,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:18,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:18,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:18,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:18,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:18,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:18,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:18,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:18,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:18,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:18,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:18,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:18,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452483980] [2020-10-26 20:01:18,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:18,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 20:01:18,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39049170] [2020-10-26 20:01:18,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 20:01:18,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:18,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 20:01:18,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 20:01:18,730 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 33 states. [2020-10-26 20:01:21,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:21,614 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-26 20:01:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 20:01:21,616 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-26 20:01:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:21,617 INFO L225 Difference]: With dead ends: 49 [2020-10-26 20:01:21,617 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 20:01:21,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 20:01:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 20:01:21,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-26 20:01:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 20:01:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-26 20:01:21,624 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-10-26 20:01:21,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:21,625 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-26 20:01:21,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 20:01:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-26 20:01:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 20:01:21,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:21,625 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:21,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 20:01:21,625 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:21,626 INFO L82 PathProgramCache]: Analyzing trace with hash 871213815, now seen corresponding path program 30 times [2020-10-26 20:01:21,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:21,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74666801] [2020-10-26 20:01:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:21,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:23,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:23,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 20:01:23,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:23,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1416 [2020-10-26 20:01:23,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:23,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 20:01:23,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:23,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 20:01:23,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:24,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:24,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:24,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:24,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:24,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:24,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:01:24,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:24,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:24,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:24,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:24,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:24,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74666801] [2020-10-26 20:01:24,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:24,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 20:01:24,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128565472] [2020-10-26 20:01:24,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 20:01:24,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:24,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 20:01:24,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 20:01:24,182 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 34 states. [2020-10-26 20:01:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:27,235 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-26 20:01:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 20:01:27,237 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-26 20:01:27,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:27,238 INFO L225 Difference]: With dead ends: 50 [2020-10-26 20:01:27,238 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 20:01:27,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-10-26 20:01:27,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 20:01:27,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-26 20:01:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 20:01:27,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-26 20:01:27,246 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-10-26 20:01:27,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:27,247 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-26 20:01:27,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 20:01:27,247 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-26 20:01:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 20:01:27,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:27,247 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:27,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 20:01:27,248 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:27,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:27,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1926854690, now seen corresponding path program 31 times [2020-10-26 20:01:27,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:27,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93106872] [2020-10-26 20:01:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:27,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:28,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:28,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 20:01:28,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:28,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1532 [2020-10-26 20:01:28,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:28,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 20:01:28,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:28,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:01:28,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:29,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:29,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:29,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:29,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:29,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:29,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:29,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:29,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:29,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:29,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:29,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:30,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93106872] [2020-10-26 20:01:30,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:30,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 20:01:30,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077342666] [2020-10-26 20:01:30,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 20:01:30,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:30,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 20:01:30,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 20:01:30,007 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 35 states. [2020-10-26 20:01:33,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:33,193 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-26 20:01:33,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 20:01:33,194 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-26 20:01:33,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:33,194 INFO L225 Difference]: With dead ends: 51 [2020-10-26 20:01:33,195 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 20:01:33,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=373, Invalid=4049, Unknown=0, NotChecked=0, Total=4422 [2020-10-26 20:01:33,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 20:01:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-26 20:01:33,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 20:01:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-26 20:01:33,205 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-10-26 20:01:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:33,205 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-26 20:01:33,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 20:01:33,205 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-26 20:01:33,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 20:01:33,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:33,206 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:33,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 20:01:33,206 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:33,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:33,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1527334871, now seen corresponding path program 32 times [2020-10-26 20:01:33,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:33,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789603068] [2020-10-26 20:01:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:33,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:35,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:35,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 20:01:35,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:35,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1905 [2020-10-26 20:01:35,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 20:01:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 20:01:35,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:36,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:36,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:36,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:36,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:36,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:36,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:01:36,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:36,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:36,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:36,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:36,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:36,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789603068] [2020-10-26 20:01:36,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:36,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 20:01:36,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045996482] [2020-10-26 20:01:36,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 20:01:36,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 20:01:36,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 20:01:36,378 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 36 states. [2020-10-26 20:01:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:39,774 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-26 20:01:39,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 20:01:39,775 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-26 20:01:39,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:39,776 INFO L225 Difference]: With dead ends: 52 [2020-10-26 20:01:39,777 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 20:01:39,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2020-10-26 20:01:39,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 20:01:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-26 20:01:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 20:01:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-10-26 20:01:39,785 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-10-26 20:01:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:39,786 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-10-26 20:01:39,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 20:01:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-10-26 20:01:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 20:01:39,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:39,787 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:39,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 20:01:39,787 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1233028862, now seen corresponding path program 33 times [2020-10-26 20:01:39,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:39,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096126793] [2020-10-26 20:01:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:39,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:41,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:41,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 20:01:41,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:41,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1860 [2020-10-26 20:01:41,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:41,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 20:01:41,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:41,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 20:01:41,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:42,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:42,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:42,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:42,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:42,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:42,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:01:42,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:42,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:42,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096126793] [2020-10-26 20:01:42,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:42,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 20:01:42,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692606181] [2020-10-26 20:01:42,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 20:01:42,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:42,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 20:01:42,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 20:01:42,975 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 37 states. [2020-10-26 20:01:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:46,500 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-26 20:01:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 20:01:46,501 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-26 20:01:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:46,502 INFO L225 Difference]: With dead ends: 53 [2020-10-26 20:01:46,502 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 20:01:46,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2020-10-26 20:01:46,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 20:01:46,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-26 20:01:46,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 20:01:46,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-26 20:01:46,512 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-10-26 20:01:46,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:46,512 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-26 20:01:46,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 20:01:46,512 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-26 20:01:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 20:01:46,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:46,513 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:46,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 20:01:46,513 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:46,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:46,514 INFO L82 PathProgramCache]: Analyzing trace with hash 699477175, now seen corresponding path program 34 times [2020-10-26 20:01:46,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:46,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743708855] [2020-10-26 20:01:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:46,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:48,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:48,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 20:01:48,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:48,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1711 [2020-10-26 20:01:48,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:48,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 20:01:48,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:48,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:01:48,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:49,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:49,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:49,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:49,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:49,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:49,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:01:49,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:49,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:49,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743708855] [2020-10-26 20:01:49,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:49,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 20:01:49,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868670237] [2020-10-26 20:01:49,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 20:01:49,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:49,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 20:01:49,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 20:01:49,554 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 38 states. [2020-10-26 20:01:53,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:01:53,231 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-26 20:01:53,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 20:01:53,232 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-26 20:01:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:01:53,233 INFO L225 Difference]: With dead ends: 54 [2020-10-26 20:01:53,233 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 20:01:53,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2020-10-26 20:01:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 20:01:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-26 20:01:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 20:01:53,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-10-26 20:01:53,241 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-10-26 20:01:53,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:01:53,241 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-10-26 20:01:53,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 20:01:53,241 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-10-26 20:01:53,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 20:01:53,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:01:53,242 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:01:53,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 20:01:53,242 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:01:53,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:01:53,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1339244062, now seen corresponding path program 35 times [2020-10-26 20:01:53,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:01:53,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923301250] [2020-10-26 20:01:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:01:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:53,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:55,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:55,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 20:01:55,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:55,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2058 [2020-10-26 20:01:55,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:55,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 20:01:55,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:01:55,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 20:01:55,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:56,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:01:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:01:56,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:01:56,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:01:56,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:01:56,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:01:56,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:01:56,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:01:56,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:01:56,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:01:56,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:01:56,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:01:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:01:56,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923301250] [2020-10-26 20:01:56,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:01:56,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 20:01:56,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116497029] [2020-10-26 20:01:56,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 20:01:56,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:01:56,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 20:01:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 20:01:56,732 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 39 states. [2020-10-26 20:02:00,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:00,632 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-26 20:02:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 20:02:00,633 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-26 20:02:00,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:00,633 INFO L225 Difference]: With dead ends: 55 [2020-10-26 20:02:00,634 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 20:02:00,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2020-10-26 20:02:00,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 20:02:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-26 20:02:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 20:02:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-26 20:02:00,642 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-10-26 20:02:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:00,642 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-26 20:02:00,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 20:02:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-26 20:02:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 20:02:00,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:00,643 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:00,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 20:02:00,644 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:00,644 INFO L82 PathProgramCache]: Analyzing trace with hash -302818921, now seen corresponding path program 36 times [2020-10-26 20:02:00,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:00,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753402423] [2020-10-26 20:02:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:00,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:03,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:03,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 20:02:03,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:03,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2559 [2020-10-26 20:02:03,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:03,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 20:02:03,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:02:03,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:02:03,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:04,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:04,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:04,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:04,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:04,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:04,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:02:04,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:04,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:02:04,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753402423] [2020-10-26 20:02:04,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:04,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 20:02:04,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209611246] [2020-10-26 20:02:04,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 20:02:04,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:04,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 20:02:04,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 20:02:04,740 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 40 states. [2020-10-26 20:02:08,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:08,816 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-26 20:02:08,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 20:02:08,817 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-26 20:02:08,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:08,818 INFO L225 Difference]: With dead ends: 56 [2020-10-26 20:02:08,818 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 20:02:08,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=225, Invalid=5627, Unknown=0, NotChecked=0, Total=5852 [2020-10-26 20:02:08,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 20:02:08,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-26 20:02:08,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 20:02:08,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-26 20:02:08,831 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-10-26 20:02:08,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:08,831 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-26 20:02:08,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 20:02:08,831 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-26 20:02:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 20:02:08,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:08,832 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:08,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 20:02:08,832 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:08,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:08,832 INFO L82 PathProgramCache]: Analyzing trace with hash 332836158, now seen corresponding path program 37 times [2020-10-26 20:02:08,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:08,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342050477] [2020-10-26 20:02:08,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:08,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:11,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:11,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:02:11,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:11,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2275 [2020-10-26 20:02:11,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:11,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 20:02:11,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:02:11,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:02:11,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:12,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:12,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:12,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:12,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:12,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:12,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:02:12,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:12,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:12,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:12,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:12,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:02:12,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342050477] [2020-10-26 20:02:12,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:12,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 20:02:12,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967212532] [2020-10-26 20:02:12,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 20:02:12,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:12,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 20:02:12,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 20:02:12,739 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 41 states. [2020-10-26 20:02:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:16,937 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-26 20:02:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 20:02:16,938 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-26 20:02:16,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:16,939 INFO L225 Difference]: With dead ends: 57 [2020-10-26 20:02:16,939 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 20:02:16,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2020-10-26 20:02:16,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 20:02:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-26 20:02:16,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 20:02:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-26 20:02:16,949 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-10-26 20:02:16,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:16,949 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-26 20:02:16,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 20:02:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-26 20:02:16,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 20:02:16,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:16,950 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:16,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 20:02:16,951 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:16,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1436692873, now seen corresponding path program 38 times [2020-10-26 20:02:16,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:16,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292837799] [2020-10-26 20:02:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:16,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:19,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:19,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 20:02:19,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:19,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2670 [2020-10-26 20:02:19,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:19,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 20:02:19,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:02:19,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 20:02:19,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:21,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:21,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:21,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:21,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:21,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:21,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:02:21,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:21,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:21,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:21,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:21,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:02:21,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292837799] [2020-10-26 20:02:21,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:21,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 20:02:21,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945551195] [2020-10-26 20:02:21,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 20:02:21,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:21,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 20:02:21,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 20:02:21,280 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 42 states. [2020-10-26 20:02:25,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:25,683 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-26 20:02:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 20:02:25,684 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-26 20:02:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:25,686 INFO L225 Difference]: With dead ends: 58 [2020-10-26 20:02:25,686 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 20:02:25,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2020-10-26 20:02:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 20:02:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-26 20:02:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 20:02:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-10-26 20:02:25,694 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-10-26 20:02:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:25,694 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-10-26 20:02:25,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 20:02:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-10-26 20:02:25,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 20:02:25,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:25,695 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:25,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 20:02:25,695 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:25,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:25,695 INFO L82 PathProgramCache]: Analyzing trace with hash -457517986, now seen corresponding path program 39 times [2020-10-26 20:02:25,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:25,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425968636] [2020-10-26 20:02:25,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:25,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:28,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:28,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 20:02:28,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:28,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2288 [2020-10-26 20:02:28,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:28,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 20:02:28,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:02:28,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 20:02:28,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:29,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:29,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:29,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:29,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:29,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:29,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:02:29,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:29,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:29,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:29,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:29,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:02:29,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425968636] [2020-10-26 20:02:29,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:29,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 20:02:29,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98318049] [2020-10-26 20:02:29,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 20:02:29,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:29,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 20:02:29,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 20:02:29,705 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 43 states. [2020-10-26 20:02:34,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:34,372 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-26 20:02:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 20:02:34,373 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-26 20:02:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:34,374 INFO L225 Difference]: With dead ends: 59 [2020-10-26 20:02:34,374 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 20:02:34,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2020-10-26 20:02:34,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 20:02:34,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-26 20:02:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 20:02:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-26 20:02:34,383 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-10-26 20:02:34,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:34,383 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-26 20:02:34,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 20:02:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-26 20:02:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 20:02:34,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:34,384 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:34,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 20:02:34,384 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:34,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:34,385 INFO L82 PathProgramCache]: Analyzing trace with hash -167867561, now seen corresponding path program 40 times [2020-10-26 20:02:34,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:34,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10440725] [2020-10-26 20:02:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:34,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:37,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:37,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 20:02:37,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:37,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3207 [2020-10-26 20:02:37,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:37,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 20:02:37,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:02:37,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 20:02:37,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:39,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:39,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:39,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:39,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:39,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:39,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:02:39,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:39,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:39,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:39,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:39,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:02:39,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10440725] [2020-10-26 20:02:39,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:39,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 20:02:39,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505071093] [2020-10-26 20:02:39,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 20:02:39,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:39,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 20:02:39,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 20:02:39,395 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 44 states. [2020-10-26 20:02:44,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:44,287 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-26 20:02:44,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 20:02:44,288 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-26 20:02:44,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:44,288 INFO L225 Difference]: With dead ends: 60 [2020-10-26 20:02:44,288 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 20:02:44,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=249, Invalid=6891, Unknown=0, NotChecked=0, Total=7140 [2020-10-26 20:02:44,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 20:02:44,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-26 20:02:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 20:02:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-10-26 20:02:44,296 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-10-26 20:02:44,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:44,296 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-10-26 20:02:44,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 20:02:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-10-26 20:02:44,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 20:02:44,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:44,297 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:44,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 20:02:44,297 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:44,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:44,298 INFO L82 PathProgramCache]: Analyzing trace with hash 221361022, now seen corresponding path program 41 times [2020-10-26 20:02:44,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:44,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416481970] [2020-10-26 20:02:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:44,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:47,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:47,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 20:02:47,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:47,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3316 [2020-10-26 20:02:47,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 20:02:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:02:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 20:02:47,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:49,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:49,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:49,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:49,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:49,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:49,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:02:49,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:49,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:49,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:49,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:49,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:02:49,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416481970] [2020-10-26 20:02:49,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:49,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 20:02:49,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335928362] [2020-10-26 20:02:49,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 20:02:49,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:49,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 20:02:49,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 20:02:49,478 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 45 states. [2020-10-26 20:02:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:02:54,462 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-26 20:02:54,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 20:02:54,463 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-26 20:02:54,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:02:54,464 INFO L225 Difference]: With dead ends: 61 [2020-10-26 20:02:54,464 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 20:02:54,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=493, Invalid=6989, Unknown=0, NotChecked=0, Total=7482 [2020-10-26 20:02:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 20:02:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-26 20:02:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 20:02:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-26 20:02:54,473 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-10-26 20:02:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:02:54,474 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-26 20:02:54,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 20:02:54,474 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-26 20:02:54,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 20:02:54,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:02:54,475 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:02:54,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 20:02:54,475 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:02:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:02:54,475 INFO L82 PathProgramCache]: Analyzing trace with hash -597454793, now seen corresponding path program 42 times [2020-10-26 20:02:54,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:02:54,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556808097] [2020-10-26 20:02:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:02:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:54,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:58,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:58,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 20:02:58,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:58,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3499 [2020-10-26 20:02:58,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:58,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 20:02:58,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:02:58,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 20:02:58,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:59,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:02:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:02:59,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:02:59,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:02:59,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:02:59,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:02:59,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:02:59,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:02:59,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:02:59,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:02:59,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:02:59,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:02:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:02:59,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556808097] [2020-10-26 20:02:59,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:02:59,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 20:02:59,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400427348] [2020-10-26 20:02:59,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 20:02:59,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:02:59,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 20:02:59,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 20:02:59,987 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 46 states. [2020-10-26 20:03:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:05,223 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-26 20:03:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 20:03:05,223 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-26 20:03:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:05,224 INFO L225 Difference]: With dead ends: 62 [2020-10-26 20:03:05,225 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 20:03:05,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2020-10-26 20:03:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 20:03:05,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-26 20:03:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 20:03:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-10-26 20:03:05,232 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-10-26 20:03:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:05,232 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-10-26 20:03:05,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 20:03:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-10-26 20:03:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 20:03:05,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:03:05,233 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:03:05,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 20:03:05,233 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:03:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:03:05,234 INFO L82 PathProgramCache]: Analyzing trace with hash -210941282, now seen corresponding path program 43 times [2020-10-26 20:03:05,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:03:05,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792110258] [2020-10-26 20:03:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:03:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:05,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:08,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:08,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 20:03:08,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:08,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3243 [2020-10-26 20:03:08,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:08,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 20:03:08,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:03:08,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 20:03:08,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:10,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:03:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:10,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:10,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:10,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:03:10,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:10,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:03:10,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:03:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:03:10,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:03:10,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:03:10,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792110258] [2020-10-26 20:03:10,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:03:10,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 20:03:10,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452138770] [2020-10-26 20:03:10,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 20:03:10,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:03:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 20:03:10,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 20:03:10,575 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 47 states. [2020-10-26 20:03:16,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:16,179 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-26 20:03:16,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 20:03:16,181 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-26 20:03:16,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:16,182 INFO L225 Difference]: With dead ends: 63 [2020-10-26 20:03:16,182 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 20:03:16,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=267, Invalid=7923, Unknown=0, NotChecked=0, Total=8190 [2020-10-26 20:03:16,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 20:03:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-26 20:03:16,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 20:03:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-26 20:03:16,188 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-10-26 20:03:16,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:16,189 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-26 20:03:16,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 20:03:16,189 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-26 20:03:16,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 20:03:16,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:03:16,189 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:03:16,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 20:03:16,189 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:03:16,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:03:16,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1113924329, now seen corresponding path program 44 times [2020-10-26 20:03:16,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:03:16,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654343573] [2020-10-26 20:03:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:03:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:16,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:19,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:19,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 20:03:19,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:19,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3705 [2020-10-26 20:03:19,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:19,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-26 20:03:19,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:03:19,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:03:19,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:22,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:03:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:22,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:22,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:22,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:03:22,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:22,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:03:22,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:03:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:03:22,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:03:22,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:03:22,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654343573] [2020-10-26 20:03:22,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:03:22,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-26 20:03:22,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897159124] [2020-10-26 20:03:22,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-26 20:03:22,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:03:22,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-26 20:03:22,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 20:03:22,086 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 48 states. [2020-10-26 20:03:27,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:27,884 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-26 20:03:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-26 20:03:27,885 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-26 20:03:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:27,886 INFO L225 Difference]: With dead ends: 64 [2020-10-26 20:03:27,886 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 20:03:27,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=273, Invalid=8283, Unknown=0, NotChecked=0, Total=8556 [2020-10-26 20:03:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 20:03:27,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-26 20:03:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 20:03:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-26 20:03:27,895 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-10-26 20:03:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:27,896 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-26 20:03:27,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-26 20:03:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-26 20:03:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 20:03:27,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:03:27,897 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:03:27,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 20:03:27,897 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:03:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:03:27,897 INFO L82 PathProgramCache]: Analyzing trace with hash 958372286, now seen corresponding path program 45 times [2020-10-26 20:03:27,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:03:27,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350757592] [2020-10-26 20:03:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:03:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:27,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:32,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:32,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 20:03:32,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:32,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4389 [2020-10-26 20:03:32,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-26 20:03:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:03:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 20:03:32,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:34,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:03:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:34,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:34,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:34,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:03:34,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:34,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:03:34,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:03:34,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:03:34,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:03:34,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:03:34,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350757592] [2020-10-26 20:03:34,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:03:34,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 20:03:34,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264915307] [2020-10-26 20:03:34,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 20:03:34,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:03:34,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 20:03:34,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 20:03:34,567 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 49 states. [2020-10-26 20:03:40,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:40,680 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-26 20:03:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 20:03:40,681 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-26 20:03:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:40,682 INFO L225 Difference]: With dead ends: 65 [2020-10-26 20:03:40,682 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 20:03:40,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=279, Invalid=8651, Unknown=0, NotChecked=0, Total=8930 [2020-10-26 20:03:40,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 20:03:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-26 20:03:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 20:03:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-26 20:03:40,691 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-10-26 20:03:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:40,691 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-26 20:03:40,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 20:03:40,691 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-26 20:03:40,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 20:03:40,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:03:40,692 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:03:40,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 20:03:40,692 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:03:40,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:03:40,693 INFO L82 PathProgramCache]: Analyzing trace with hash 775057911, now seen corresponding path program 46 times [2020-10-26 20:03:40,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:03:40,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010490484] [2020-10-26 20:03:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:03:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:40,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:45,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:45,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 20:03:45,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:45,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4590 [2020-10-26 20:03:45,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:45,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-26 20:03:45,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:03:45,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 20:03:45,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:47,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:03:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:47,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:47,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:47,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:03:47,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:47,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 20:03:47,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:47,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:03:47,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:03:47,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:03:47,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:03:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:03:47,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010490484] [2020-10-26 20:03:47,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:03:47,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-26 20:03:47,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476886874] [2020-10-26 20:03:47,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-26 20:03:47,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:03:47,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-26 20:03:47,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 20:03:47,638 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 50 states. [2020-10-26 20:03:53,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:03:53,981 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-26 20:03:53,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 20:03:53,982 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-26 20:03:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:03:53,983 INFO L225 Difference]: With dead ends: 66 [2020-10-26 20:03:53,984 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 20:03:53,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=285, Invalid=9027, Unknown=0, NotChecked=0, Total=9312 [2020-10-26 20:03:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 20:03:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-26 20:03:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 20:03:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-10-26 20:03:53,993 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-10-26 20:03:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:03:53,995 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-10-26 20:03:53,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-26 20:03:53,995 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-10-26 20:03:53,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 20:03:53,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:03:53,996 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:03:53,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 20:03:53,996 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:03:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:03:53,997 INFO L82 PathProgramCache]: Analyzing trace with hash -612720418, now seen corresponding path program 47 times [2020-10-26 20:03:53,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:03:53,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018112658] [2020-10-26 20:03:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:03:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:03:54,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:03:58,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:03:58,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 20:03:58,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:03:58,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4640 [2020-10-26 20:03:58,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:03:58,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-26 20:03:58,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:03:58,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 20:03:58,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0