/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/eca-rers2012/Problem03_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:44:49,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:44:50,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:44:50,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:44:50,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:44:50,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:44:50,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:44:50,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:44:50,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:44:50,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:44:50,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:44:50,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:44:50,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:44:50,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:44:50,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:44:50,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:44:50,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:44:50,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:44:50,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:44:50,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:44:50,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:44:50,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:44:50,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:44:50,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:44:50,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:44:50,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:44:50,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:44:50,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:44:50,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:44:50,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:44:50,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:44:50,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:44:50,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:44:50,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:44:50,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:44:50,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:44:50,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:44:50,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:44:50,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:44:50,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:44:50,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:44:50,128 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 20:44:50,157 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:44:50,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:44:50,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:44:50,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:44:50,159 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:44:50,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:44:50,159 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:44:50,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:44:50,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:44:50,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:44:50,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:44:50,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:44:50,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:44:50,161 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:44:50,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:44:50,161 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:44:50,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:44:50,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:44:50,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:44:50,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:44:50,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:44:50,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:44:50,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:44:50,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:44:50,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:44:50,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:44:50,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:44:50,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:44:50,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:44:50,164 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:44:50,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:44:50,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:44:50,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:44:50,595 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:44:50,596 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:44:50,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label20.c [2020-10-26 20:44:50,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82ea0c1bd/aa7cd68e0a204a81b93fbbcc39766edb/FLAG652b72439 [2020-10-26 20:44:51,643 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:44:51,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label20.c [2020-10-26 20:44:51,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82ea0c1bd/aa7cd68e0a204a81b93fbbcc39766edb/FLAG652b72439 [2020-10-26 20:44:51,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82ea0c1bd/aa7cd68e0a204a81b93fbbcc39766edb [2020-10-26 20:44:51,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:44:51,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:44:51,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:44:51,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:44:51,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:44:51,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:44:51" (1/1) ... [2020-10-26 20:44:51,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6165b11f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:51, skipping insertion in model container [2020-10-26 20:44:51,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:44:51" (1/1) ... [2020-10-26 20:44:51,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:44:51,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:44:52,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:44:52,588 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:44:52,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:44:52,943 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:44:52,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:52 WrapperNode [2020-10-26 20:44:52,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:44:52,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:44:52,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:44:52,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:44:52,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:52" (1/1) ... [2020-10-26 20:44:52,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:52" (1/1) ... [2020-10-26 20:44:53,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:52" (1/1) ... [2020-10-26 20:44:53,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:52" (1/1) ... [2020-10-26 20:44:53,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:52" (1/1) ... [2020-10-26 20:44:53,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:52" (1/1) ... [2020-10-26 20:44:53,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:52" (1/1) ... [2020-10-26 20:44:53,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:44:53,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:44:53,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:44:53,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:44:53,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:52" (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 20:44:53,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:44:53,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:44:53,255 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:44:53,256 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:44:53,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:44:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:44:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:44:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:44:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:44:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:44:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:44:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:44:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:44:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:44:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:44:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:44:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:44:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:44:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:44:55,371 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:44:55,371 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:44:55,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:44:55 BoogieIcfgContainer [2020-10-26 20:44:55,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:44:55,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:44:55,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:44:55,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:44:55,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:44:51" (1/3) ... [2020-10-26 20:44:55,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5528a03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:44:55, skipping insertion in model container [2020-10-26 20:44:55,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:52" (2/3) ... [2020-10-26 20:44:55,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5528a03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:44:55, skipping insertion in model container [2020-10-26 20:44:55,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:44:55" (3/3) ... [2020-10-26 20:44:55,383 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label20.c [2020-10-26 20:44:55,396 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:44:55,402 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:44:55,416 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:44:55,448 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:44:55,448 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:44:55,448 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:44:55,449 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:44:55,449 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:44:55,449 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:44:55,449 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:44:55,449 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:44:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:44:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 20:44:55,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:55,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:55,497 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:55,504 INFO L82 PathProgramCache]: Analyzing trace with hash -703080968, now seen corresponding path program 1 times [2020-10-26 20:44:55,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:55,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087820485] [2020-10-26 20:44:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:56,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:57,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:00,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:00,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-26 20:45:00,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:00,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4190 [2020-10-26 20:45:00,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:00,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:45:00,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:00,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:45:00,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:45:01,505 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2020-10-26 20:45:01,744 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2020-10-26 20:45:02,029 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-10-26 20:45:02,252 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-10-26 20:45:02,523 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2020-10-26 20:45:02,743 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-26 20:45:02,912 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-26 20:45:03,060 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-10-26 20:45:03,347 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:03,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:03,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:03,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:03,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:03,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:03,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 20:45:03,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:03,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:03,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:03,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:03,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:04,330 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 20:45:04,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087820485] [2020-10-26 20:45:04,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:45:04,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:45:04,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970146274] [2020-10-26 20:45:04,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:45:04,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:04,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:45:04,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:45:04,357 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:45:04,948 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-26 20:45:06,058 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 208 DAG size of output: 208 [2020-10-26 20:45:07,094 WARN L193 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 208 [2020-10-26 20:45:08,231 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 228 DAG size of output: 228 [2020-10-26 20:45:10,071 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 241 DAG size of output: 225 [2020-10-26 20:45:12,163 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 241 DAG size of output: 222 [2020-10-26 20:45:14,512 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 245 DAG size of output: 219 [2020-10-26 20:45:18,813 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 246 DAG size of output: 216 [2020-10-26 20:45:20,618 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 248 DAG size of output: 212 [2020-10-26 20:45:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:23,919 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:45:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:45:23,921 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 202 [2020-10-26 20:45:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:23,939 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:45:23,939 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:45:23,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:45:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:45:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:45:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:45:24,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:45:24,063 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 202 [2020-10-26 20:45:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:24,067 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:45:24,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:45:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:45:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-26 20:45:24,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:24,088 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:24,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:45:24,089 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:24,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:24,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1119319899, now seen corresponding path program 1 times [2020-10-26 20:45:24,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:24,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455139414] [2020-10-26 20:45:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:24,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:24,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:26,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:29,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:29,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-26 20:45:29,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:29,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-26 20:45:29,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:29,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 20:45:29,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:29,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-26 20:45:29,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 20:45:29,888 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-26 20:45:30,065 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-26 20:45:30,905 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:30,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:30,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:30,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:30,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:30,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:30,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 20:45:30,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:30,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:30,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:30,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:30,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:31,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:31,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:31,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:31,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:45:31,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:31,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 20:45:31,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:31,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:45:31,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:31,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:45:31,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:31,424 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-26 20:45:31,712 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-10-26 20:45:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:45:32,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455139414] [2020-10-26 20:45:32,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:32,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 20:45:32,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628734592] [2020-10-26 20:45:32,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 20:45:32,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:32,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 20:45:32,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:45:32,504 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 16 states. [2020-10-26 20:45:32,946 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-26 20:45:33,487 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 73 [2020-10-26 20:45:33,907 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-10-26 20:45:34,384 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 76 [2020-10-26 20:45:35,424 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 199 [2020-10-26 20:45:36,583 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 251 DAG size of output: 207 [2020-10-26 20:45:37,807 WARN L193 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 206 [2020-10-26 20:45:38,316 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-26 20:45:39,298 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 181 [2020-10-26 20:45:41,087 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 249 DAG size of output: 205 [2020-10-26 20:45:44,900 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 250 DAG size of output: 204 [2020-10-26 20:45:47,210 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-26 20:45:50,266 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 251 DAG size of output: 203 [2020-10-26 20:45:51,752 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 251 DAG size of output: 201 [2020-10-26 20:45:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:58,960 INFO L93 Difference]: Finished difference Result 1217 states and 1991 transitions. [2020-10-26 20:45:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 20:45:58,961 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 213 [2020-10-26 20:45:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:58,973 INFO L225 Difference]: With dead ends: 1217 [2020-10-26 20:45:58,974 INFO L226 Difference]: Without dead ends: 973 [2020-10-26 20:45:58,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2020-10-26 20:45:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-10-26 20:45:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 958. [2020-10-26 20:45:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 958 states. [2020-10-26 20:45:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1320 transitions. [2020-10-26 20:45:59,044 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1320 transitions. Word has length 213 [2020-10-26 20:45:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:59,045 INFO L481 AbstractCegarLoop]: Abstraction has 958 states and 1320 transitions. [2020-10-26 20:45:59,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 20:45:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1320 transitions. [2020-10-26 20:45:59,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-26 20:45:59,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:59,051 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:59,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:45:59,052 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:59,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:59,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1647918767, now seen corresponding path program 1 times [2020-10-26 20:45:59,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:59,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065074117] [2020-10-26 20:45:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:59,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:59,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:00,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:00,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-26 20:46:00,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:00,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 914 [2020-10-26 20:46:00,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:00,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:00,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:46:00,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 181 [2020-10-26 20:46:00,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:00,497 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:00,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:00,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:00,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:00,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:00,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:00,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:46:00,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:00,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:00,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:00,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:00,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:00,706 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:46:00,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:00,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:00,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:00,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:00,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:00,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-26 20:46:00,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:00,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:00,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:00,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:46:00,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 20:46:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:46:01,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065074117] [2020-10-26 20:46:01,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:01,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:46:01,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646076846] [2020-10-26 20:46:01,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:46:01,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:01,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:46:01,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:46:01,217 INFO L87 Difference]: Start difference. First operand 958 states and 1320 transitions. Second operand 5 states. [2020-10-26 20:46:01,697 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 20:46:04,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:04,969 INFO L93 Difference]: Finished difference Result 2333 states and 3384 transitions. [2020-10-26 20:46:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:46:04,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2020-10-26 20:46:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:04,976 INFO L225 Difference]: With dead ends: 2333 [2020-10-26 20:46:04,977 INFO L226 Difference]: Without dead ends: 946 [2020-10-26 20:46:04,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:46:04,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2020-10-26 20:46:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 946. [2020-10-26 20:46:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 946 states. [2020-10-26 20:46:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1246 transitions. [2020-10-26 20:46:05,024 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1246 transitions. Word has length 223 [2020-10-26 20:46:05,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:05,024 INFO L481 AbstractCegarLoop]: Abstraction has 946 states and 1246 transitions. [2020-10-26 20:46:05,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:46:05,025 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1246 transitions. [2020-10-26 20:46:05,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-26 20:46:05,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:05,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:05,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:46:05,031 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:05,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:05,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1538296984, now seen corresponding path program 1 times [2020-10-26 20:46:05,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:05,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867748858] [2020-10-26 20:46:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:05,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:05,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:07,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:07,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-26 20:46:07,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:07,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2029 [2020-10-26 20:46:07,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:07,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:46:07,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:07,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:46:07,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:07,387 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:07,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:07,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:07,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:07,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:07,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:07,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:46:07,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:07,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:07,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:07,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:07,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:07,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:07,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:07,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:07,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:46:07,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:07,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-26 20:46:07,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:07,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:07,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:46:07,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:46:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:46:07,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867748858] [2020-10-26 20:46:07,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:46:07,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:46:07,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025318234] [2020-10-26 20:46:07,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:07,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:07,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:07,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:07,905 INFO L87 Difference]: Start difference. First operand 946 states and 1246 transitions. Second operand 7 states. [2020-10-26 20:46:08,238 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:46:08,775 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:46:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:12,584 INFO L93 Difference]: Finished difference Result 2256 states and 3129 transitions. [2020-10-26 20:46:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:46:12,585 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 234 [2020-10-26 20:46:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:12,597 INFO L225 Difference]: With dead ends: 2256 [2020-10-26 20:46:12,597 INFO L226 Difference]: Without dead ends: 1419 [2020-10-26 20:46:12,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:46:12,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2020-10-26 20:46:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1404. [2020-10-26 20:46:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2020-10-26 20:46:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1862 transitions. [2020-10-26 20:46:12,681 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1862 transitions. Word has length 234 [2020-10-26 20:46:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:12,682 INFO L481 AbstractCegarLoop]: Abstraction has 1404 states and 1862 transitions. [2020-10-26 20:46:12,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:46:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1862 transitions. [2020-10-26 20:46:12,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-26 20:46:12,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:12,691 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:12,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:46:12,692 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:12,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:12,692 INFO L82 PathProgramCache]: Analyzing trace with hash 926255957, now seen corresponding path program 1 times [2020-10-26 20:46:12,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:12,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602419230] [2020-10-26 20:46:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:12,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:13,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:14,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:15,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:15,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-26 20:46:15,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:46:15,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2701 [2020-10-26 20:46:15,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:15,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:46:15,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:15,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-10-26 20:46:15,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 20:46:15,950 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:15,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:15,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:15,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:15,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:15,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:15,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:46:15,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:15,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:15,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:15,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:15,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:16,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:16,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:16,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:16,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:46:16,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:16,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-26 20:46:16,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:16,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:46:16,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:16,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:46:16,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:46:16,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602419230] [2020-10-26 20:46:16,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:16,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:46:16,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901595882] [2020-10-26 20:46:16,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:46:16,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:16,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:46:16,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:46:16,791 INFO L87 Difference]: Start difference. First operand 1404 states and 1862 transitions. Second operand 8 states. [2020-10-26 20:46:17,066 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:17,815 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 20:46:22,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:22,296 INFO L93 Difference]: Finished difference Result 4192 states and 5949 transitions. [2020-10-26 20:46:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:46:22,303 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 237 [2020-10-26 20:46:22,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:22,321 INFO L225 Difference]: With dead ends: 4192 [2020-10-26 20:46:22,321 INFO L226 Difference]: Without dead ends: 2535 [2020-10-26 20:46:22,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:46:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2020-10-26 20:46:22,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 2507. [2020-10-26 20:46:22,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2507 states. [2020-10-26 20:46:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 3472 transitions. [2020-10-26 20:46:22,440 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 3472 transitions. Word has length 237 [2020-10-26 20:46:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:22,440 INFO L481 AbstractCegarLoop]: Abstraction has 2507 states and 3472 transitions. [2020-10-26 20:46:22,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:46:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 3472 transitions. [2020-10-26 20:46:22,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-26 20:46:22,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:22,453 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:22,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:46:22,454 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:22,454 INFO L82 PathProgramCache]: Analyzing trace with hash -521625543, now seen corresponding path program 1 times [2020-10-26 20:46:22,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:22,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920293401] [2020-10-26 20:46:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:22,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:24,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:26,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:26,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-10-26 20:46:26,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:26,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4251 [2020-10-26 20:46:26,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:26,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 20:46:26,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:26,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 243 [2020-10-26 20:46:26,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:27,961 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-10-26 20:46:28,231 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 75 [2020-10-26 20:46:28,474 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-26 20:46:28,703 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-10-26 20:46:28,905 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-26 20:46:29,061 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-10-26 20:46:29,358 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:29,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:29,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:29,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:29,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:29,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:29,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:46:29,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:29,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:29,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:29,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:29,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:29,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:29,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:29,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:29,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:46:29,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:29,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-26 20:46:29,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:29,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:46:29,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:29,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:46:29,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:30,388 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-26 20:46:30,707 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 89 [2020-10-26 20:46:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:46:32,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920293401] [2020-10-26 20:46:32,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:32,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 20:46:32,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630252498] [2020-10-26 20:46:32,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 20:46:32,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:32,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 20:46:32,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:46:32,344 INFO L87 Difference]: Start difference. First operand 2507 states and 3472 transitions. Second operand 16 states. [2020-10-26 20:46:32,754 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-26 20:46:34,790 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 87 [2020-10-26 20:46:35,186 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 74 [2020-10-26 20:46:35,679 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 98 [2020-10-26 20:46:36,848 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 248 DAG size of output: 214 [2020-10-26 20:46:38,123 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 268 DAG size of output: 234 [2020-10-26 20:46:40,501 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 273 DAG size of output: 231 [2020-10-26 20:46:42,965 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 274 DAG size of output: 228 [2020-10-26 20:46:45,476 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 274 DAG size of output: 225 [2020-10-26 20:46:48,595 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 275 DAG size of output: 222 [2020-10-26 20:46:48,947 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-10-26 20:46:51,099 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 275 DAG size of output: 218 [2020-10-26 20:46:53,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:53,332 INFO L93 Difference]: Finished difference Result 4654 states and 6680 transitions. [2020-10-26 20:46:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 20:46:53,333 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 302 [2020-10-26 20:46:53,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:53,354 INFO L225 Difference]: With dead ends: 4654 [2020-10-26 20:46:53,354 INFO L226 Difference]: Without dead ends: 2825 [2020-10-26 20:46:53,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-10-26 20:46:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2020-10-26 20:46:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 2662. [2020-10-26 20:46:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2662 states. [2020-10-26 20:46:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3670 transitions. [2020-10-26 20:46:53,481 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3670 transitions. Word has length 302 [2020-10-26 20:46:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:53,482 INFO L481 AbstractCegarLoop]: Abstraction has 2662 states and 3670 transitions. [2020-10-26 20:46:53,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 20:46:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3670 transitions. [2020-10-26 20:46:53,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-10-26 20:46:53,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:53,499 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:53,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:46:53,499 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:53,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1142714488, now seen corresponding path program 1 times [2020-10-26 20:46:53,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:53,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505503912] [2020-10-26 20:46:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:53,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:53,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:55,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:56,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:58,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:58,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 336 [2020-10-26 20:46:58,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:46:58,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4878 [2020-10-26 20:46:58,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:58,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:46:58,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:58,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-26 20:46:58,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:58,834 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:58,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:58,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:58,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:58,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:58,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:58,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:46:58,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:58,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:58,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:58,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:58,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:58,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:59,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:59,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:59,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 20:46:59,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:59,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-26 20:46:59,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:59,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:59,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:59,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-26 20:46:59,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:59,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-10-26 20:46:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:59,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:59,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:59,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:46:59,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:59,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 20:46:59,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:59,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:59,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:59,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:46:59,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 20:46:59,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505503912] [2020-10-26 20:46:59,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:59,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:46:59,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102413481] [2020-10-26 20:46:59,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:59,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:59,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:59,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:59,795 INFO L87 Difference]: Start difference. First operand 2662 states and 3670 transitions. Second operand 7 states. [2020-10-26 20:47:00,060 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:47:01,031 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:47:03,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:03,905 INFO L93 Difference]: Finished difference Result 6476 states and 9569 transitions. [2020-10-26 20:47:03,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:47:03,906 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 322 [2020-10-26 20:47:03,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:03,931 INFO L225 Difference]: With dead ends: 6476 [2020-10-26 20:47:03,931 INFO L226 Difference]: Without dead ends: 4060 [2020-10-26 20:47:03,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:47:03,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2020-10-26 20:47:04,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 3988. [2020-10-26 20:47:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3988 states. [2020-10-26 20:47:04,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 5284 transitions. [2020-10-26 20:47:04,105 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 5284 transitions. Word has length 322 [2020-10-26 20:47:04,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:04,106 INFO L481 AbstractCegarLoop]: Abstraction has 3988 states and 5284 transitions. [2020-10-26 20:47:04,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 5284 transitions. [2020-10-26 20:47:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-26 20:47:04,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:04,126 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:04,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:47:04,127 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:04,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:04,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1857883889, now seen corresponding path program 1 times [2020-10-26 20:47:04,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:04,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520617783] [2020-10-26 20:47:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:04,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:04,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:05,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:07,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:08,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:08,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 344 [2020-10-26 20:47:08,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:47:08,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3949 [2020-10-26 20:47:08,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:08,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:47:08,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:08,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 316 [2020-10-26 20:47:08,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:08,650 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:08,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:08,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:08,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:08,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:08,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:08,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:47:08,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:08,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:08,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:08,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:08,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:08,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:08,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:09,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:09,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:47:09,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:09,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-26 20:47:09,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:09,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:09,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:09,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:47:09,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:09,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:47:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:09,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:09,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:09,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 20:47:09,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:09,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 20:47:09,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:09,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:47:09,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:09,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 20:47:09,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:47:09,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520617783] [2020-10-26 20:47:09,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:09,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:47:09,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016917017] [2020-10-26 20:47:09,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:47:09,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:09,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:47:09,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:47:09,798 INFO L87 Difference]: Start difference. First operand 3988 states and 5284 transitions. Second operand 9 states. [2020-10-26 20:47:10,086 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:47:11,172 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 20:47:12,016 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 20:47:17,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:17,104 INFO L93 Difference]: Finished difference Result 10693 states and 16448 transitions. [2020-10-26 20:47:17,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 20:47:17,105 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 330 [2020-10-26 20:47:17,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:17,149 INFO L225 Difference]: With dead ends: 10693 [2020-10-26 20:47:17,150 INFO L226 Difference]: Without dead ends: 7006 [2020-10-26 20:47:17,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-26 20:47:17,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7006 states. [2020-10-26 20:47:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7006 to 6855. [2020-10-26 20:47:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6855 states. [2020-10-26 20:47:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 9452 transitions. [2020-10-26 20:47:17,508 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 9452 transitions. Word has length 330 [2020-10-26 20:47:17,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:17,509 INFO L481 AbstractCegarLoop]: Abstraction has 6855 states and 9452 transitions. [2020-10-26 20:47:17,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:47:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 9452 transitions. [2020-10-26 20:47:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-10-26 20:47:17,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:17,535 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:17,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:47:17,536 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:17,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1798757377, now seen corresponding path program 1 times [2020-10-26 20:47:17,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:17,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413633975] [2020-10-26 20:47:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:17,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:17,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:20,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:20,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:22,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:22,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:22,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 354 [2020-10-26 20:47:22,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:47:22,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5136 [2020-10-26 20:47:22,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:22,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:47:22,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:22,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 345 [2020-10-26 20:47:22,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:23,297 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:23,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:23,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:23,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:23,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:23,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:23,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:47:23,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:23,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:23,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:23,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:23,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:23,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:23,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:47:23,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:23,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:47:23,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:23,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:23,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:23,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:47:23,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:23,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:47:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:23,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:23,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:23,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 20:47:23,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:23,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 387 [2020-10-26 20:47:23,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:23,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:23,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:23,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-26 20:47:23,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 20:47:24,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413633975] [2020-10-26 20:47:24,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:24,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:47:24,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173936768] [2020-10-26 20:47:24,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:47:24,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:24,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:47:24,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:47:24,215 INFO L87 Difference]: Start difference. First operand 6855 states and 9452 transitions. Second operand 7 states. [2020-10-26 20:47:24,488 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:47:25,931 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:47:29,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:29,618 INFO L93 Difference]: Finished difference Result 20864 states and 33520 transitions. [2020-10-26 20:47:29,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:47:29,618 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 340 [2020-10-26 20:47:29,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:29,722 INFO L225 Difference]: With dead ends: 20864 [2020-10-26 20:47:29,722 INFO L226 Difference]: Without dead ends: 15809 [2020-10-26 20:47:29,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:47:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15809 states. [2020-10-26 20:47:30,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15809 to 15643. [2020-10-26 20:47:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15643 states. [2020-10-26 20:47:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15643 states to 15643 states and 22393 transitions. [2020-10-26 20:47:30,632 INFO L78 Accepts]: Start accepts. Automaton has 15643 states and 22393 transitions. Word has length 340 [2020-10-26 20:47:30,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:30,633 INFO L481 AbstractCegarLoop]: Abstraction has 15643 states and 22393 transitions. [2020-10-26 20:47:30,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:30,633 INFO L276 IsEmpty]: Start isEmpty. Operand 15643 states and 22393 transitions. [2020-10-26 20:47:30,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-10-26 20:47:30,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:30,702 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:30,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:47:30,703 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:30,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:30,704 INFO L82 PathProgramCache]: Analyzing trace with hash -757323456, now seen corresponding path program 1 times [2020-10-26 20:47:30,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:30,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224421001] [2020-10-26 20:47:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:30,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:31,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:31,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:33,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:35,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:35,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-26 20:47:35,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:47:35,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-26 20:47:35,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:35,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:47:35,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:35,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 329 [2020-10-26 20:47:35,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:36,546 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:36,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:36,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:36,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:36,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:36,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:36,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:47:36,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:36,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:36,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:36,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:36,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:36,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:36,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:36,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:36,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 20:47:36,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:36,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-26 20:47:36,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:36,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:36,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:36,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-26 20:47:36,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:36,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-10-26 20:47:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:36,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:37,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:37,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:47:37,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:37,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-26 20:47:37,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:37,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:47:37,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:37,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:47:37,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:47:37,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224421001] [2020-10-26 20:47:37,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:37,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:47:37,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434485381] [2020-10-26 20:47:37,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:47:37,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:37,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:47:37,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:47:37,654 INFO L87 Difference]: Start difference. First operand 15643 states and 22393 transitions. Second operand 9 states. [2020-10-26 20:47:37,920 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:47:38,979 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 20:47:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:43,439 INFO L93 Difference]: Finished difference Result 35704 states and 54280 transitions. [2020-10-26 20:47:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:47:43,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 343 [2020-10-26 20:47:43,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:43,527 INFO L225 Difference]: With dead ends: 35704 [2020-10-26 20:47:43,528 INFO L226 Difference]: Without dead ends: 21171 [2020-10-26 20:47:43,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:47:43,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21171 states. [2020-10-26 20:47:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21171 to 20863. [2020-10-26 20:47:44,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20863 states. [2020-10-26 20:47:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20863 states to 20863 states and 29233 transitions. [2020-10-26 20:47:44,322 INFO L78 Accepts]: Start accepts. Automaton has 20863 states and 29233 transitions. Word has length 343 [2020-10-26 20:47:44,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:44,323 INFO L481 AbstractCegarLoop]: Abstraction has 20863 states and 29233 transitions. [2020-10-26 20:47:44,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:47:44,323 INFO L276 IsEmpty]: Start isEmpty. Operand 20863 states and 29233 transitions. [2020-10-26 20:47:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-10-26 20:47:44,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:44,382 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:44,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:47:44,383 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:44,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:44,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1388528114, now seen corresponding path program 1 times [2020-10-26 20:47:44,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:44,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034214447] [2020-10-26 20:47:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:44,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:45,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:46,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:49,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:49,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 371 [2020-10-26 20:47:49,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:47:49,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 20:47:49,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 20:47:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 253 [2020-10-26 20:47:49,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:50,570 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-26 20:47:50,753 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-26 20:47:50,913 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-10-26 20:47:51,054 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-26 20:47:51,433 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:51,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:51,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:51,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:51,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:51,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:51,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:47:51,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:51,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:51,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:51,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:51,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:51,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:51,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:51,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:51,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:47:51,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:51,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 20:47:51,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:51,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:47:51,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:51,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:47:51,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:51,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:47:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:51,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:52,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:52,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-26 20:47:52,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:52,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-26 20:47:52,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:52,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:47:52,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:52,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-26 20:47:52,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 60 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:47:53,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034214447] [2020-10-26 20:47:53,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:53,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 20:47:53,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866325704] [2020-10-26 20:47:53,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 20:47:53,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:53,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 20:47:53,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-10-26 20:47:53,933 INFO L87 Difference]: Start difference. First operand 20863 states and 29233 transitions. Second operand 19 states. [2020-10-26 20:47:54,846 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 169 [2020-10-26 20:47:55,190 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-26 20:47:57,907 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 80 [2020-10-26 20:47:58,299 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-26 20:47:58,798 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 89 [2020-10-26 20:48:00,071 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 227 DAG size of output: 202 [2020-10-26 20:48:01,287 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 239 DAG size of output: 210 [2020-10-26 20:48:02,667 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 238 DAG size of output: 209 [2020-10-26 20:48:04,118 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 236 DAG size of output: 208 [2020-10-26 20:48:04,671 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-26 20:48:07,004 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 237 DAG size of output: 207 [2020-10-26 20:48:09,075 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 238 DAG size of output: 206 [2020-10-26 20:48:11,333 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 240 DAG size of output: 204 [2020-10-26 20:48:13,707 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-10-26 20:48:15,069 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-26 20:48:15,446 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-26 20:48:16,182 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-26 20:48:17,150 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2020-10-26 20:48:17,911 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 173 [2020-10-26 20:48:18,281 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2020-10-26 20:48:18,529 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-26 20:48:19,972 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-26 20:48:21,358 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 176 [2020-10-26 20:48:23,457 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2020-10-26 20:48:24,598 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 84 [2020-10-26 20:48:24,859 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-26 20:48:25,156 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-26 20:48:26,439 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 224 DAG size of output: 205