/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/Problem17_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:06:50,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:06:50,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:06:50,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:06:50,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:06:50,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:06:50,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:06:50,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:06:50,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:06:50,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:06:50,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:06:50,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:06:50,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:06:50,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:06:50,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:06:50,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:06:50,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:06:50,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:06:50,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:06:50,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:06:50,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:06:50,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:06:50,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:06:50,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:06:50,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:06:50,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:06:50,270 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:06:50,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:06:50,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:06:50,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:06:50,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:06:50,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:06:50,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:06:50,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:06:50,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:06:50,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:06:50,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:06:50,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:06:50,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:06:50,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:06:50,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:06:50,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 00:06:50,350 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:06:50,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:06:50,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:06:50,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:06:50,356 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:06:50,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:06:50,357 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:06:50,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:06:50,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:06:50,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:06:50,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:06:50,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:06:50,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:06:50,360 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:06:50,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:06:50,360 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:06:50,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:06:50,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:06:50,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:06:50,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:06:50,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:06:50,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:06:50,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:06:50,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:06:50,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:06:50,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:06:50,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:06:50,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:06:50,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:06:50,364 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:06:50,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:06:50,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:06:50,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:06:50,856 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:06:50,856 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:06:50,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label09.c [2020-10-27 00:06:50,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/748362d70/d45c5cd8c6bf47998439cec61795cf82/FLAG760e12976 [2020-10-27 00:06:51,957 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:06:51,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label09.c [2020-10-27 00:06:51,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/748362d70/d45c5cd8c6bf47998439cec61795cf82/FLAG760e12976 [2020-10-27 00:06:52,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/748362d70/d45c5cd8c6bf47998439cec61795cf82 [2020-10-27 00:06:52,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:06:52,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:06:52,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:06:52,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:06:52,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:06:52,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:06:52" (1/1) ... [2020-10-27 00:06:52,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c57453f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:52, skipping insertion in model container [2020-10-27 00:06:52,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:06:52" (1/1) ... [2020-10-27 00:06:52,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:06:52,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:06:53,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:06:53,687 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:06:54,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:06:54,183 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:06:54,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:54 WrapperNode [2020-10-27 00:06:54,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:06:54,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:06:54,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:06:54,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:06:54,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:54" (1/1) ... [2020-10-27 00:06:54,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:54" (1/1) ... [2020-10-27 00:06:54,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:54" (1/1) ... [2020-10-27 00:06:54,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:54" (1/1) ... [2020-10-27 00:06:54,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:54" (1/1) ... [2020-10-27 00:06:54,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:54" (1/1) ... [2020-10-27 00:06:54,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:54" (1/1) ... [2020-10-27 00:06:54,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:06:54,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:06:54,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:06:54,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:06:54,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:06:54,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:06:54,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:06:54,661 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:06:54,661 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:06:54,662 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:06:54,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:06:54,662 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:06:54,662 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:06:54,662 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:06:54,663 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:06:54,663 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:06:54,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:06:54,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:06:54,663 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:06:54,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:06:54,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:06:54,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:06:54,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:06:54,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:06:54,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:06:54,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:07:04,142 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:07:04,142 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:07:04,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:07:04 BoogieIcfgContainer [2020-10-27 00:07:04,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:07:04,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:07:04,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:07:04,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:07:04,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:06:52" (1/3) ... [2020-10-27 00:07:04,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2292551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:07:04, skipping insertion in model container [2020-10-27 00:07:04,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:54" (2/3) ... [2020-10-27 00:07:04,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2292551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:07:04, skipping insertion in model container [2020-10-27 00:07:04,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:07:04" (3/3) ... [2020-10-27 00:07:04,157 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label09.c [2020-10-27 00:07:04,172 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:07:04,179 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:07:04,195 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:07:04,231 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:07:04,231 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:07:04,232 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:07:04,232 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:07:04,232 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:07:04,232 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:07:04,232 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:07:04,233 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:07:04,269 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:07:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 00:07:04,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:07:04,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:07:04,278 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:07:04,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:07:04,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1958731461, now seen corresponding path program 1 times [2020-10-27 00:07:04,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:07:04,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260896398] [2020-10-27 00:07:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:07:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:04,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:05,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:05,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 00:07:05,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:05,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-27 00:07:05,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:05,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:07:05,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:07:05,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 00:07:05,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:07:05,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:07:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:05,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:05,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:05,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:07:05,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:05,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 00:07:05,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:05,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:07:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:07:05,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:07:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:07:05,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260896398] [2020-10-27 00:07:05,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:07:05,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:07:05,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232895865] [2020-10-27 00:07:05,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:07:05,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:07:05,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:07:05,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:07:05,374 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:07:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:07:17,842 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 00:07:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:07:17,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-27 00:07:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:07:17,883 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 00:07:17,884 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 00:07:17,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:07:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 00:07:18,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 00:07:18,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 00:07:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 00:07:18,114 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 19 [2020-10-27 00:07:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:07:18,115 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 00:07:18,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:07:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 00:07:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 00:07:18,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:07:18,125 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 00:07:18,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:07:18,126 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:07:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:07:18,129 INFO L82 PathProgramCache]: Analyzing trace with hash 509827258, now seen corresponding path program 1 times [2020-10-27 00:07:18,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:07:18,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127058203] [2020-10-27 00:07:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:07:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:18,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:18,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:19,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:19,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:19,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:07:19,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:07:19,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1663 [2020-10-27 00:07:19,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:19,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:07:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:07:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:07:19,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:07:20,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:07:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:20,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:20,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:20,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:07:20,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:20,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 00:07:20,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:20,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:07:20,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:20,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:07:20,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:07:20,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:07:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:20,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:20,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:20,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:07:20,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:20,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-27 00:07:20,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:20,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:07:20,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:07:20,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:07:20,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:07:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:07:20,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127058203] [2020-10-27 00:07:20,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:07:20,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:07:20,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388388676] [2020-10-27 00:07:20,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:07:20,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:07:20,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:07:20,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:07:20,569 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-27 00:07:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:07:35,226 INFO L93 Difference]: Finished difference Result 2466 states and 3913 transitions. [2020-10-27 00:07:35,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:07:35,227 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 90 [2020-10-27 00:07:35,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:07:35,237 INFO L225 Difference]: With dead ends: 2466 [2020-10-27 00:07:35,238 INFO L226 Difference]: Without dead ends: 1480 [2020-10-27 00:07:35,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:07:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2020-10-27 00:07:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1442. [2020-10-27 00:07:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2020-10-27 00:07:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1871 transitions. [2020-10-27 00:07:35,306 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1871 transitions. Word has length 90 [2020-10-27 00:07:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:07:35,306 INFO L481 AbstractCegarLoop]: Abstraction has 1442 states and 1871 transitions. [2020-10-27 00:07:35,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:07:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1871 transitions. [2020-10-27 00:07:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 00:07:35,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:07:35,310 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 00:07:35,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:07:35,310 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:07:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:07:35,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2108306257, now seen corresponding path program 1 times [2020-10-27 00:07:35,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:07:35,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90078714] [2020-10-27 00:07:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:07:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:35,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:35,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:35,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 00:07:35,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:35,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-27 00:07:35,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:35,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:07:35,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 00:07:35,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 00:07:35,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:35,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:07:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:35,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:35,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:35,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:07:35,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:35,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:07:35,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:35,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:07:35,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:35,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:07:35,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:35,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:07:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:35,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:35,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:35,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:07:35,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:35,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-27 00:07:35,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:07:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:35,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 00:07:35,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:07:36,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90078714] [2020-10-27 00:07:36,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:07:36,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:07:36,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262280593] [2020-10-27 00:07:36,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:07:36,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:07:36,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:07:36,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:07:36,039 INFO L87 Difference]: Start difference. First operand 1442 states and 1871 transitions. Second operand 5 states. [2020-10-27 00:07:50,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:07:50,176 INFO L93 Difference]: Finished difference Result 3350 states and 4601 transitions. [2020-10-27 00:07:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:07:50,178 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-10-27 00:07:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:07:50,193 INFO L225 Difference]: With dead ends: 3350 [2020-10-27 00:07:50,194 INFO L226 Difference]: Without dead ends: 1901 [2020-10-27 00:07:50,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:07:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2020-10-27 00:07:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1886. [2020-10-27 00:07:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2020-10-27 00:07:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2310 transitions. [2020-10-27 00:07:50,320 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2310 transitions. Word has length 93 [2020-10-27 00:07:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:07:50,321 INFO L481 AbstractCegarLoop]: Abstraction has 1886 states and 2310 transitions. [2020-10-27 00:07:50,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:07:50,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2310 transitions. [2020-10-27 00:07:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-27 00:07:50,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:07:50,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:07:50,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:07:50,334 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:07:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:07:50,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2043178593, now seen corresponding path program 1 times [2020-10-27 00:07:50,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:07:50,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063433505] [2020-10-27 00:07:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:07:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:50,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:50,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:51,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:51,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 00:07:51,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:07:51,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1076 [2020-10-27 00:07:51,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:51,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:07:51,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:07:51,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:07:51,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:51,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:07:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:51,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:51,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:51,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:07:51,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:51,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:07:51,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:51,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:07:51,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:51,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:07:51,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:51,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:07:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:51,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:51,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:51,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:07:51,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:51,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-27 00:07:51,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:51,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:07:51,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:51,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:07:51,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:51,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:07:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:51,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:52,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:52,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:07:52,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:52,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-27 00:07:52,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:52,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:07:52,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:07:52,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:07:52,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:07:52,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063433505] [2020-10-27 00:07:52,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:07:52,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:07:52,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463376227] [2020-10-27 00:07:52,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:07:52,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:07:52,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:07:52,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:07:52,235 INFO L87 Difference]: Start difference. First operand 1886 states and 2310 transitions. Second operand 7 states. [2020-10-27 00:08:07,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:08:07,314 INFO L93 Difference]: Finished difference Result 4692 states and 5963 transitions. [2020-10-27 00:08:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:08:07,315 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 179 [2020-10-27 00:08:07,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:08:07,340 INFO L225 Difference]: With dead ends: 4692 [2020-10-27 00:08:07,341 INFO L226 Difference]: Without dead ends: 3245 [2020-10-27 00:08:07,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:08:07,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2020-10-27 00:08:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2801. [2020-10-27 00:08:07,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2801 states. [2020-10-27 00:08:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 3435 transitions. [2020-10-27 00:08:07,467 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 3435 transitions. Word has length 179 [2020-10-27 00:08:07,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:08:07,469 INFO L481 AbstractCegarLoop]: Abstraction has 2801 states and 3435 transitions. [2020-10-27 00:08:07,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:08:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 3435 transitions. [2020-10-27 00:08:07,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 00:08:07,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:08:07,476 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:08:07,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:08:07,476 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:08:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:08:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash 821008259, now seen corresponding path program 1 times [2020-10-27 00:08:07,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:08:07,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097226189] [2020-10-27 00:08:07,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:08:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:07,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:07,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:11,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:11,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-27 00:08:11,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:08:11,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4211 [2020-10-27 00:08:11,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:08:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:08:11,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 00:08:11,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:11,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:08:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:11,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:11,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:11,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:08:11,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:11,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 00:08:11,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:11,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:08:11,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:11,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:08:11,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:11,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:08:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:12,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:12,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:12,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:08:12,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:12,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-27 00:08:12,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:12,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:08:12,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:08:12,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:08:12,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:08:12,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:08:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:12,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:12,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:12,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:08:12,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:12,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-27 00:08:12,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:12,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:12,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:08:12,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:08:12,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 26 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:08:13,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097226189] [2020-10-27 00:08:13,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:08:13,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:08:13,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371094467] [2020-10-27 00:08:13,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:08:13,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:08:13,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:08:13,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:08:13,243 INFO L87 Difference]: Start difference. First operand 2801 states and 3435 transitions. Second operand 10 states. [2020-10-27 00:08:13,426 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:08:43,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:08:43,900 INFO L93 Difference]: Finished difference Result 8017 states and 10277 transitions. [2020-10-27 00:08:43,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 00:08:43,902 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 181 [2020-10-27 00:08:43,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:08:43,939 INFO L225 Difference]: With dead ends: 8017 [2020-10-27 00:08:43,939 INFO L226 Difference]: Without dead ends: 5655 [2020-10-27 00:08:43,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-10-27 00:08:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5655 states. [2020-10-27 00:08:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5655 to 5148. [2020-10-27 00:08:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5148 states. [2020-10-27 00:08:44,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5148 states to 5148 states and 6476 transitions. [2020-10-27 00:08:44,160 INFO L78 Accepts]: Start accepts. Automaton has 5148 states and 6476 transitions. Word has length 181 [2020-10-27 00:08:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:08:44,161 INFO L481 AbstractCegarLoop]: Abstraction has 5148 states and 6476 transitions. [2020-10-27 00:08:44,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:08:44,161 INFO L276 IsEmpty]: Start isEmpty. Operand 5148 states and 6476 transitions. [2020-10-27 00:08:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-27 00:08:44,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:08:44,165 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:08:44,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:08:44,166 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:08:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:08:44,167 INFO L82 PathProgramCache]: Analyzing trace with hash -943234739, now seen corresponding path program 1 times [2020-10-27 00:08:44,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:08:44,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264558110] [2020-10-27 00:08:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:08:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:44,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:44,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:48,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:49,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:49,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-27 00:08:49,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:08:49,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 00:08:49,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:49,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:08:49,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:08:49,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-27 00:08:49,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:49,441 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:08:49,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:08:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:49,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:49,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:49,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:08:49,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:49,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 00:08:49,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:49,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:08:49,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:49,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:08:49,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:49,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:08:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:49,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:49,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:49,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:08:49,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:49,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-27 00:08:49,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:49,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:08:49,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:49,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:08:49,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:49,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:08:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:49,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:49,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:50,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:50,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:08:50,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:08:50,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-27 00:08:50,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:50,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:50,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:08:50,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:08:50,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 92 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:08:50,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264558110] [2020-10-27 00:08:50,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:08:50,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:08:50,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838353564] [2020-10-27 00:08:50,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:08:50,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:08:50,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:08:50,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:08:50,248 INFO L87 Difference]: Start difference. First operand 5148 states and 6476 transitions. Second operand 6 states. [2020-10-27 00:09:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:09:05,153 INFO L93 Difference]: Finished difference Result 10314 states and 12992 transitions. [2020-10-27 00:09:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:09:05,157 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 192 [2020-10-27 00:09:05,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:09:05,190 INFO L225 Difference]: With dead ends: 10314 [2020-10-27 00:09:05,191 INFO L226 Difference]: Without dead ends: 5172 [2020-10-27 00:09:05,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:09:05,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2020-10-27 00:09:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 5142. [2020-10-27 00:09:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5142 states. [2020-10-27 00:09:05,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 6436 transitions. [2020-10-27 00:09:05,386 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 6436 transitions. Word has length 192 [2020-10-27 00:09:05,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:09:05,388 INFO L481 AbstractCegarLoop]: Abstraction has 5142 states and 6436 transitions. [2020-10-27 00:09:05,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:09:05,389 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 6436 transitions. [2020-10-27 00:09:05,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-27 00:09:05,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:09:05,394 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:09:05,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:09:05,394 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:09:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:09:05,395 INFO L82 PathProgramCache]: Analyzing trace with hash -805956601, now seen corresponding path program 1 times [2020-10-27 00:09:05,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:09:05,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190462056] [2020-10-27 00:09:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:09:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:05,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:05,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:05,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:10,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:10,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-27 00:09:10,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:09:10,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 00:09:10,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:09:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:09:10,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-27 00:09:10,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:09:10,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:09:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:10,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:10,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:10,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:09:10,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:10,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:09:10,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:10,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:09:10,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:09:10,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:09:10,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:10,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:09:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:10,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:10,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:10,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:09:10,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:10,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 00:09:10,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:10,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:09:10,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:09:10,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:09:10,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:10,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:09:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:11,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:11,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:11,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 00:09:11,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:11,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-27 00:09:11,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:11,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:09:11,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:09:11,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 00:09:11,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:09:11,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-27 00:09:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:09:11,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:09:11,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:09:11,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:09:11,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:09:11,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-27 00:09:11,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:09:11,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:09:11,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:09:11,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:09:11,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:09:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 41 proven. 142 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-27 00:09:11,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190462056] [2020-10-27 00:09:11,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:09:11,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:09:11,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707534495] [2020-10-27 00:09:11,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:09:11,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:09:11,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:09:11,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:09:11,534 INFO L87 Difference]: Start difference. First operand 5142 states and 6436 transitions. Second operand 9 states. [2020-10-27 00:10:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:10:03,683 INFO L93 Difference]: Finished difference Result 19532 states and 25805 transitions. [2020-10-27 00:10:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 00:10:03,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 259 [2020-10-27 00:10:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:10:03,757 INFO L225 Difference]: With dead ends: 19532 [2020-10-27 00:10:03,757 INFO L226 Difference]: Without dead ends: 13942 [2020-10-27 00:10:03,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-10-27 00:10:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13942 states. [2020-10-27 00:10:04,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13942 to 13840. [2020-10-27 00:10:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13840 states. [2020-10-27 00:10:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13840 states to 13840 states and 17426 transitions. [2020-10-27 00:10:04,229 INFO L78 Accepts]: Start accepts. Automaton has 13840 states and 17426 transitions. Word has length 259 [2020-10-27 00:10:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:10:04,230 INFO L481 AbstractCegarLoop]: Abstraction has 13840 states and 17426 transitions. [2020-10-27 00:10:04,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:10:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 13840 states and 17426 transitions. [2020-10-27 00:10:04,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-27 00:10:04,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:10:04,236 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:10:04,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:10:04,236 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:10:04,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:10:04,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2049268304, now seen corresponding path program 1 times [2020-10-27 00:10:04,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:10:04,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654418097] [2020-10-27 00:10:04,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:10:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:04,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:04,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:06,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:08,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:08,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-27 00:10:08,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:10:08,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3805 [2020-10-27 00:10:08,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:08,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:10:08,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:10:08,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-27 00:10:08,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:08,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:10:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:08,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:08,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:08,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:10:08,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:08,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:10:08,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:08,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:10:08,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:10:08,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:10:08,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:08,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:10:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:08,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:08,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:08,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:10:08,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:08,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-27 00:10:08,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:08,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:10:08,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:10:08,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:10:08,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:08,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:10:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:08,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:08,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:08,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:10:08,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:08,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 00:10:08,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:08,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:10:08,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:10:08,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:10:08,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:08,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:10:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:08,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:09,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:09,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:10:09,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:09,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 00:10:09,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:09,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:10:09,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:10:09,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:10:09,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:10:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 182 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:10:09,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654418097] [2020-10-27 00:10:09,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:10:09,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:10:09,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615579186] [2020-10-27 00:10:09,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:10:09,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:10:09,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:10:09,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:10:09,267 INFO L87 Difference]: Start difference. First operand 13840 states and 17426 transitions. Second operand 10 states. [2020-10-27 00:10:09,466 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 00:10:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:10:34,281 INFO L93 Difference]: Finished difference Result 36914 states and 50311 transitions. [2020-10-27 00:10:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 00:10:34,283 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 267 [2020-10-27 00:10:34,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:10:34,394 INFO L225 Difference]: With dead ends: 36914 [2020-10-27 00:10:34,395 INFO L226 Difference]: Without dead ends: 22635 [2020-10-27 00:10:34,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-27 00:10:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22635 states. [2020-10-27 00:10:35,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22635 to 20901. [2020-10-27 00:10:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20901 states. [2020-10-27 00:10:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20901 states to 20901 states and 25322 transitions. [2020-10-27 00:10:35,203 INFO L78 Accepts]: Start accepts. Automaton has 20901 states and 25322 transitions. Word has length 267 [2020-10-27 00:10:35,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:10:35,204 INFO L481 AbstractCegarLoop]: Abstraction has 20901 states and 25322 transitions. [2020-10-27 00:10:35,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:10:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand 20901 states and 25322 transitions. [2020-10-27 00:10:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-27 00:10:35,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:10:35,210 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 3, 3, 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] [2020-10-27 00:10:35,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:10:35,211 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:10:35,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:10:35,212 INFO L82 PathProgramCache]: Analyzing trace with hash 314033903, now seen corresponding path program 1 times [2020-10-27 00:10:35,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:10:35,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648951556] [2020-10-27 00:10:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:10:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:35,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:35,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:35,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:36,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking...