/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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:19:08,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:19:08,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:19:08,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:19:08,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:19:08,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:19:08,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:19:08,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:19:08,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:19:08,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:19:08,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:19:08,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:19:08,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:19:08,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:19:08,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:19:08,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:19:08,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:19:08,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:19:08,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:19:08,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:19:08,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:19:08,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:19:08,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:19:08,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:19:08,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:19:08,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:19:08,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:19:08,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:19:08,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:19:08,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:19:08,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:19:08,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:19:08,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:19:08,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:19:08,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:19:08,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:19:08,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:19:08,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:19:08,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:19:08,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:19:08,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:19:08,503 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 00:19:08,543 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:19:08,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:19:08,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:19:08,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:19:08,549 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:19:08,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:19:08,550 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:19:08,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:19:08,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:19:08,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:19:08,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:19:08,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:19:08,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:19:08,551 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:19:08,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:19:08,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:19:08,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:19:08,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:19:08,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:19:08,553 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:19:08,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:19:08,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:19:08,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:19:08,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:19:08,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:19:08,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:19:08,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:19:08,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:19:08,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:19:08,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:19:09,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:19:09,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:19:09,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:19:09,054 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:19:09,054 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:19:09,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label54.c [2020-10-27 00:19:09,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e188d7e6/6f1b08a3972746439193315caa62572a/FLAGbb33da162 [2020-10-27 00:19:10,191 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:19:10,192 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label54.c [2020-10-27 00:19:10,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e188d7e6/6f1b08a3972746439193315caa62572a/FLAGbb33da162 [2020-10-27 00:19:10,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e188d7e6/6f1b08a3972746439193315caa62572a [2020-10-27 00:19:10,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:19:10,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:19:10,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:19:10,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:19:10,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:19:10,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:19:10" (1/1) ... [2020-10-27 00:19:10,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c76db6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:10, skipping insertion in model container [2020-10-27 00:19:10,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:19:10" (1/1) ... [2020-10-27 00:19:10,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:19:10,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:19:11,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:19:11,916 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:19:12,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:19:12,466 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:19:12,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:12 WrapperNode [2020-10-27 00:19:12,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:19:12,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:19:12,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:19:12,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:19:12,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:12" (1/1) ... [2020-10-27 00:19:12,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:12" (1/1) ... [2020-10-27 00:19:12,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:12" (1/1) ... [2020-10-27 00:19:12,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:12" (1/1) ... [2020-10-27 00:19:12,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:12" (1/1) ... [2020-10-27 00:19:12,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:12" (1/1) ... [2020-10-27 00:19:12,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:12" (1/1) ... [2020-10-27 00:19:12,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:19:12,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:19:12,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:19:12,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:19:12,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:12" (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 00:19:12,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:19:12,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:19:12,918 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:19:12,919 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:19:12,919 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:19:12,919 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:19:12,919 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:19:12,919 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:19:12,920 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:19:12,920 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:19:12,920 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:19:12,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:19:12,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:19:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:19:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:19:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:19:12,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:19:12,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:19:12,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:19:12,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:19:12,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:19:23,164 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:19:23,164 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:19:23,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:19:23 BoogieIcfgContainer [2020-10-27 00:19:23,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:19:23,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:19:23,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:19:23,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:19:23,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:19:10" (1/3) ... [2020-10-27 00:19:23,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b12100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:19:23, skipping insertion in model container [2020-10-27 00:19:23,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:12" (2/3) ... [2020-10-27 00:19:23,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b12100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:19:23, skipping insertion in model container [2020-10-27 00:19:23,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:19:23" (3/3) ... [2020-10-27 00:19:23,186 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label54.c [2020-10-27 00:19:23,208 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:19:23,216 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:19:23,235 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:19:23,294 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:19:23,294 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:19:23,294 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:19:23,294 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:19:23,294 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:19:23,295 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:19:23,295 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:19:23,295 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:19:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:19:23,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 00:19:23,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:23,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:23,359 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:23,367 INFO L82 PathProgramCache]: Analyzing trace with hash -592398350, now seen corresponding path program 1 times [2020-10-27 00:19:23,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:23,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585092130] [2020-10-27 00:19:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:23,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:24,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:24,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 00:19:24,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:24,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-27 00:19:24,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:19:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 00:19:24,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:19:24,452 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:19:24,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:24,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:24,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:24,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:24,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:24,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 00:19:24,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:24,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:24,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:24,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:24,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:24,528 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 00:19:24,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585092130] [2020-10-27 00:19:24,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:19:24,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:19:24,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20600667] [2020-10-27 00:19:24,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:19:24,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:24,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:19:24,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:19:24,570 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:19:38,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:38,253 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 00:19:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:19:38,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 00:19:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:38,320 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 00:19:38,321 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 00:19:38,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:19:38,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 00:19:38,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 00:19:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 00:19:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 00:19:38,565 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 20 [2020-10-27 00:19:38,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:38,566 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 00:19:38,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:19:38,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 00:19:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 00:19:38,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:38,575 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:38,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:19:38,576 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:38,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2051425682, now seen corresponding path program 1 times [2020-10-27 00:19:38,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:38,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838240737] [2020-10-27 00:19:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:38,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:39,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:40,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:40,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 00:19:40,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:19:40,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1466 [2020-10-27 00:19:40,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:40,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:19:40,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:40,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:19:40,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:19:40,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:40,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:40,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:40,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:40,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:40,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 00:19:40,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:40,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:40,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:40,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:40,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:40,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:40,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:40,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:40,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:19:40,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:40,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-27 00:19:40,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:40,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:40,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:40,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:19:40,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:19:40,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838240737] [2020-10-27 00:19:40,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:19:40,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:19:40,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833286238] [2020-10-27 00:19:40,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:19:40,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:40,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:19:40,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:19:40,582 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-27 00:19:40,769 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:19:56,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:56,756 INFO L93 Difference]: Finished difference Result 2964 states and 4573 transitions. [2020-10-27 00:19:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:19:56,757 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 91 [2020-10-27 00:19:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:56,770 INFO L225 Difference]: With dead ends: 2964 [2020-10-27 00:19:56,771 INFO L226 Difference]: Without dead ends: 1967 [2020-10-27 00:19:56,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:19:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2020-10-27 00:19:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1915. [2020-10-27 00:19:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1915 states. [2020-10-27 00:19:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2483 transitions. [2020-10-27 00:19:56,861 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2483 transitions. Word has length 91 [2020-10-27 00:19:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:56,862 INFO L481 AbstractCegarLoop]: Abstraction has 1915 states and 2483 transitions. [2020-10-27 00:19:56,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:19:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2483 transitions. [2020-10-27 00:19:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 00:19:56,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:56,865 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:56,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:19:56,866 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:56,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:56,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1353766561, now seen corresponding path program 1 times [2020-10-27 00:19:56,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:56,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44033131] [2020-10-27 00:19:56,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:56,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:57,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:57,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 00:19:57,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:57,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-27 00:19:57,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:57,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:57,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 00:19:57,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 00:19:57,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:57,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:57,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:57,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:57,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:57,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:57,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:19:57,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:57,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:19:57,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:57,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:19:57,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:57,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:57,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:57,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:57,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:19:57,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:57,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-27 00:19:57,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:57,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:57,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:57,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 00:19:57,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:19:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:19:57,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44033131] [2020-10-27 00:19:57,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:57,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:19:57,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923012215] [2020-10-27 00:19:57,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:19:57,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:57,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:19:57,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:19:57,774 INFO L87 Difference]: Start difference. First operand 1915 states and 2483 transitions. Second operand 5 states. [2020-10-27 00:20:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:15,183 INFO L93 Difference]: Finished difference Result 4732 states and 6292 transitions. [2020-10-27 00:20:15,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:20:15,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 94 [2020-10-27 00:20:15,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:15,201 INFO L225 Difference]: With dead ends: 4732 [2020-10-27 00:20:15,201 INFO L226 Difference]: Without dead ends: 2377 [2020-10-27 00:20:15,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:20:15,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2020-10-27 00:20:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2358. [2020-10-27 00:20:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2358 states. [2020-10-27 00:20:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 2901 transitions. [2020-10-27 00:20:15,327 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 2901 transitions. Word has length 94 [2020-10-27 00:20:15,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:15,333 INFO L481 AbstractCegarLoop]: Abstraction has 2358 states and 2901 transitions. [2020-10-27 00:20:15,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:20:15,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 2901 transitions. [2020-10-27 00:20:15,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-27 00:20:15,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:15,351 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 00:20:15,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:20:15,351 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:15,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1933479214, now seen corresponding path program 1 times [2020-10-27 00:20:15,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:15,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263450348] [2020-10-27 00:20:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:15,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:15,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:16,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:16,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 00:20:16,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:20:16,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1502 [2020-10-27 00:20:16,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:16,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:16,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:20:16,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:20:16,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:17,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:17,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:17,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:17,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:17,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:17,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 00:20:17,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:17,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:20:17,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:17,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:20:17,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:17,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:17,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:17,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:17,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:17,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:17,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-27 00:20:17,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:20:17,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:17,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:17,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:17,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:17,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:20:17,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:17,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-27 00:20:17,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:17,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:17,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:17,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:20:17,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:20:17,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263450348] [2020-10-27 00:20:17,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:17,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:20:17,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913906301] [2020-10-27 00:20:17,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:20:17,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:17,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:20:17,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:20:17,660 INFO L87 Difference]: Start difference. First operand 2358 states and 2901 transitions. Second operand 7 states. [2020-10-27 00:20:23,269 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:20:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:36,165 INFO L93 Difference]: Finished difference Result 6082 states and 7751 transitions. [2020-10-27 00:20:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:20:36,166 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 180 [2020-10-27 00:20:36,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:36,190 INFO L225 Difference]: With dead ends: 6082 [2020-10-27 00:20:36,191 INFO L226 Difference]: Without dead ends: 3730 [2020-10-27 00:20:36,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:20:36,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3730 states. [2020-10-27 00:20:36,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3730 to 3717. [2020-10-27 00:20:36,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3717 states. [2020-10-27 00:20:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 4547 transitions. [2020-10-27 00:20:36,333 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 4547 transitions. Word has length 180 [2020-10-27 00:20:36,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:36,335 INFO L481 AbstractCegarLoop]: Abstraction has 3717 states and 4547 transitions. [2020-10-27 00:20:36,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:20:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 4547 transitions. [2020-10-27 00:20:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-27 00:20:36,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:36,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 00:20:36,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:20:36,343 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:36,344 INFO L82 PathProgramCache]: Analyzing trace with hash -694322230, now seen corresponding path program 1 times [2020-10-27 00:20:36,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:36,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479672037] [2020-10-27 00:20:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:36,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:36,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:37,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:41,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:41,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-27 00:20:41,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:20:41,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4829 [2020-10-27 00:20:41,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:41,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:20:41,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:20:41,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 187 [2020-10-27 00:20:41,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:41,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:41,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:41,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:41,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:41,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:41,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:20:41,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:20:41,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:41,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:41,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:41,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:41,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:41,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:41,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-27 00:20:41,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:41,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:20:41,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:41,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:20:41,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:41,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:41,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:41,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:42,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:42,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:20:42,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:20:42,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 00:20:42,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:42,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:42,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:42,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:20:42,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:20:42,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479672037] [2020-10-27 00:20:42,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:42,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:20:42,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674128064] [2020-10-27 00:20:42,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:20:42,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:42,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:20:42,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:20:42,305 INFO L87 Difference]: Start difference. First operand 3717 states and 4547 transitions. Second operand 10 states. [2020-10-27 00:20:42,483 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:21:18,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:18,740 INFO L93 Difference]: Finished difference Result 14017 states and 18273 transitions. [2020-10-27 00:21:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 00:21:18,742 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 182 [2020-10-27 00:21:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:18,835 INFO L225 Difference]: With dead ends: 14017 [2020-10-27 00:21:18,835 INFO L226 Difference]: Without dead ends: 9836 [2020-10-27 00:21:18,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-27 00:21:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2020-10-27 00:21:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9706. [2020-10-27 00:21:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9706 states. [2020-10-27 00:21:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 11830 transitions. [2020-10-27 00:21:19,169 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 11830 transitions. Word has length 182 [2020-10-27 00:21:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:19,171 INFO L481 AbstractCegarLoop]: Abstraction has 9706 states and 11830 transitions. [2020-10-27 00:21:19,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:21:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 11830 transitions. [2020-10-27 00:21:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-27 00:21:19,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:19,176 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:19,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:21:19,176 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:19,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:19,177 INFO L82 PathProgramCache]: Analyzing trace with hash -914877184, now seen corresponding path program 1 times [2020-10-27 00:21:19,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:19,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022699100] [2020-10-27 00:21:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:19,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:19,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:20,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:20,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-27 00:21:20,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:21:20,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1235 [2020-10-27 00:21:20,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:20,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:21:20,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:21:20,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 00:21:20,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:20,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:20,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:20,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:20,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:20,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:20,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 00:21:20,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:20,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:20,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:20,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:20,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:20,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:21:20,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:20,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 00:21:20,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:20,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:20,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:20,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:21:20,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:20,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:21:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:20,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:20,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:21,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:21,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:21:21,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:21:21,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-27 00:21:21,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:21,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:21,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:21,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:21:21,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:21:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 93 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:21:21,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022699100] [2020-10-27 00:21:21,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:21,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:21:21,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840655408] [2020-10-27 00:21:21,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:21:21,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:21,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:21:21,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:21:21,291 INFO L87 Difference]: Start difference. First operand 9706 states and 11830 transitions. Second operand 7 states. [2020-10-27 00:21:40,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:40,161 INFO L93 Difference]: Finished difference Result 19863 states and 24529 transitions. [2020-10-27 00:21:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:21:40,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 193 [2020-10-27 00:21:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:40,213 INFO L225 Difference]: With dead ends: 19863 [2020-10-27 00:21:40,213 INFO L226 Difference]: Without dead ends: 10163 [2020-10-27 00:21:40,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:21:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2020-10-27 00:21:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 9706. [2020-10-27 00:21:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9706 states. [2020-10-27 00:21:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 11802 transitions. [2020-10-27 00:21:40,515 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 11802 transitions. Word has length 193 [2020-10-27 00:21:40,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:40,516 INFO L481 AbstractCegarLoop]: Abstraction has 9706 states and 11802 transitions. [2020-10-27 00:21:40,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:21:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 11802 transitions. [2020-10-27 00:21:40,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-27 00:21:40,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:40,521 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 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] [2020-10-27 00:21:40,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:21:40,522 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:40,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:40,523 INFO L82 PathProgramCache]: Analyzing trace with hash -345363260, now seen corresponding path program 1 times [2020-10-27 00:21:40,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:40,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044157716] [2020-10-27 00:21:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:40,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:41,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:42,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:42,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:44,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:44,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-27 00:21:44,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:21:44,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3807 [2020-10-27 00:21:44,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:44,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:21:44,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:21:44,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 271 [2020-10-27 00:21:44,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:21:44,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:44,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:44,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:44,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:44,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:44,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:21:44,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:44,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:44,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:44,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:21:44,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:44,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:44,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:44,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:44,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:21:44,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:44,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-27 00:21:44,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:21:44,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:44,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:21:44,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:44,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:21:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:44,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:45,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:45,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:21:45,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:45,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 00:21:45,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:45,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:45,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:45,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:21:45,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:45,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:21:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:45,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:45,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:45,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:21:45,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:45,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 00:21:45,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:45,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:45,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:45,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:21:45,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:21:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 75 proven. 110 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-27 00:21:45,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044157716] [2020-10-27 00:21:45,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:45,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:21:45,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257198010] [2020-10-27 00:21:45,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:21:45,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:45,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:21:45,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:21:45,555 INFO L87 Difference]: Start difference. First operand 9706 states and 11802 transitions. Second operand 9 states. [2020-10-27 00:21:45,714 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:22:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:22:10,378 INFO L93 Difference]: Finished difference Result 34651 states and 43929 transitions. [2020-10-27 00:22:10,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 00:22:10,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 264 [2020-10-27 00:22:10,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:22:10,512 INFO L225 Difference]: With dead ends: 34651 [2020-10-27 00:22:10,512 INFO L226 Difference]: Without dead ends: 24051 [2020-10-27 00:22:10,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-27 00:22:10,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24051 states. [2020-10-27 00:22:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24051 to 18597. [2020-10-27 00:22:11,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18597 states. [2020-10-27 00:22:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18597 states to 18597 states and 22387 transitions. [2020-10-27 00:22:11,225 INFO L78 Accepts]: Start accepts. Automaton has 18597 states and 22387 transitions. Word has length 264 [2020-10-27 00:22:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:22:11,226 INFO L481 AbstractCegarLoop]: Abstraction has 18597 states and 22387 transitions. [2020-10-27 00:22:11,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:22:11,226 INFO L276 IsEmpty]: Start isEmpty. Operand 18597 states and 22387 transitions. [2020-10-27 00:22:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-27 00:22:11,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:22:11,233 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:22:11,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:22:11,234 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:22:11,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:22:11,235 INFO L82 PathProgramCache]: Analyzing trace with hash -264858203, now seen corresponding path program 1 times [2020-10-27 00:22:11,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:22:11,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858557881] [2020-10-27 00:22:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:22:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:11,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:11,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:11,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:13,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:16,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:16,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 303 [2020-10-27 00:22:16,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:22:16,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 00:22:16,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:16,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:16,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:22:16,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 00:22:16,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:16,551 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:22:16,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:22:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:16,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:16,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:16,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:22:16,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:16,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:22:16,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:22:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:22:16,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:16,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:22:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:16,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:16,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:16,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:22:16,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:16,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-27 00:22:16,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:16,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:22:16,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:16,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:22:16,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:16,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:22:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:16,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:17,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:17,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:22:17,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:17,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-27 00:22:17,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:17,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:17,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:17,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:22:17,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:22:17,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-27 00:22:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:17,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:17,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:17,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:22:17,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:17,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 00:22:17,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:17,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:22:17,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:22:17,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:22:17,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 124 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 00:22:17,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858557881] [2020-10-27 00:22:17,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:22:17,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:22:17,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937607531] [2020-10-27 00:22:17,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:22:17,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:22:17,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:22:17,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:22:17,670 INFO L87 Difference]: Start difference. First operand 18597 states and 22387 transitions. Second operand 7 states. [2020-10-27 00:22:18,540 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 00:22:24,224 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 00:22:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:22:37,862 INFO L93 Difference]: Finished difference Result 40537 states and 48983 transitions. [2020-10-27 00:22:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:22:37,866 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 287 [2020-10-27 00:22:37,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:22:37,950 INFO L225 Difference]: With dead ends: 40537 [2020-10-27 00:22:37,951 INFO L226 Difference]: Without dead ends: 21946 [2020-10-27 00:22:37,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:22:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21946 states. [2020-10-27 00:22:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21946 to 21818. [2020-10-27 00:22:38,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21818 states. [2020-10-27 00:22:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21818 states to 21818 states and 26291 transitions. [2020-10-27 00:22:38,594 INFO L78 Accepts]: Start accepts. Automaton has 21818 states and 26291 transitions. Word has length 287 [2020-10-27 00:22:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:22:38,595 INFO L481 AbstractCegarLoop]: Abstraction has 21818 states and 26291 transitions. [2020-10-27 00:22:38,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:22:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 21818 states and 26291 transitions. [2020-10-27 00:22:38,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-27 00:22:38,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:22:38,602 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:22:38,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:22:38,603 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:22:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:22:38,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1565960645, now seen corresponding path program 1 times [2020-10-27 00:22:38,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:22:38,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862120236] [2020-10-27 00:22:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:22:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:38,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:39,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:41,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:42,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:43,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:43,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-27 00:22:43,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:22:43,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-27 00:22:43,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:43,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:22:43,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:22:43,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-27 00:22:43,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:44,001 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:22:44,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:22:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:44,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:44,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:44,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:22:44,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:44,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 00:22:44,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:44,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:22:44,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:44,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:22:44,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:44,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:22:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:44,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:44,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:44,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:22:44,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:44,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-27 00:22:44,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:44,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:22:44,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:44,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:22:44,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:44,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:22:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:44,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:44,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:44,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 00:22:44,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:44,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-27 00:22:44,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:44,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:44,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:44,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-27 00:22:44,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:45,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-10-27 00:22:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:45,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:45,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:45,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:22:45,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:45,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-27 00:22:45,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:45,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:22:45,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:22:45,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:22:45,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 41 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:22:45,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862120236] [2020-10-27 00:22:45,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:22:45,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:22:45,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313505324] [2020-10-27 00:22:45,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:22:45,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:22:45,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:22:45,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:22:45,667 INFO L87 Difference]: Start difference. First operand 21818 states and 26291 transitions. Second operand 10 states. [2020-10-27 00:22:45,969 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-27 00:22:46,974 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 00:22:54,389 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 70