/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=DEEPEST --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/Problem06_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:37:21,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:37:21,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:37:21,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:37:21,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:37:21,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:37:21,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:37:21,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:37:21,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:37:21,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:37:21,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:37:21,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:37:21,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:37:21,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:37:21,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:37:21,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:37:21,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:37:21,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:37:21,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:37:21,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:37:21,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:37:21,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:37:21,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:37:21,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:37:21,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:37:21,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:37:21,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:37:21,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:37:21,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:37:21,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:37:21,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:37:21,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:37:21,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:37:21,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:37:21,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:37:21,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:37:21,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:37:21,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:37:21,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:37:21,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:37:21,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:37:21,570 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 16:37:21,629 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:37:21,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:37:21,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:37:21,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:37:21,631 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:37:21,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:37:21,632 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:37:21,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:37:21,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:37:21,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:37:21,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:37:21,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:37:21,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:37:21,633 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:37:21,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:37:21,634 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:37:21,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:37:21,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:37:21,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:37:21,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:37:21,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:37:21,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:37:21,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:37:21,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:37:21,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:37:21,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:37:21,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:37:21,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:37:21,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:37:21,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:37:22,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:37:22,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:37:22,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:37:22,105 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:37:22,106 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:37:22,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label53.c [2020-10-27 16:37:22,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e247623e/409e1aa3195548bb85e62a09d1ac1e1c/FLAG809950386 [2020-10-27 16:37:23,727 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:37:23,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label53.c [2020-10-27 16:37:23,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e247623e/409e1aa3195548bb85e62a09d1ac1e1c/FLAG809950386 [2020-10-27 16:37:24,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e247623e/409e1aa3195548bb85e62a09d1ac1e1c [2020-10-27 16:37:24,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:37:24,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:37:24,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:37:24,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:37:24,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:37:24,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:37:24" (1/1) ... [2020-10-27 16:37:24,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42584668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:37:24, skipping insertion in model container [2020-10-27 16:37:24,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:37:24" (1/1) ... [2020-10-27 16:37:24,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:37:24,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:37:26,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:37:26,656 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:37:27,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:37:27,847 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:37:27,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:37:27 WrapperNode [2020-10-27 16:37:27,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:37:27,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:37:27,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:37:27,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:37:27,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:37:27" (1/1) ... [2020-10-27 16:37:27,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:37:27" (1/1) ... [2020-10-27 16:37:27,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:37:27" (1/1) ... [2020-10-27 16:37:27,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:37:27" (1/1) ... [2020-10-27 16:37:28,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:37:27" (1/1) ... [2020-10-27 16:37:28,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:37:27" (1/1) ... [2020-10-27 16:37:28,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:37:27" (1/1) ... [2020-10-27 16:37:28,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:37:28,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:37:28,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:37:28,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:37:28,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:37:27" (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 16:37:28,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:37:28,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:37:28,472 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:37:28,472 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:37:28,472 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:37:28,472 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:37:28,473 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:37:28,473 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:37:28,473 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:37:28,473 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:37:28,474 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:37:28,474 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:37:28,474 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:37:28,475 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:37:28,475 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:37:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:37:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:37:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:37:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:37:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:37:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:37:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:37:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:37:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:37:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:37:28,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:37:28,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:37:36,230 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:37:36,231 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:37:36,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:37:36 BoogieIcfgContainer [2020-10-27 16:37:36,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:37:36,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:37:36,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:37:36,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:37:36,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:37:24" (1/3) ... [2020-10-27 16:37:36,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758ffefe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:37:36, skipping insertion in model container [2020-10-27 16:37:36,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:37:27" (2/3) ... [2020-10-27 16:37:36,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758ffefe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:37:36, skipping insertion in model container [2020-10-27 16:37:36,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:37:36" (3/3) ... [2020-10-27 16:37:36,250 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label53.c [2020-10-27 16:37:36,263 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:37:36,270 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:37:36,284 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:37:36,334 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:37:36,334 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:37:36,334 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:37:36,335 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:37:36,335 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:37:36,335 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:37:36,335 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:37:36,335 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:37:36,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-27 16:37:36,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1004 [2020-10-27 16:37:36,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:37:36,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:37:36,451 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:37:36,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:37:36,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1432387988, now seen corresponding path program 1 times [2020-10-27 16:37:36,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:37:36,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674052966] [2020-10-27 16:37:36,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:37:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:37:38,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:37:39,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:37:42,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:37:42,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1021 [2020-10-27 16:37:42,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:37:42,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 16:37:42,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:37:42,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 16:37:42,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:37:42,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-27 16:37:42,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 16:37:46,405 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 16:37:46,653 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 16:37:46,943 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-27 16:37:47,210 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-27 16:37:47,451 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 16:37:47,683 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 16:37:47,931 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-27 16:37:48,161 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-27 16:37:48,410 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-27 16:37:48,618 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-27 16:37:49,287 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:37:49,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:37:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:37:49,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:37:49,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:37:49,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:37:49,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:37:49,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 16:37:49,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:37:49,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:37:49,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:37:49,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:37:49,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:38:02,904 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 16:38:02,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674052966] [2020-10-27 16:38:02,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:38:02,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-27 16:38:02,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850155437] [2020-10-27 16:38:02,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 16:38:02,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:38:02,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 16:38:02,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-27 16:38:02,931 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-27 16:38:03,520 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 16:38:04,574 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 197 [2020-10-27 16:38:05,628 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 197 [2020-10-27 16:38:06,759 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 218 DAG size of output: 205 [2020-10-27 16:38:11,347 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 239 DAG size of output: 204 [2020-10-27 16:38:15,552 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 242 DAG size of output: 203 [2020-10-27 16:38:18,588 WARN L193 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 194 [2020-10-27 16:38:19,726 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 227 DAG size of output: 200 [2020-10-27 16:38:21,131 WARN L193 SmtUtils]: Spent 989.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 199 [2020-10-27 16:38:32,368 WARN L193 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 192 [2020-10-27 16:38:33,524 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 218 DAG size of output: 197 [2020-10-27 16:38:37,025 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 196 [2020-10-27 16:38:45,311 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 190 [2020-10-27 16:38:46,373 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 194 [2020-10-27 16:38:49,350 WARN L193 SmtUtils]: Spent 972.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 192 [2020-10-27 16:39:03,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:39:03,548 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-27 16:39:03,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 16:39:03,551 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1003 [2020-10-27 16:39:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:39:03,614 INFO L225 Difference]: With dead ends: 3401 [2020-10-27 16:39:03,614 INFO L226 Difference]: Without dead ends: 2020 [2020-10-27 16:39:03,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 16:39:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-27 16:39:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-27 16:39:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-27 16:39:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-27 16:39:03,860 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 1003 [2020-10-27 16:39:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:39:03,864 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-27 16:39:03,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 16:39:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-27 16:39:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1074 [2020-10-27 16:39:03,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:39:03,919 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:39:03,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:39:03,920 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:39:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:39:03,929 INFO L82 PathProgramCache]: Analyzing trace with hash -819312085, now seen corresponding path program 1 times [2020-10-27 16:39:03,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:39:03,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952049479] [2020-10-27 16:39:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:39:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:04,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:06,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:09,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:09,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1093 [2020-10-27 16:39:09,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:39:09,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5147 [2020-10-27 16:39:09,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:09,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 16:39:09,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:39:09,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 16:39:09,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:09,769 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:39:09,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:39:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:09,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:09,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:09,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:39:09,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:39:09,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 16:39:09,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:09,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:39:09,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:39:09,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:39:09,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:09,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:39:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:09,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:10,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:10,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 16:39:10,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:39:10,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-27 16:39:10,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:10,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:39:10,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:39:10,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 16:39:10,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:10,486 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-10-27 16:39:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:39:11,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952049479] [2020-10-27 16:39:11,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:39:11,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 16:39:11,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183114674] [2020-10-27 16:39:11,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:39:11,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:39:11,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:39:11,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:39:11,580 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states. [2020-10-27 16:39:11,889 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 16:39:13,301 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 16:39:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:39:37,672 INFO L93 Difference]: Finished difference Result 4501 states and 7535 transitions. [2020-10-27 16:39:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 16:39:37,674 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1073 [2020-10-27 16:39:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:39:37,692 INFO L225 Difference]: With dead ends: 4501 [2020-10-27 16:39:37,693 INFO L226 Difference]: Without dead ends: 3241 [2020-10-27 16:39:37,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 16:39:37,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3241 states. [2020-10-27 16:39:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3241 to 3151. [2020-10-27 16:39:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3151 states. [2020-10-27 16:39:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3151 states to 3151 states and 4657 transitions. [2020-10-27 16:39:37,803 INFO L78 Accepts]: Start accepts. Automaton has 3151 states and 4657 transitions. Word has length 1073 [2020-10-27 16:39:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:39:37,803 INFO L481 AbstractCegarLoop]: Abstraction has 3151 states and 4657 transitions. [2020-10-27 16:39:37,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 16:39:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3151 states and 4657 transitions. [2020-10-27 16:39:37,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1126 [2020-10-27 16:39:37,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:39:37,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:39:37,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:39:37,823 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:39:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:39:37,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1859226040, now seen corresponding path program 1 times [2020-10-27 16:39:37,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:39:37,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592451537] [2020-10-27 16:39:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:39:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:38,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:39,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:43,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:43,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1145 [2020-10-27 16:39:43,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:39:43,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5238 [2020-10-27 16:39:43,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 16:39:43,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:39:43,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1136 [2020-10-27 16:39:43,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:44,490 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:39:44,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:39:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:44,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:44,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:44,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:39:44,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:39:44,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 16:39:44,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:39:44,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:39:44,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:39:44,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:39:44,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:39:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:44,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:44,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:45,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:45,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 16:39:45,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:39:45,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-27 16:39:45,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:45,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:39:45,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:39:45,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 16:39:45,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 115 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 16:39:46,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592451537] [2020-10-27 16:39:46,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:39:46,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:39:46,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061864652] [2020-10-27 16:39:46,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:39:46,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:39:46,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:39:46,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:39:46,315 INFO L87 Difference]: Start difference. First operand 3151 states and 4657 transitions. Second operand 5 states. [2020-10-27 16:39:46,575 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:40:05,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:40:05,650 INFO L93 Difference]: Finished difference Result 7722 states and 12172 transitions. [2020-10-27 16:40:05,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:40:05,656 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1125 [2020-10-27 16:40:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:40:05,686 INFO L225 Difference]: With dead ends: 7722 [2020-10-27 16:40:05,686 INFO L226 Difference]: Without dead ends: 5331 [2020-10-27 16:40:05,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:40:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5331 states. [2020-10-27 16:40:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5331 to 5317. [2020-10-27 16:40:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5317 states. [2020-10-27 16:40:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 7713 transitions. [2020-10-27 16:40:05,847 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 7713 transitions. Word has length 1125 [2020-10-27 16:40:05,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:40:05,849 INFO L481 AbstractCegarLoop]: Abstraction has 5317 states and 7713 transitions. [2020-10-27 16:40:05,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:40:05,849 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 7713 transitions. [2020-10-27 16:40:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1138 [2020-10-27 16:40:05,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:40:05,873 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:40:05,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:40:05,873 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:40:05,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:40:05,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1512956143, now seen corresponding path program 1 times [2020-10-27 16:40:05,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:40:05,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605068394] [2020-10-27 16:40:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:40:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:06,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:06,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:09,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:11,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:11,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1159 [2020-10-27 16:40:11,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:40:11,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5327 [2020-10-27 16:40:11,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:11,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:40:11,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 146 [2020-10-27 16:40:11,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1009 [2020-10-27 16:40:11,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 16:40:12,286 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:40:12,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:40:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:12,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:12,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:12,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:40:12,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:12,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 16:40:12,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:12,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:40:12,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:40:12,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:40:12,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:12,431 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:40:12,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:40:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:12,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:12,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:12,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 16:40:12,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:12,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 16:40:12,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:12,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:40:12,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:40:12,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:40:12,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:12,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-27 16:40:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:12,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:12,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:12,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-27 16:40:12,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:12,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 16:40:12,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:12,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:40:12,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:40:12,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 16:40:12,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 16:40:14,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605068394] [2020-10-27 16:40:14,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:40:14,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 16:40:14,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311865265] [2020-10-27 16:40:14,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 16:40:14,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:40:14,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 16:40:14,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:40:14,070 INFO L87 Difference]: Start difference. First operand 5317 states and 7713 transitions. Second operand 6 states. [2020-10-27 16:40:14,367 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 16:40:15,382 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:40:45,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:40:45,761 INFO L93 Difference]: Finished difference Result 18324 states and 28260 transitions. [2020-10-27 16:40:45,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 16:40:45,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1137 [2020-10-27 16:40:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:40:45,845 INFO L225 Difference]: With dead ends: 18324 [2020-10-27 16:40:45,846 INFO L226 Difference]: Without dead ends: 13767 [2020-10-27 16:40:45,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 16:40:45,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13767 states. [2020-10-27 16:40:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13767 to 13626. [2020-10-27 16:40:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13626 states. [2020-10-27 16:40:46,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13626 states to 13626 states and 19733 transitions. [2020-10-27 16:40:46,292 INFO L78 Accepts]: Start accepts. Automaton has 13626 states and 19733 transitions. Word has length 1137 [2020-10-27 16:40:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:40:46,294 INFO L481 AbstractCegarLoop]: Abstraction has 13626 states and 19733 transitions. [2020-10-27 16:40:46,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 16:40:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 13626 states and 19733 transitions. [2020-10-27 16:40:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1142 [2020-10-27 16:40:46,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:40:46,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:40:46,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 16:40:46,346 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:40:46,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:40:46,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1386693815, now seen corresponding path program 1 times [2020-10-27 16:40:46,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:40:46,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136463583] [2020-10-27 16:40:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:40:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:46,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:46,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:51,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:51,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1163 [2020-10-27 16:40:51,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:40:51,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 16:40:51,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:51,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:40:51,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 132 [2020-10-27 16:40:51,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 16:40:51,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:51,924 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:40:51,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:40:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:51,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:51,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:51,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:40:51,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:51,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:40:51,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:51,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:40:51,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:40:51,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:40:51,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:52,054 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:40:52,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:40:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:52,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:52,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:52,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 16:40:52,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:52,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-27 16:40:52,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:52,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:40:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:40:52,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 16:40:52,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:52,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-27 16:40:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:52,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:52,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:52,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 16:40:52,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:52,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 16:40:52,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:52,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:40:52,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:40:52,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 16:40:52,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 16:40:52,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136463583] [2020-10-27 16:40:52,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:40:52,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:40:52,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286890096] [2020-10-27 16:40:52,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:40:52,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:40:52,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:40:52,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:40:52,999 INFO L87 Difference]: Start difference. First operand 13626 states and 19733 transitions. Second operand 7 states. [2020-10-27 16:40:53,271 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:40:54,408 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 159