/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/Problem04_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 15:52:01,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 15:52:01,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 15:52:01,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 15:52:01,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 15:52:01,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 15:52:01,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 15:52:01,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 15:52:01,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 15:52:01,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 15:52:01,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 15:52:01,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 15:52:01,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 15:52:01,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 15:52:01,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 15:52:01,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 15:52:01,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 15:52:01,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 15:52:01,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 15:52:01,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 15:52:01,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 15:52:01,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 15:52:01,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 15:52:01,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 15:52:01,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 15:52:01,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 15:52:01,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 15:52:01,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 15:52:01,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 15:52:01,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 15:52:01,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 15:52:01,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 15:52:01,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 15:52:01,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 15:52:01,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 15:52:01,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 15:52:01,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 15:52:01,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 15:52:01,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 15:52:01,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 15:52:01,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 15:52:01,481 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 15:52:01,534 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 15:52:01,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 15:52:01,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 15:52:01,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 15:52:01,539 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 15:52:01,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 15:52:01,540 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 15:52:01,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 15:52:01,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 15:52:01,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 15:52:01,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 15:52:01,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 15:52:01,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 15:52:01,542 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 15:52:01,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 15:52:01,543 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 15:52:01,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 15:52:01,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 15:52:01,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 15:52:01,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 15:52:01,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 15:52:01,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 15:52:01,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 15:52:01,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 15:52:01,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 15:52:01,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 15:52:01,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 15:52:01,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 15:52:01,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 15:52:01,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 15:52:01,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 15:52:02,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 15:52:02,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 15:52:02,031 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 15:52:02,031 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 15:52:02,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label05.c [2020-10-27 15:52:02,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65b74249d/a6b50d5f2b6d4515be3895c25d12f9b2/FLAG71504af33 [2020-10-27 15:52:03,214 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 15:52:03,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label05.c [2020-10-27 15:52:03,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65b74249d/a6b50d5f2b6d4515be3895c25d12f9b2/FLAG71504af33 [2020-10-27 15:52:03,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65b74249d/a6b50d5f2b6d4515be3895c25d12f9b2 [2020-10-27 15:52:03,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 15:52:03,694 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 15:52:03,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 15:52:03,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 15:52:03,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 15:52:03,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:52:03" (1/1) ... [2020-10-27 15:52:03,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d4e8fe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:03, skipping insertion in model container [2020-10-27 15:52:03,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:52:03" (1/1) ... [2020-10-27 15:52:03,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 15:52:03,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 15:52:05,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:52:05,410 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 15:52:06,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 15:52:06,126 INFO L208 MainTranslator]: Completed translation [2020-10-27 15:52:06,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:06 WrapperNode [2020-10-27 15:52:06,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 15:52:06,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 15:52:06,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 15:52:06,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 15:52:06,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:06" (1/1) ... [2020-10-27 15:52:06,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:06" (1/1) ... [2020-10-27 15:52:06,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:06" (1/1) ... [2020-10-27 15:52:06,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:06" (1/1) ... [2020-10-27 15:52:06,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:06" (1/1) ... [2020-10-27 15:52:06,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:06" (1/1) ... [2020-10-27 15:52:06,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:06" (1/1) ... [2020-10-27 15:52:06,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 15:52:06,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 15:52:06,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 15:52:06,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 15:52:06,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:06" (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 15:52:06,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 15:52:06,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 15:52:06,602 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 15:52:06,602 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 15:52:06,603 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 15:52:06,603 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 15:52:06,603 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 15:52:06,603 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 15:52:06,603 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 15:52:06,603 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 15:52:06,604 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 15:52:06,604 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 15:52:06,605 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 15:52:06,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 15:52:06,605 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 15:52:06,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 15:52:06,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 15:52:06,606 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 15:52:06,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 15:52:06,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 15:52:06,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 15:52:06,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 15:52:06,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 15:52:06,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 15:52:06,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 15:52:11,970 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 15:52:11,970 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 15:52:11,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:52:11 BoogieIcfgContainer [2020-10-27 15:52:11,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 15:52:11,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 15:52:11,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 15:52:11,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 15:52:11,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:52:03" (1/3) ... [2020-10-27 15:52:11,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f6666a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:52:11, skipping insertion in model container [2020-10-27 15:52:11,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:52:06" (2/3) ... [2020-10-27 15:52:11,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f6666a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:52:11, skipping insertion in model container [2020-10-27 15:52:11,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:52:11" (3/3) ... [2020-10-27 15:52:11,983 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label05.c [2020-10-27 15:52:11,995 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 15:52:12,001 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 15:52:12,016 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 15:52:12,050 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 15:52:12,051 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 15:52:12,051 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 15:52:12,051 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 15:52:12,051 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 15:52:12,051 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 15:52:12,051 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 15:52:12,051 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 15:52:12,089 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-27 15:52:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2020-10-27 15:52:12,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:52:12,154 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] [2020-10-27 15:52:12,155 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:52:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:52:12,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1587494972, now seen corresponding path program 1 times [2020-10-27 15:52:12,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:52:12,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649478576] [2020-10-27 15:52:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:52:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:52:13,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:52:17,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:52:18,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:52:18,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 812 [2020-10-27 15:52:18,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 15:52:18,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-27 15:52:18,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:52:18,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 15:52:18,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 15:52:18,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 742 [2020-10-27 15:52:18,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 15:52:19,708 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-27 15:52:19,855 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-27 15:52:19,979 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-27 15:52:20,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:52:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:52:20,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:52:20,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:52:20,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:52:20,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:52:20,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 15:52:20,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:52:20,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:52:20,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:52:20,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 15:52:20,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:52:25,785 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 15:52:25,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649478576] [2020-10-27 15:52:25,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 15:52:25,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-27 15:52:25,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587284492] [2020-10-27 15:52:25,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 15:52:25,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:52:25,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 15:52:25,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-27 15:52:25,814 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 18 states. [2020-10-27 15:52:26,090 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 15:52:26,321 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 15:52:26,556 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 15:52:26,824 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 15:52:27,314 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 15:52:27,714 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-27 15:52:30,539 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 15:52:31,073 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 123 [2020-10-27 15:52:33,699 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 15:52:34,091 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2020-10-27 15:52:35,720 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 113 [2020-10-27 15:52:40,513 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-27 15:52:40,722 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 15:52:46,808 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-27 15:52:47,009 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 15:52:50,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:52:50,319 INFO L93 Difference]: Finished difference Result 2553 states and 4911 transitions. [2020-10-27 15:52:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 15:52:50,321 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 796 [2020-10-27 15:52:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:52:50,367 INFO L225 Difference]: With dead ends: 2553 [2020-10-27 15:52:50,367 INFO L226 Difference]: Without dead ends: 1581 [2020-10-27 15:52:50,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 15:52:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2020-10-27 15:52:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1581. [2020-10-27 15:52:50,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1581 states. [2020-10-27 15:52:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2340 transitions. [2020-10-27 15:52:50,574 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2340 transitions. Word has length 796 [2020-10-27 15:52:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:52:50,577 INFO L481 AbstractCegarLoop]: Abstraction has 1581 states and 2340 transitions. [2020-10-27 15:52:50,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 15:52:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2340 transitions. [2020-10-27 15:52:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2020-10-27 15:52:50,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:52:50,620 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 15:52:50,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 15:52:50,625 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:52:50,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:52:50,627 INFO L82 PathProgramCache]: Analyzing trace with hash 59361525, now seen corresponding path program 1 times [2020-10-27 15:52:50,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:52:50,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643760190] [2020-10-27 15:52:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:52:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:52:51,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:52:51,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:52:53,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:52:55,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:52:55,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 833 [2020-10-27 15:52:55,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:52:55,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 15:52:55,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:52:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 15:52:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 15:52:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 705 [2020-10-27 15:52:55,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:52:57,942 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2020-10-27 15:52:58,102 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2020-10-27 15:52:58,280 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 37 [2020-10-27 15:52:58,483 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2020-10-27 15:52:58,680 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 31 [2020-10-27 15:52:59,226 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 15:52:59,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:52:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:52:59,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:52:59,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:52:59,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:52:59,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:52:59,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 15:52:59,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:52:59,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:52:59,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:52:59,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:52:59,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:52:59,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:52:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:52:59,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:52:59,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:52:59,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:52:59,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:52:59,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 15:52:59,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:52:59,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:52:59,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:52:59,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 15:52:59,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:53:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:53:04,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643760190] [2020-10-27 15:53:04,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:53:04,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 15:53:04,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633660093] [2020-10-27 15:53:04,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 15:53:04,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:53:04,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 15:53:04,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-27 15:53:04,055 INFO L87 Difference]: Start difference. First operand 1581 states and 2340 transitions. Second operand 19 states. [2020-10-27 15:53:04,546 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-27 15:53:04,755 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 15:53:05,267 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 15:53:09,293 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-27 15:53:11,086 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 15:53:13,321 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 113 [2020-10-27 15:53:14,036 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-27 15:53:14,269 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-27 15:53:15,809 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 15:53:22,440 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-27 15:53:22,648 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 15:53:31,046 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-27 15:53:31,268 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 15:53:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:53:34,513 INFO L93 Difference]: Finished difference Result 3125 states and 5330 transitions. [2020-10-27 15:53:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 15:53:34,517 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 815 [2020-10-27 15:53:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:53:34,531 INFO L225 Difference]: With dead ends: 3125 [2020-10-27 15:53:34,531 INFO L226 Difference]: Without dead ends: 2277 [2020-10-27 15:53:34,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2020-10-27 15:53:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2020-10-27 15:53:34,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2277. [2020-10-27 15:53:34,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2277 states. [2020-10-27 15:53:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3046 transitions. [2020-10-27 15:53:34,627 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 3046 transitions. Word has length 815 [2020-10-27 15:53:34,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:53:34,628 INFO L481 AbstractCegarLoop]: Abstraction has 2277 states and 3046 transitions. [2020-10-27 15:53:34,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 15:53:34,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 3046 transitions. [2020-10-27 15:53:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2020-10-27 15:53:34,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:53:34,641 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:53:34,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 15:53:34,641 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:53:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:53:34,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1338011550, now seen corresponding path program 1 times [2020-10-27 15:53:34,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:53:34,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791935144] [2020-10-27 15:53:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:53:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:53:35,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:35,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:36,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:39,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:53:39,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 840 [2020-10-27 15:53:39,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 15:53:39,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-27 15:53:39,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:53:39,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 15:53:39,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 15:53:39,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 517 [2020-10-27 15:53:39,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:53:41,854 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-27 15:53:41,969 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-10-27 15:53:42,111 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-27 15:53:42,288 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-27 15:53:42,462 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-27 15:53:42,633 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-27 15:53:43,175 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 15:53:43,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:53:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:53:43,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:43,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:53:43,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:53:43,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:53:43,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 15:53:43,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:53:43,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:53:43,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:53:43,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:53:43,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:53:43,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:53:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:53:43,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:53:43,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:53:43,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 15:53:43,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:53:43,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 15:53:43,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:53:43,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:53:43,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:53:43,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 15:53:43,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-27 15:53:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 15:53:47,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791935144] [2020-10-27 15:53:47,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:53:47,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 15:53:47,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872927872] [2020-10-27 15:53:47,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 15:53:47,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:53:47,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 15:53:47,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 15:53:47,566 INFO L87 Difference]: Start difference. First operand 2277 states and 3046 transitions. Second operand 17 states. [2020-10-27 15:53:48,287 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 15:53:48,550 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 15:53:55,354 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2020-10-27 15:53:56,720 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 122 [2020-10-27 15:53:57,205 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 136 [2020-10-27 15:53:57,762 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 133 [2020-10-27 15:53:58,595 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 133 [2020-10-27 15:54:00,602 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 130 [2020-10-27 15:54:06,249 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 125 [2020-10-27 15:54:06,945 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-10-27 15:54:07,320 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-27 15:54:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:54:14,963 INFO L93 Difference]: Finished difference Result 4331 states and 6369 transitions. [2020-10-27 15:54:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 15:54:14,965 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 822 [2020-10-27 15:54:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:54:14,980 INFO L225 Difference]: With dead ends: 4331 [2020-10-27 15:54:14,980 INFO L226 Difference]: Without dead ends: 2787 [2020-10-27 15:54:14,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-10-27 15:54:14,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2020-10-27 15:54:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2787. [2020-10-27 15:54:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2787 states. [2020-10-27 15:54:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 3565 transitions. [2020-10-27 15:54:15,057 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 3565 transitions. Word has length 822 [2020-10-27 15:54:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:54:15,058 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 3565 transitions. [2020-10-27 15:54:15,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 15:54:15,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 3565 transitions. [2020-10-27 15:54:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 833 [2020-10-27 15:54:15,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:54:15,071 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 15:54:15,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 15:54:15,072 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:54:15,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:54:15,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1385752648, now seen corresponding path program 1 times [2020-10-27 15:54:15,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:54:15,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283237790] [2020-10-27 15:54:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:54:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:15,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:16,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:20,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:20,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 852 [2020-10-27 15:54:20,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 15:54:20,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 15:54:20,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:20,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 15:54:20,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 15:54:20,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 800 [2020-10-27 15:54:20,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:20,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:54:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:20,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:20,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:20,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:54:20,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:20,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 15:54:20,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:20,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:54:20,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:20,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:54:20,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:21,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:54:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:21,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:21,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:21,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:54:21,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:21,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 15:54:21,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:54:21,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:21,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:54:21,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:21,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 15:54:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:21,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:21,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:21,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 15:54:21,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:21,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 15:54:21,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:21,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:54:21,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:21,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 15:54:21,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 15:54:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 15:54:21,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283237790] [2020-10-27 15:54:21,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:54:21,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 15:54:21,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114625648] [2020-10-27 15:54:21,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 15:54:21,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:54:21,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 15:54:21,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 15:54:21,850 INFO L87 Difference]: Start difference. First operand 2787 states and 3565 transitions. Second operand 5 states. [2020-10-27 15:54:22,196 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 15:54:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:54:34,636 INFO L93 Difference]: Finished difference Result 5686 states and 8007 transitions. [2020-10-27 15:54:34,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 15:54:34,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 832 [2020-10-27 15:54:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:54:34,657 INFO L225 Difference]: With dead ends: 5686 [2020-10-27 15:54:34,658 INFO L226 Difference]: Without dead ends: 3632 [2020-10-27 15:54:34,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 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 15:54:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2020-10-27 15:54:34,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 3632. [2020-10-27 15:54:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3632 states. [2020-10-27 15:54:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 4726 transitions. [2020-10-27 15:54:34,753 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 4726 transitions. Word has length 832 [2020-10-27 15:54:34,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:54:34,755 INFO L481 AbstractCegarLoop]: Abstraction has 3632 states and 4726 transitions. [2020-10-27 15:54:34,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 15:54:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 4726 transitions. [2020-10-27 15:54:34,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 883 [2020-10-27 15:54:34,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:54:34,771 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:54:34,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 15:54:34,771 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:54:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:54:34,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1474700746, now seen corresponding path program 1 times [2020-10-27 15:54:34,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:54:34,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754366887] [2020-10-27 15:54:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:54:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:34,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:35,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:39,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:39,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 904 [2020-10-27 15:54:39,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 15:54:39,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 15:54:39,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:39,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 15:54:39,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-27 15:54:39,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 555 [2020-10-27 15:54:39,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:41,724 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-27 15:54:41,870 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-27 15:54:42,097 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2020-10-27 15:54:42,327 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2020-10-27 15:54:42,477 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 15:54:42,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:54:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:42,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:42,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:42,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:54:42,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:42,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 15:54:42,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:42,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:54:42,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:42,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:54:42,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:42,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:54:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:42,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:42,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:42,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:54:42,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:42,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 15:54:42,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:42,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:54:42,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:42,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:54:42,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:42,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 15:54:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:42,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:42,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:42,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 15:54:42,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:42,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-27 15:54:42,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:42,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:54:42,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:42,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:54:42,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:42,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 15:54:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:54:42,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:54:42,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:54:42,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 15:54:42,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:54:42,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 15:54:42,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:54:42,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:54:42,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:54:42,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 15:54:42,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:54:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-27 15:54:47,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754366887] [2020-10-27 15:54:47,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:54:47,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 15:54:47,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513211416] [2020-10-27 15:54:47,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 15:54:47,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:54:47,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 15:54:47,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 15:54:47,584 INFO L87 Difference]: Start difference. First operand 3632 states and 4726 transitions. Second operand 17 states. [2020-10-27 15:54:48,925 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 15:54:49,188 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 15:54:50,754 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 15:54:51,827 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 15:54:57,732 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 15:54:57,981 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-27 15:55:01,301 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-27 15:55:06,161 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 114 [2020-10-27 15:55:06,646 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 119 [2020-10-27 15:55:08,349 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 118 [2020-10-27 15:55:09,761 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 116 [2020-10-27 15:55:15,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:55:15,246 INFO L93 Difference]: Finished difference Result 7079 states and 9810 transitions. [2020-10-27 15:55:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 15:55:15,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 882 [2020-10-27 15:55:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:55:15,268 INFO L225 Difference]: With dead ends: 7079 [2020-10-27 15:55:15,268 INFO L226 Difference]: Without dead ends: 4180 [2020-10-27 15:55:15,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-27 15:55:15,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2020-10-27 15:55:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 4180. [2020-10-27 15:55:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4180 states. [2020-10-27 15:55:15,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4180 states to 4180 states and 5283 transitions. [2020-10-27 15:55:15,376 INFO L78 Accepts]: Start accepts. Automaton has 4180 states and 5283 transitions. Word has length 882 [2020-10-27 15:55:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:55:15,378 INFO L481 AbstractCegarLoop]: Abstraction has 4180 states and 5283 transitions. [2020-10-27 15:55:15,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 15:55:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4180 states and 5283 transitions. [2020-10-27 15:55:15,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 886 [2020-10-27 15:55:15,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:55:15,398 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:55:15,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 15:55:15,399 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:55:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:55:15,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1568705613, now seen corresponding path program 1 times [2020-10-27 15:55:15,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:55:15,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670335840] [2020-10-27 15:55:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:55:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:15,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:15,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:20,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:20,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 907 [2020-10-27 15:55:20,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 15:55:20,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 15:55:20,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:20,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 15:55:20,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-27 15:55:20,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 568 [2020-10-27 15:55:20,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:21,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 15:55:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:21,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:21,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:21,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 15:55:21,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:21,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:55:21,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:21,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:55:21,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:21,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:55:21,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:22,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 15:55:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:22,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:22,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:22,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 15:55:22,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:22,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:55:22,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:22,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:55:22,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:22,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:55:22,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:22,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 15:55:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:22,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:22,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:22,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 15:55:22,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:22,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 15:55:22,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:22,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 15:55:22,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:22,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 15:55:22,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:22,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-27 15:55:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:22,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:22,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 15:55:22,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 15:55:22,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 15:55:22,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 15:55:22,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 15:55:22,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 15:55:22,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 15:55:22,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 15:55:22,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 15:55:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 83 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-27 15:55:26,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670335840] [2020-10-27 15:55:26,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 15:55:26,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 15:55:26,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091228220] [2020-10-27 15:55:26,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 15:55:26,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 15:55:26,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 15:55:26,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-27 15:55:26,713 INFO L87 Difference]: Start difference. First operand 4180 states and 5283 transitions. Second operand 17 states. [2020-10-27 15:55:27,500 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-27 15:55:27,742 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-27 15:55:28,848 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 15:55:29,643 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-27 15:55:33,641 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 15:55:34,317 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-27 15:55:34,571 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-27 15:55:37,684 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-27 15:55:38,244 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 15:55:40,462 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-27 15:55:40,658 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-27 15:55:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 15:55:45,110 INFO L93 Difference]: Finished difference Result 8198 states and 10965 transitions. [2020-10-27 15:55:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 15:55:45,112 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 885 [2020-10-27 15:55:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 15:55:45,131 INFO L225 Difference]: With dead ends: 8198 [2020-10-27 15:55:45,131 INFO L226 Difference]: Without dead ends: 4751 [2020-10-27 15:55:45,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2020-10-27 15:55:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2020-10-27 15:55:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 4749. [2020-10-27 15:55:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4749 states. [2020-10-27 15:55:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 5864 transitions. [2020-10-27 15:55:45,252 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 5864 transitions. Word has length 885 [2020-10-27 15:55:45,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 15:55:45,253 INFO L481 AbstractCegarLoop]: Abstraction has 4749 states and 5864 transitions. [2020-10-27 15:55:45,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 15:55:45,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 5864 transitions. [2020-10-27 15:55:45,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 891 [2020-10-27 15:55:45,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 15:55:45,271 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:55:45,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 15:55:45,271 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 15:55:45,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 15:55:45,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1465866662, now seen corresponding path program 1 times [2020-10-27 15:55:45,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 15:55:45,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594340987] [2020-10-27 15:55:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 15:55:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 15:55:45,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:45,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 15:55:45,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking...