/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/Problem13_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 17:55:08,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 17:55:08,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 17:55:08,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 17:55:08,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 17:55:08,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 17:55:08,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 17:55:08,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 17:55:08,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 17:55:08,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 17:55:08,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 17:55:08,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 17:55:08,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 17:55:08,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 17:55:08,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 17:55:08,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 17:55:08,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 17:55:08,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 17:55:08,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 17:55:08,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 17:55:08,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 17:55:08,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 17:55:08,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 17:55:08,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 17:55:08,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 17:55:08,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 17:55:08,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 17:55:08,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 17:55:08,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 17:55:08,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 17:55:08,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 17:55:08,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 17:55:08,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 17:55:08,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 17:55:08,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 17:55:08,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 17:55:08,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 17:55:08,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 17:55:08,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 17:55:08,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 17:55:08,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 17:55:08,509 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 17:55:08,564 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 17:55:08,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 17:55:08,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 17:55:08,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 17:55:08,568 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 17:55:08,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 17:55:08,569 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 17:55:08,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 17:55:08,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 17:55:08,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 17:55:08,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 17:55:08,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 17:55:08,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 17:55:08,575 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 17:55:08,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 17:55:08,575 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 17:55:08,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 17:55:08,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 17:55:08,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 17:55:08,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 17:55:08,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 17:55:08,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 17:55:08,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 17:55:08,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 17:55:08,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 17:55:08,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 17:55:08,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 17:55:08,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 17:55:08,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 17:55:08,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 17:55:09,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 17:55:09,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 17:55:09,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 17:55:09,067 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 17:55:09,067 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 17:55:09,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label11.c [2020-10-27 17:55:09,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dab7235cb/79b5ca93c2c445e5af09d9bb87aa66de/FLAG6ad176412 [2020-10-27 17:55:10,379 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 17:55:10,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label11.c [2020-10-27 17:55:10,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dab7235cb/79b5ca93c2c445e5af09d9bb87aa66de/FLAG6ad176412 [2020-10-27 17:55:10,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dab7235cb/79b5ca93c2c445e5af09d9bb87aa66de [2020-10-27 17:55:10,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 17:55:10,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 17:55:10,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 17:55:10,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 17:55:10,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 17:55:10,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:55:10" (1/1) ... [2020-10-27 17:55:10,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64fa393c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:10, skipping insertion in model container [2020-10-27 17:55:10,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:55:10" (1/1) ... [2020-10-27 17:55:10,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 17:55:10,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 17:55:12,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:55:12,571 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 17:55:13,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:55:13,287 INFO L208 MainTranslator]: Completed translation [2020-10-27 17:55:13,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:13 WrapperNode [2020-10-27 17:55:13,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 17:55:13,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 17:55:13,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 17:55:13,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 17:55:13,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:13" (1/1) ... [2020-10-27 17:55:13,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:13" (1/1) ... [2020-10-27 17:55:13,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:13" (1/1) ... [2020-10-27 17:55:13,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:13" (1/1) ... [2020-10-27 17:55:13,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:13" (1/1) ... [2020-10-27 17:55:13,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:13" (1/1) ... [2020-10-27 17:55:13,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:13" (1/1) ... [2020-10-27 17:55:13,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 17:55:13,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 17:55:13,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 17:55:13,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 17:55:13,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:13" (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 17:55:13,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 17:55:13,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 17:55:13,908 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 17:55:13,909 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 17:55:13,909 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 17:55:13,909 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 17:55:13,909 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 17:55:13,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 17:55:13,909 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 17:55:13,910 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 17:55:13,910 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 17:55:13,910 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 17:55:13,910 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 17:55:13,910 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 17:55:13,910 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 17:55:13,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 17:55:13,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 17:55:13,911 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 17:55:13,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 17:55:13,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 17:55:13,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 17:55:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 17:55:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 17:55:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 17:55:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 17:55:24,434 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 17:55:24,434 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 17:55:24,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:55:24 BoogieIcfgContainer [2020-10-27 17:55:24,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 17:55:24,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 17:55:24,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 17:55:24,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 17:55:24,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:55:10" (1/3) ... [2020-10-27 17:55:24,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@941d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:55:24, skipping insertion in model container [2020-10-27 17:55:24,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:55:13" (2/3) ... [2020-10-27 17:55:24,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@941d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:55:24, skipping insertion in model container [2020-10-27 17:55:24,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:55:24" (3/3) ... [2020-10-27 17:55:24,450 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label11.c [2020-10-27 17:55:24,464 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 17:55:24,471 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 17:55:24,486 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 17:55:24,525 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 17:55:24,525 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 17:55:24,525 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 17:55:24,526 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 17:55:24,526 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 17:55:24,526 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 17:55:24,526 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 17:55:24,526 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 17:55:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 17:55:24,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 17:55:24,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:55:24,579 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] [2020-10-27 17:55:24,580 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:55:24,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:55:24,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1132836646, now seen corresponding path program 1 times [2020-10-27 17:55:24,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:55:24,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764449784] [2020-10-27 17:55:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:55:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:24,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:25,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:25,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 17:55:25,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:25,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-27 17:55:25,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:25,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 17:55:25,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 17:55:25,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 17:55:25,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 17:55:25,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:55:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:25,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:25,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:25,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:55:25,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:25,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 17:55:25,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:25,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:55:25,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:25,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:55:25,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:25,611 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 17:55:25,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764449784] [2020-10-27 17:55:25,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 17:55:25,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 17:55:25,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513053655] [2020-10-27 17:55:25,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 17:55:25,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:55:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 17:55:25,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 17:55:25,644 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-27 17:55:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:55:44,162 INFO L93 Difference]: Finished difference Result 3235 states and 5915 transitions. [2020-10-27 17:55:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:55:44,165 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 17:55:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:55:44,214 INFO L225 Difference]: With dead ends: 3235 [2020-10-27 17:55:44,214 INFO L226 Difference]: Without dead ends: 2027 [2020-10-27 17:55:44,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:55:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2020-10-27 17:55:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2010. [2020-10-27 17:55:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-27 17:55:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3292 transitions. [2020-10-27 17:55:44,475 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3292 transitions. Word has length 33 [2020-10-27 17:55:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:55:44,478 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3292 transitions. [2020-10-27 17:55:44,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 17:55:44,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3292 transitions. [2020-10-27 17:55:44,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 17:55:44,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:55:44,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:44,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 17:55:44,490 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:55:44,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:55:44,492 INFO L82 PathProgramCache]: Analyzing trace with hash 337880257, now seen corresponding path program 1 times [2020-10-27 17:55:44,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:55:44,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414567530] [2020-10-27 17:55:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:55:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:44,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:45,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:46,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:46,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 17:55:46,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:55:46,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1613 [2020-10-27 17:55:46,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:46,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:55:46,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 17:55:46,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 17:55:46,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:55:46,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:55:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:46,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:46,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:46,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:55:46,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:46,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 17:55:46,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:46,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:55:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:46,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:55:46,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:55:46,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:55:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:46,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:46,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:46,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 17:55:46,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:46,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 17:55:46,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:55:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:46,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 17:55:46,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:55:46,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414567530] [2020-10-27 17:55:46,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:55:46,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:55:46,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704041238] [2020-10-27 17:55:46,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:55:46,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:55:46,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:55:46,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:55:46,648 INFO L87 Difference]: Start difference. First operand 2010 states and 3292 transitions. Second operand 5 states. [2020-10-27 17:56:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:56:09,147 INFO L93 Difference]: Finished difference Result 5711 states and 9481 transitions. [2020-10-27 17:56:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:56:09,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-27 17:56:09,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:56:09,182 INFO L225 Difference]: With dead ends: 5711 [2020-10-27 17:56:09,182 INFO L226 Difference]: Without dead ends: 3707 [2020-10-27 17:56:09,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:56:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2020-10-27 17:56:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 3673. [2020-10-27 17:56:09,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3673 states. [2020-10-27 17:56:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 5313 transitions. [2020-10-27 17:56:09,315 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 5313 transitions. Word has length 108 [2020-10-27 17:56:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:56:09,316 INFO L481 AbstractCegarLoop]: Abstraction has 3673 states and 5313 transitions. [2020-10-27 17:56:09,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:56:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 5313 transitions. [2020-10-27 17:56:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 17:56:09,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:56:09,320 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:56:09,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 17:56:09,321 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:56:09,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:56:09,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1418710732, now seen corresponding path program 1 times [2020-10-27 17:56:09,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:56:09,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679361328] [2020-10-27 17:56:09,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:56:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:09,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:09,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:09,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:09,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:11,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:11,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 17:56:11,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:56:11,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1936 [2020-10-27 17:56:11,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:11,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:56:11,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 17:56:11,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 17:56:11,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:11,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:56:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:11,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:11,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:11,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:56:11,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:56:11,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:56:11,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:11,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:56:11,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:56:11,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:56:11,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:11,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:56:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:11,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:11,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:11,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:11,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 17:56:11,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:56:11,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-27 17:56:11,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:11,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:56:11,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 17:56:11,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:56:11,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:56:11,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679361328] [2020-10-27 17:56:11,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:56:11,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:56:11,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630702895] [2020-10-27 17:56:11,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:56:11,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:56:11,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:56:11,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:56:11,712 INFO L87 Difference]: Start difference. First operand 3673 states and 5313 transitions. Second operand 6 states. [2020-10-27 17:56:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:56:58,475 INFO L93 Difference]: Finished difference Result 14023 states and 21656 transitions. [2020-10-27 17:56:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 17:56:58,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-10-27 17:56:58,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:56:58,556 INFO L225 Difference]: With dead ends: 14023 [2020-10-27 17:56:58,557 INFO L226 Difference]: Without dead ends: 10356 [2020-10-27 17:56:58,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 17:56:58,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10356 states. [2020-10-27 17:56:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10356 to 10271. [2020-10-27 17:56:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10271 states. [2020-10-27 17:56:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10271 states to 10271 states and 13858 transitions. [2020-10-27 17:56:58,972 INFO L78 Accepts]: Start accepts. Automaton has 10271 states and 13858 transitions. Word has length 115 [2020-10-27 17:56:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:56:58,976 INFO L481 AbstractCegarLoop]: Abstraction has 10271 states and 13858 transitions. [2020-10-27 17:56:58,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 17:56:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 10271 states and 13858 transitions. [2020-10-27 17:56:58,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-27 17:56:58,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:56:58,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:56:58,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 17:56:58,997 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:56:59,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:56:59,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1678300181, now seen corresponding path program 1 times [2020-10-27 17:56:59,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:56:59,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517535727] [2020-10-27 17:56:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:56:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:59,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:59,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:00,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:00,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-27 17:57:00,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:57:00,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-10-27 17:57:00,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:00,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:57:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 17:57:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 17:57:00,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 17:57:00,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:57:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:00,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:00,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:00,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:57:00,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:00,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 17:57:00,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:00,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:57:00,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:57:00,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:57:00,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:57:00,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:57:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:00,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:00,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:00,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 17:57:00,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:00,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-27 17:57:00,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:00,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:57:00,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:57:00,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 17:57:00,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:57:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:57:00,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517535727] [2020-10-27 17:57:00,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:57:00,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:57:00,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927583802] [2020-10-27 17:57:00,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:57:00,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:57:00,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:57:00,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:57:00,926 INFO L87 Difference]: Start difference. First operand 10271 states and 13858 transitions. Second operand 5 states. [2020-10-27 17:57:01,067 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 17:57:26,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:57:26,612 INFO L93 Difference]: Finished difference Result 23829 states and 33518 transitions. [2020-10-27 17:57:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:57:26,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-10-27 17:57:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:57:26,719 INFO L225 Difference]: With dead ends: 23829 [2020-10-27 17:57:26,720 INFO L226 Difference]: Without dead ends: 13564 [2020-10-27 17:57:26,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:57:26,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13564 states. [2020-10-27 17:57:27,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13564 to 13536. [2020-10-27 17:57:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13536 states. [2020-10-27 17:57:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13536 states to 13536 states and 17954 transitions. [2020-10-27 17:57:27,358 INFO L78 Accepts]: Start accepts. Automaton has 13536 states and 17954 transitions. Word has length 134 [2020-10-27 17:57:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:57:27,359 INFO L481 AbstractCegarLoop]: Abstraction has 13536 states and 17954 transitions. [2020-10-27 17:57:27,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:57:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 13536 states and 17954 transitions. [2020-10-27 17:57:27,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-27 17:57:27,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:57:27,363 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:57:27,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 17:57:27,364 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:57:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:57:27,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1473301319, now seen corresponding path program 1 times [2020-10-27 17:57:27,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:57:27,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899230274] [2020-10-27 17:57:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:57:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:27,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:27,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:27,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:28,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:29,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:29,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 17:57:29,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:57:29,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2050 [2020-10-27 17:57:29,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:29,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:57:29,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-27 17:57:29,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 17:57:29,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:57:29,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:57:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:29,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:29,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:29,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:57:29,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:29,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:57:29,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:29,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:57:29,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:57:29,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:57:29,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:57:29,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:57:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:57:29,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:57:29,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:57:29,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 17:57:29,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:57:29,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 17:57:29,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:57:29,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:57:29,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:57:29,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 17:57:29,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:57:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:57:29,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899230274] [2020-10-27 17:57:29,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:57:29,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:57:29,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599857100] [2020-10-27 17:57:29,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:57:29,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:57:29,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:57:29,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:57:29,986 INFO L87 Difference]: Start difference. First operand 13536 states and 17954 transitions. Second operand 5 states. [2020-10-27 17:57:30,162 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 17:58:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:58:03,413 INFO L93 Difference]: Finished difference Result 37763 states and 51305 transitions. [2020-10-27 17:58:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:58:03,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-10-27 17:58:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:58:03,528 INFO L225 Difference]: With dead ends: 37763 [2020-10-27 17:58:03,529 INFO L226 Difference]: Without dead ends: 24233 [2020-10-27 17:58:03,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:58:03,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24233 states. [2020-10-27 17:58:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24233 to 24140. [2020-10-27 17:58:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24140 states. [2020-10-27 17:58:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24140 states to 24140 states and 32836 transitions. [2020-10-27 17:58:04,328 INFO L78 Accepts]: Start accepts. Automaton has 24140 states and 32836 transitions. Word has length 151 [2020-10-27 17:58:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:58:04,329 INFO L481 AbstractCegarLoop]: Abstraction has 24140 states and 32836 transitions. [2020-10-27 17:58:04,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:58:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 24140 states and 32836 transitions. [2020-10-27 17:58:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-27 17:58:04,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:58:04,340 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 17:58:04,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 17:58:04,340 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:58:04,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:58:04,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1500320153, now seen corresponding path program 1 times [2020-10-27 17:58:04,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:58:04,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413030356] [2020-10-27 17:58:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:58:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:04,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:04,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:04,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:06,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:06,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:06,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:09,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:09,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-27 17:58:09,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 17:58:09,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 17:58:09,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:09,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:58:09,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 228 [2020-10-27 17:58:09,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 17:58:09,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:09,659 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 17:58:09,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:58:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:09,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:09,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:09,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:58:09,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:58:09,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:58:09,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:09,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:58:09,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:58:09,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:58:09,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:09,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:58:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:09,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:09,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:09,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 17:58:09,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:58:09,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 17:58:09,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:09,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:58:09,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:58:09,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:58:09,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:09,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-10-27 17:58:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:09,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:09,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:09,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 17:58:09,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:58:09,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 17:58:09,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:09,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:58:09,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:58:09,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 17:58:09,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-10-27 17:58:10,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413030356] [2020-10-27 17:58:10,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:58:10,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:58:10,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306239452] [2020-10-27 17:58:10,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:58:10,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:58:10,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:58:10,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:58:10,122 INFO L87 Difference]: Start difference. First operand 24140 states and 32836 transitions. Second operand 5 states. [2020-10-27 17:58:10,306 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-27 17:58:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:58:38,929 INFO L93 Difference]: Finished difference Result 59640 states and 83807 transitions. [2020-10-27 17:58:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:58:38,932 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 249 [2020-10-27 17:58:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:58:39,115 INFO L225 Difference]: With dead ends: 59640 [2020-10-27 17:58:39,116 INFO L226 Difference]: Without dead ends: 35506 [2020-10-27 17:58:39,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:58:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35506 states. [2020-10-27 17:58:40,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35506 to 35493. [2020-10-27 17:58:40,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35493 states. [2020-10-27 17:58:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35493 states to 35493 states and 48049 transitions. [2020-10-27 17:58:40,253 INFO L78 Accepts]: Start accepts. Automaton has 35493 states and 48049 transitions. Word has length 249 [2020-10-27 17:58:40,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:58:40,255 INFO L481 AbstractCegarLoop]: Abstraction has 35493 states and 48049 transitions. [2020-10-27 17:58:40,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:58:40,255 INFO L276 IsEmpty]: Start isEmpty. Operand 35493 states and 48049 transitions. [2020-10-27 17:58:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-27 17:58:40,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:58:40,269 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:58:40,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 17:58:40,270 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:58:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:58:40,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1327881993, now seen corresponding path program 1 times [2020-10-27 17:58:40,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:58:40,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265836230] [2020-10-27 17:58:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:58:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:40,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:40,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:40,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:41,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:42,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:42,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:44,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:45,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:45,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-27 17:58:45,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 17:58:45,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 17:58:45,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:45,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:58:45,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 236 [2020-10-27 17:58:45,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 17:58:45,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:45,571 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 17:58:45,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:58:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:45,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:45,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:45,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:58:45,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:58:45,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:58:45,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:45,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:58:45,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:58:45,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:58:45,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:45,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:58:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:45,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:45,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:45,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 17:58:45,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:58:45,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 17:58:45,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:58:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:58:45,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:58:45,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:45,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-10-27 17:58:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:58:45,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:58:45,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:58:45,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 17:58:45,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:58:45,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 17:58:45,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:58:45,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:58:45,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:58:45,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 17:58:45,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:58:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-10-27 17:58:46,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265836230] [2020-10-27 17:58:46,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:58:46,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:58:46,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785394493] [2020-10-27 17:58:46,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:58:46,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:58:46,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:58:46,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:58:46,079 INFO L87 Difference]: Start difference. First operand 35493 states and 48049 transitions. Second operand 6 states.