/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:36:09,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:36:09,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:36:10,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:36:10,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:36:10,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:36:10,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:36:10,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:36:10,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:36:10,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:36:10,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:36:10,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:36:10,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:36:10,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:36:10,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:36:10,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:36:10,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:36:10,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:36:10,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:36:10,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:36:10,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:36:10,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:36:10,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:36:10,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:36:10,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:36:10,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:36:10,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:36:10,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:36:10,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:36:10,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:36:10,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:36:10,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:36:10,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:36:10,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:36:10,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:36:10,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:36:10,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:36:10,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:36:10,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:36:10,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:36:10,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:36:10,125 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 [2020-10-26 21:36:10,153 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:36:10,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:36:10,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:36:10,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:36:10,156 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:36:10,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:36:10,156 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:36:10,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:36:10,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:36:10,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:36:10,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:36:10,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:36:10,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:36:10,158 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:36:10,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:36:10,158 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:36:10,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:36:10,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:36:10,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:36:10,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:36:10,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:36:10,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:36:10,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:36:10,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:36:10,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:36:10,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:36:10,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:36:10,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:36:10,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:36:10,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:36:10,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:36:10,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:36:10,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:36:10,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:36:10,557 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:36:10,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label39.c [2020-10-26 21:36:10,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c05f2ed14/fea7da2c38eb4c43b01470ae119aaf4a/FLAG9b49c970e [2020-10-26 21:36:11,845 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:36:11,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label39.c [2020-10-26 21:36:11,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c05f2ed14/fea7da2c38eb4c43b01470ae119aaf4a/FLAG9b49c970e [2020-10-26 21:36:12,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c05f2ed14/fea7da2c38eb4c43b01470ae119aaf4a [2020-10-26 21:36:12,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:36:12,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:36:12,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:36:12,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:36:12,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:36:12,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:36:12" (1/1) ... [2020-10-26 21:36:12,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28051c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:12, skipping insertion in model container [2020-10-26 21:36:12,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:36:12" (1/1) ... [2020-10-26 21:36:12,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:36:12,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:36:14,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:36:14,458 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:36:15,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:36:15,645 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:36:15,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:15 WrapperNode [2020-10-26 21:36:15,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:36:15,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:36:15,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:36:15,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:36:15,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:15" (1/1) ... [2020-10-26 21:36:15,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:15" (1/1) ... [2020-10-26 21:36:15,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:15" (1/1) ... [2020-10-26 21:36:15,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:15" (1/1) ... [2020-10-26 21:36:16,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:15" (1/1) ... [2020-10-26 21:36:16,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:15" (1/1) ... [2020-10-26 21:36:16,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:15" (1/1) ... [2020-10-26 21:36:16,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:36:16,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:36:16,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:36:16,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:36:16,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:15" (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 [2020-10-26 21:36:16,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:36:16,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:36:16,489 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:36:16,489 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:36:16,490 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:36:16,490 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:36:16,490 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:36:16,490 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:36:16,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:36:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:36:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:36:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:36:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:36:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:36:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:36:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:36:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:36:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:36:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:36:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:36:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:36:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:36:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:36:16,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:36:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:36:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:36:16,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:36:28,478 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:36:28,478 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:36:28,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:36:28 BoogieIcfgContainer [2020-10-26 21:36:28,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:36:28,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:36:28,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:36:28,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:36:28,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:36:12" (1/3) ... [2020-10-26 21:36:28,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef8fe59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:36:28, skipping insertion in model container [2020-10-26 21:36:28,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:36:15" (2/3) ... [2020-10-26 21:36:28,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef8fe59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:36:28, skipping insertion in model container [2020-10-26 21:36:28,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:36:28" (3/3) ... [2020-10-26 21:36:28,499 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label39.c [2020-10-26 21:36:28,511 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:36:28,518 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:36:28,532 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:36:28,568 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:36:28,568 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:36:28,568 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:36:28,568 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:36:28,569 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:36:28,569 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:36:28,569 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:36:28,569 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:36:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:36:28,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2020-10-26 21:36:28,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:36:28,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:36:28,700 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:36:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:36:28,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1436205980, now seen corresponding path program 1 times [2020-10-26 21:36:28,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:36:28,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124775767] [2020-10-26 21:36:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:36:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:36:30,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:36:33,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:36:35,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:36:35,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 991 [2020-10-26 21:36:35,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:36:35,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-26 21:36:35,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:36:35,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:36:35,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:36:35,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-26 21:36:35,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 21:36:39,431 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-26 21:36:39,873 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-26 21:36:40,308 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-26 21:36:40,857 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-10-26 21:36:41,368 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-26 21:36:41,909 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2020-10-26 21:36:42,444 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2020-10-26 21:36:42,940 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-26 21:36:43,273 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-26 21:36:43,595 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-26 21:36:43,912 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-26 21:36:44,097 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-26 21:36:44,426 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-26 21:36:44,762 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-26 21:36:45,093 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2020-10-26 21:36:45,658 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:36:45,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:36:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:36:45,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:36:45,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:36:45,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:36:45,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:36:45,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 21:36:45,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:36:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:36:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:36:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:36:45,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:36:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:36:58,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124775767] [2020-10-26 21:36:58,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:36:58,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:36:58,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403370604] [2020-10-26 21:36:58,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:36:58,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:36:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:36:58,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:36:58,620 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-26 21:36:59,684 WARN L193 SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 21:37:01,712 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 206 DAG size of output: 199 [2020-10-26 21:37:03,661 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 206 DAG size of output: 199 [2020-10-26 21:37:05,763 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 221 DAG size of output: 210 [2020-10-26 21:37:13,047 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 234 DAG size of output: 208 [2020-10-26 21:37:19,910 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 236 DAG size of output: 206 [2020-10-26 21:37:25,029 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 212 DAG size of output: 197 [2020-10-26 21:37:27,236 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 222 DAG size of output: 205 [2020-10-26 21:37:30,136 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 226 DAG size of output: 203 [2020-10-26 21:37:47,107 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 201 DAG size of output: 191 [2020-10-26 21:37:48,996 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 207 DAG size of output: 196 [2020-10-26 21:37:55,182 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 213 DAG size of output: 196 [2020-10-26 21:38:08,440 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 203 DAG size of output: 190 [2020-10-26 21:38:10,490 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 208 DAG size of output: 194 [2020-10-26 21:38:15,445 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 210 DAG size of output: 192 [2020-10-26 21:38:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:38:38,062 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-26 21:38:38,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:38:38,065 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 973 [2020-10-26 21:38:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:38:38,121 INFO L225 Difference]: With dead ends: 3401 [2020-10-26 21:38:38,122 INFO L226 Difference]: Without dead ends: 2020 [2020-10-26 21:38:38,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:38:38,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-26 21:38:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-26 21:38:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-26 21:38:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-26 21:38:38,332 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 973 [2020-10-26 21:38:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:38:38,338 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-26 21:38:38,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:38:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-26 21:38:38,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1044 [2020-10-26 21:38:38,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:38:38,390 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:38:38,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:38:38,391 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:38:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:38:38,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1993203315, now seen corresponding path program 1 times [2020-10-26 21:38:38,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:38:38,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464936392] [2020-10-26 21:38:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:38:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:38,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:41,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:43,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:43,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1063 [2020-10-26 21:38:43,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:38:43,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-26 21:38:43,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:43,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:38:43,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:38:43,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:38:43,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:38:45,106 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:38:45,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:38:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:45,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:45,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:45,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:38:45,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:38:45,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 21:38:45,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:45,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:38:45,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:38:45,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:38:45,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:45,338 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:38:45,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:38:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:38:45,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:38:45,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:38:45,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:38:45,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:38:45,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-26 21:38:45,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:38:45,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:38:45,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:38:45,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:38:45,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:38:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:38:46,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464936392] [2020-10-26 21:38:46,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:38:46,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:38:46,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875257905] [2020-10-26 21:38:46,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:38:46,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:38:46,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:38:46,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:38:46,507 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states. [2020-10-26 21:38:47,056 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 21:38:49,339 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 21:39:22,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:39:22,814 INFO L93 Difference]: Finished difference Result 4488 states and 7527 transitions. [2020-10-26 21:39:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:39:22,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1043 [2020-10-26 21:39:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:39:22,839 INFO L225 Difference]: With dead ends: 4488 [2020-10-26 21:39:22,840 INFO L226 Difference]: Without dead ends: 3228 [2020-10-26 21:39:22,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:39:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2020-10-26 21:39:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 3148. [2020-10-26 21:39:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3148 states. [2020-10-26 21:39:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 4654 transitions. [2020-10-26 21:39:22,956 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 4654 transitions. Word has length 1043 [2020-10-26 21:39:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:39:22,957 INFO L481 AbstractCegarLoop]: Abstraction has 3148 states and 4654 transitions. [2020-10-26 21:39:22,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:39:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 4654 transitions. [2020-10-26 21:39:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2020-10-26 21:39:23,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:39:23,017 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:39:23,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:39:23,017 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:39:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:39:23,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1989530800, now seen corresponding path program 1 times [2020-10-26 21:39:23,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:39:23,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676844325] [2020-10-26 21:39:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:39:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:23,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:24,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:28,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:28,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1115 [2020-10-26 21:39:28,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:39:28,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-26 21:39:28,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:28,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 21:39:28,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:39:28,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 552 [2020-10-26 21:39:28,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:39:30,328 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-26 21:39:30,641 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-26 21:39:30,973 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-26 21:39:31,316 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-26 21:39:31,622 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-26 21:39:31,911 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-26 21:39:32,236 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-26 21:39:32,560 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-26 21:39:32,839 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-26 21:39:33,115 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-26 21:39:33,379 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-26 21:39:33,876 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:39:33,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:39:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:33,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:33,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:33,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:39:33,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:39:33,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 21:39:33,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:33,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:39:33,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:39:33,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:39:33,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:39:34,153 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:39:34,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:39:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:34,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:34,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:34,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:39:34,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:39:34,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-26 21:39:34,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:34,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 21:39:34,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:39:34,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:39:34,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:39:35,146 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 21:39:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:39:44,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676844325] [2020-10-26 21:39:44,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:39:44,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 21:39:44,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287682361] [2020-10-26 21:39:44,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:39:44,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:39:44,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:39:44,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:39:44,444 INFO L87 Difference]: Start difference. First operand 3148 states and 4654 transitions. Second operand 18 states. [2020-10-26 21:39:45,134 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 21:39:48,734 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-10-26 21:39:49,394 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2020-10-26 21:39:50,167 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2020-10-26 21:39:52,439 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 215 DAG size of output: 200 [2020-10-26 21:39:54,779 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 226 DAG size of output: 208 [2020-10-26 21:39:57,999 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 224 DAG size of output: 207