/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:36:45,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:36:45,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:36:45,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:36:45,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:36:45,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:36:45,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:36:45,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:36:45,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:36:45,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:36:45,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:36:45,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:36:45,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:36:45,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:36:45,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:36:45,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:36:45,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:36:45,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:36:45,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:36:45,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:36:45,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:36:45,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:36:45,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:36:45,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:36:45,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:36:45,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:36:45,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:36:45,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:36:45,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:36:45,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:36:45,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:36:45,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:36:45,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:36:45,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:36:45,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:36:45,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:36:45,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:36:45,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:36:45,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:36:45,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:36:45,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:36:45,317 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 16:36:45,356 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:36:45,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:36:45,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:36:45,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:36:45,358 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:36:45,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:36:45,359 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:36:45,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:36:45,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:36:45,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:36:45,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:36:45,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:36:45,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:36:45,360 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:36:45,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:36:45,360 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:36:45,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:36:45,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:36:45,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:36:45,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:36:45,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:36:45,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:36:45,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:36:45,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:36:45,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:36:45,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:36:45,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:36:45,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:36:45,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:36:45,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:36:45,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:36:45,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:36:45,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:36:45,787 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:36:45,787 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:36:45,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label51.c [2020-10-27 16:36:45,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcd192722/6ff8df1a969d484ea6dba38d0b2a9fce/FLAG9a5493e57 [2020-10-27 16:36:46,994 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:36:46,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label51.c [2020-10-27 16:36:47,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcd192722/6ff8df1a969d484ea6dba38d0b2a9fce/FLAG9a5493e57 [2020-10-27 16:36:47,342 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcd192722/6ff8df1a969d484ea6dba38d0b2a9fce [2020-10-27 16:36:47,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:36:47,355 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:36:47,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:36:47,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:36:47,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:36:47,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:36:47" (1/1) ... [2020-10-27 16:36:47,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22af7c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:36:47, skipping insertion in model container [2020-10-27 16:36:47,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:36:47" (1/1) ... [2020-10-27 16:36:47,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:36:47,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:36:49,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:36:49,927 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:36:51,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:36:51,076 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:36:51,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:36:51 WrapperNode [2020-10-27 16:36:51,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:36:51,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:36:51,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:36:51,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:36:51,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:36:51" (1/1) ... [2020-10-27 16:36:51,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:36:51" (1/1) ... [2020-10-27 16:36:51,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:36:51" (1/1) ... [2020-10-27 16:36:51,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:36:51" (1/1) ... [2020-10-27 16:36:51,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:36:51" (1/1) ... [2020-10-27 16:36:51,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:36:51" (1/1) ... [2020-10-27 16:36:51,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:36:51" (1/1) ... [2020-10-27 16:36:51,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:36:51,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:36:51,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:36:51,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:36:51,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:36:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:36:51,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:36:51,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:36:51,886 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:36:51,887 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:36:51,887 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:36:51,888 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:36:51,888 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:36:51,888 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:36:51,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:36:51,888 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:36:51,889 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:36:51,889 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:36:51,890 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:36:51,890 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:36:51,890 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:36:51,891 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:36:51,891 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:36:51,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:36:51,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:36:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:36:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:36:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:36:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:36:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:36:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:36:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:36:51,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:37:00,301 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:37:00,305 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:37:00,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:37:00 BoogieIcfgContainer [2020-10-27 16:37:00,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:37:00,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:37:00,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:37:00,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:37:00,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:36:47" (1/3) ... [2020-10-27 16:37:00,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf98719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:37:00, skipping insertion in model container [2020-10-27 16:37:00,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:36:51" (2/3) ... [2020-10-27 16:37:00,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf98719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:37:00, skipping insertion in model container [2020-10-27 16:37:00,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:37:00" (3/3) ... [2020-10-27 16:37:00,319 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label51.c [2020-10-27 16:37:00,332 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:37:00,339 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:37:00,353 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:37:00,389 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:37:00,390 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:37:00,390 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:37:00,390 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:37:00,390 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:37:00,390 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:37:00,390 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:37:00,391 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:37:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-27 16:37:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 997 [2020-10-27 16:37:00,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:37:00,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:37:00,513 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:37:00,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:37:00,520 INFO L82 PathProgramCache]: Analyzing trace with hash -14942760, now seen corresponding path program 1 times [2020-10-27 16:37:00,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:37:00,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980350152] [2020-10-27 16:37:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:37:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:37:02,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:37:03,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:37:06,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:37:06,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1014 [2020-10-27 16:37:06,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:37:06,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5226 [2020-10-27 16:37:06,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:37:06,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 16:37:06,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:37:06,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-27 16:37:06,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 16:37:11,078 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-27 16:37:11,325 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-27 16:37:11,573 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-27 16:37:11,835 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-27 16:37:12,059 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-27 16:37:12,263 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-27 16:37:12,496 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-27 16:37:12,728 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-27 16:37:13,119 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-27 16:37:13,351 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-27 16:37:13,611 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2020-10-27 16:37:13,872 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2020-10-27 16:37:14,223 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 57 [2020-10-27 16:37:14,523 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:37:14,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:37:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:37:14,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:37:14,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:37:14,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:37:14,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:37:14,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 16:37:14,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:37:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:37:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:37:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:37:14,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:37:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:37:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980350152] [2020-10-27 16:37:27,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:37:27,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-27 16:37:27,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025644461] [2020-10-27 16:37:27,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 16:37:27,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:37:27,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 16:37:27,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-27 16:37:27,884 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-27 16:37:28,464 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 16:37:29,532 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 198 [2020-10-27 16:37:30,552 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 198 [2020-10-27 16:37:31,664 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 217 DAG size of output: 208 [2020-10-27 16:37:36,606 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 228 DAG size of output: 207 [2020-10-27 16:37:40,596 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 231 DAG size of output: 206 [2020-10-27 16:37:43,491 WARN L193 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 195 [2020-10-27 16:37:44,497 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 203 [2020-10-27 16:37:45,810 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 202 [2020-10-27 16:37:56,742 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 193 [2020-10-27 16:37:57,800 WARN L193 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 200 [2020-10-27 16:38:01,370 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 222 DAG size of output: 200 [2020-10-27 16:38:09,774 WARN L193 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 192 [2020-10-27 16:38:10,940 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 223 DAG size of output: 196 [2020-10-27 16:38:14,005 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 219 DAG size of output: 194 [2020-10-27 16:38:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:38:28,122 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-27 16:38:28,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 16:38:28,124 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 996 [2020-10-27 16:38:28,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:38:28,174 INFO L225 Difference]: With dead ends: 3401 [2020-10-27 16:38:28,176 INFO L226 Difference]: Without dead ends: 2020 [2020-10-27 16:38:28,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 16:38:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-27 16:38:28,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-27 16:38:28,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-27 16:38:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-27 16:38:28,403 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 996 [2020-10-27 16:38:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:38:28,407 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-27 16:38:28,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 16:38:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-27 16:38:28,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2020-10-27 16:38:28,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:38:28,474 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:38:28,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:38:28,476 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:38:28,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:38:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash 39493921, now seen corresponding path program 1 times [2020-10-27 16:38:28,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:38:28,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113367165] [2020-10-27 16:38:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:38:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:38:28,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:38:30,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:38:33,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:38:33,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1086 [2020-10-27 16:38:33,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:38:33,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5227 [2020-10-27 16:38:33,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:38:33,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 16:38:33,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:38:33,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 16:38:33,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:38:34,431 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:38:34,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:38:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:38:34,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:38:34,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:38:34,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:38:34,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:38:34,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 16:38:34,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:38:34,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:38:34,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:38:34,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:38:34,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:38:34,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:38:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:38:34,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:38:34,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:38:34,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 16:38:34,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:38:34,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-27 16:38:34,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:38:34,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:38:34,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:38:34,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 16:38:34,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:38:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:38:36,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113367165] [2020-10-27 16:38:36,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:38:36,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 16:38:36,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830089777] [2020-10-27 16:38:36,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:38:36,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:38:36,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:38:36,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:38:36,257 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states. [2020-10-27 16:38:36,551 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 16:38:38,045 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 16:39:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:39:01,815 INFO L93 Difference]: Finished difference Result 4488 states and 7527 transitions. [2020-10-27 16:39:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 16:39:01,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1066 [2020-10-27 16:39:01,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:39:01,835 INFO L225 Difference]: With dead ends: 4488 [2020-10-27 16:39:01,835 INFO L226 Difference]: Without dead ends: 3228 [2020-10-27 16:39:01,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 16:39:01,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2020-10-27 16:39:01,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 3148. [2020-10-27 16:39:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3148 states. [2020-10-27 16:39:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 4654 transitions. [2020-10-27 16:39:01,942 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 4654 transitions. Word has length 1066 [2020-10-27 16:39:01,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:39:01,943 INFO L481 AbstractCegarLoop]: Abstraction has 3148 states and 4654 transitions. [2020-10-27 16:39:01,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 16:39:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 4654 transitions. [2020-10-27 16:39:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1119 [2020-10-27 16:39:01,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:39:01,960 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:39:01,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:39:01,961 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:39:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:39:01,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1006556252, now seen corresponding path program 1 times [2020-10-27 16:39:01,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:39:01,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785117137] [2020-10-27 16:39:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:39:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:02,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:03,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:07,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:07,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1138 [2020-10-27 16:39:07,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:39:07,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5354 [2020-10-27 16:39:07,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:07,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:39:07,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 132 [2020-10-27 16:39:07,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1002 [2020-10-27 16:39:07,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:08,709 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:39:08,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:39:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:08,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:08,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:08,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:39:08,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:39:08,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 16:39:08,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:08,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:39:08,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:39:08,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:39:08,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:08,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:39:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:08,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:09,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:09,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 16:39:09,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:39:09,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-27 16:39:09,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:09,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:39:09,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:39:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 16:39:09,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 118 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:39:10,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785117137] [2020-10-27 16:39:10,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:39:10,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 16:39:10,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165153615] [2020-10-27 16:39:10,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 16:39:10,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:39:10,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 16:39:10,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:39:10,451 INFO L87 Difference]: Start difference. First operand 3148 states and 4654 transitions. Second operand 6 states. [2020-10-27 16:39:10,711 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:39:11,638 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:39:38,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:39:38,112 INFO L93 Difference]: Finished difference Result 9879 states and 15849 transitions. [2020-10-27 16:39:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 16:39:38,114 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1118 [2020-10-27 16:39:38,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:39:38,155 INFO L225 Difference]: With dead ends: 9879 [2020-10-27 16:39:38,156 INFO L226 Difference]: Without dead ends: 7491 [2020-10-27 16:39:38,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 16:39:38,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7491 states. [2020-10-27 16:39:38,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7491 to 7374. [2020-10-27 16:39:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7374 states. [2020-10-27 16:39:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7374 states to 7374 states and 10562 transitions. [2020-10-27 16:39:38,382 INFO L78 Accepts]: Start accepts. Automaton has 7374 states and 10562 transitions. Word has length 1118 [2020-10-27 16:39:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:39:38,384 INFO L481 AbstractCegarLoop]: Abstraction has 7374 states and 10562 transitions. [2020-10-27 16:39:38,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 16:39:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 7374 states and 10562 transitions. [2020-10-27 16:39:38,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1127 [2020-10-27 16:39:38,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:39:38,417 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 16:39:38,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:39:38,418 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:39:38,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:39:38,418 INFO L82 PathProgramCache]: Analyzing trace with hash -532761179, now seen corresponding path program 1 times [2020-10-27 16:39:38,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:39:38,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344469723] [2020-10-27 16:39:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:39:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:38,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:39,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:43,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:43,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:43,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1148 [2020-10-27 16:39:43,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:39:43,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5285 [2020-10-27 16:39:43,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:43,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:39:43,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 142 [2020-10-27 16:39:43,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1002 [2020-10-27 16:39:43,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:45,030 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:39:45,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:39:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:45,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:45,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:45,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:39:45,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:39:45,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 16:39:45,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:39:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:39:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:39:45,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:45,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:39:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:45,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:45,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:45,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 16:39:45,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:39:45,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-27 16:39:45,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:45,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:39:45,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:39:45,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:39:45,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:45,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-27 16:39:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:39:45,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:39:45,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:39:45,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 16:39:45,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:39:45,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 16:39:45,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:39:45,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:39:45,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:39:45,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 16:39:45,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:39:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 16:39:46,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344469723] [2020-10-27 16:39:46,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:39:46,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:39:46,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092821315] [2020-10-27 16:39:46,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:39:46,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:39:46,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:39:46,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:39:46,901 INFO L87 Difference]: Start difference. First operand 7374 states and 10562 transitions. Second operand 5 states. [2020-10-27 16:39:47,857 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:40:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:40:08,473 INFO L93 Difference]: Finished difference Result 16136 states and 24079 transitions. [2020-10-27 16:40:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:40:08,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1126 [2020-10-27 16:40:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:40:08,529 INFO L225 Difference]: With dead ends: 16136 [2020-10-27 16:40:08,530 INFO L226 Difference]: Without dead ends: 9522 [2020-10-27 16:40:08,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:40:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9522 states. [2020-10-27 16:40:08,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9522 to 9463. [2020-10-27 16:40:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9463 states. [2020-10-27 16:40:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9463 states to 9463 states and 13616 transitions. [2020-10-27 16:40:08,924 INFO L78 Accepts]: Start accepts. Automaton has 9463 states and 13616 transitions. Word has length 1126 [2020-10-27 16:40:08,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:40:08,925 INFO L481 AbstractCegarLoop]: Abstraction has 9463 states and 13616 transitions. [2020-10-27 16:40:08,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:40:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 9463 states and 13616 transitions. [2020-10-27 16:40:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1136 [2020-10-27 16:40:08,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:40:08,959 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 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] [2020-10-27 16:40:08,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 16:40:08,960 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:40:08,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:40:08,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1945890006, now seen corresponding path program 1 times [2020-10-27 16:40:08,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:40:08,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031382137] [2020-10-27 16:40:08,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:40:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:09,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:09,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:14,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:14,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:14,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1157 [2020-10-27 16:40:14,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:40:14,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5328 [2020-10-27 16:40:14,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:14,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:40:14,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-27 16:40:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1002 [2020-10-27 16:40:14,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:15,226 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:40:15,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:40:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:15,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:15,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:15,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:40:15,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:15,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:40:15,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:15,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:40:15,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:40:15,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:40:15,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:15,353 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:40:15,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:40:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:15,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:15,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:15,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 16:40:15,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:15,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-27 16:40:15,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:15,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:40:15,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:40:15,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:40:15,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:15,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-27 16:40:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:40:15,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:40:15,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:40:15,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 16:40:15,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:40:15,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 16:40:15,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:40:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:40:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:40:15,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 16:40:15,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:40:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 16:40:16,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031382137] [2020-10-27 16:40:16,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:40:16,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:40:16,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972581208] [2020-10-27 16:40:16,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:40:16,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:40:16,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:40:16,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:40:16,709 INFO L87 Difference]: Start difference. First operand 9463 states and 13616 transitions. Second operand 5 states. [2020-10-27 16:40:17,597 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159