/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/Problem19_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:45:07,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:45:07,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:45:07,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:45:07,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:45:07,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:45:07,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:45:07,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:45:07,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:45:07,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:45:07,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:45:07,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:45:07,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:45:07,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:45:07,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:45:07,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:45:07,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:45:07,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:45:07,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:45:07,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:45:07,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:45:07,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:45:07,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:45:07,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:45:07,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:45:07,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:45:07,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:45:07,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:45:07,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:45:07,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:45:07,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:45:07,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:45:07,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:45:07,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:45:07,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:45:07,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:45:07,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:45:07,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:45:07,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:45:07,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:45:07,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:45:07,996 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 00:45:08,043 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:45:08,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:45:08,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:45:08,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:45:08,048 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:45:08,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:45:08,049 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:45:08,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:45:08,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:45:08,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:45:08,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:45:08,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:45:08,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:45:08,051 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:45:08,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:45:08,051 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:45:08,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:45:08,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:45:08,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:45:08,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:45:08,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:45:08,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:45:08,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:45:08,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:45:08,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:45:08,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:45:08,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:45:08,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:45:08,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:45:08,054 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:45:08,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:45:08,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:45:08,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:45:08,515 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:45:08,516 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:45:08,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label28.c [2020-10-27 00:45:08,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8d11fe14/3b3d787b57004b1c9044594de67da222/FLAGda262b3dd [2020-10-27 00:45:09,711 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:45:09,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label28.c [2020-10-27 00:45:09,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8d11fe14/3b3d787b57004b1c9044594de67da222/FLAGda262b3dd [2020-10-27 00:45:10,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8d11fe14/3b3d787b57004b1c9044594de67da222 [2020-10-27 00:45:10,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:45:10,101 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:45:10,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:45:10,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:45:10,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:45:10,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:45:10" (1/1) ... [2020-10-27 00:45:10,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40cd7c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:10, skipping insertion in model container [2020-10-27 00:45:10,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:45:10" (1/1) ... [2020-10-27 00:45:10,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:45:10,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:45:12,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:45:12,346 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:45:13,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:45:13,507 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:45:13,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:13 WrapperNode [2020-10-27 00:45:13,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:45:13,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:45:13,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:45:13,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:45:13,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:13" (1/1) ... [2020-10-27 00:45:13,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:13" (1/1) ... [2020-10-27 00:45:13,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:13" (1/1) ... [2020-10-27 00:45:13,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:13" (1/1) ... [2020-10-27 00:45:14,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:13" (1/1) ... [2020-10-27 00:45:14,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:13" (1/1) ... [2020-10-27 00:45:14,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:13" (1/1) ... [2020-10-27 00:45:14,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:45:14,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:45:14,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:45:14,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:45:14,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:45:14,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:45:14,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:45:14,441 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:45:14,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:45:14,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:45:14,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:45:14,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:45:14,443 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:45:14,443 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:45:14,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:45:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:45:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:45:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:45:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:45:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:45:14,445 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:45:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:45:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:45:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:45:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:45:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:45:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:45:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:45:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:45:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:45:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:45:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:45:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:45:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:45:28,360 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:45:28,360 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:45:28,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:45:28 BoogieIcfgContainer [2020-10-27 00:45:28,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:45:28,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:45:28,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:45:28,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:45:28,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:45:10" (1/3) ... [2020-10-27 00:45:28,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f601175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:45:28, skipping insertion in model container [2020-10-27 00:45:28,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:45:13" (2/3) ... [2020-10-27 00:45:28,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f601175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:45:28, skipping insertion in model container [2020-10-27 00:45:28,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:45:28" (3/3) ... [2020-10-27 00:45:28,378 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label28.c [2020-10-27 00:45:28,394 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:45:28,401 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:45:28,415 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:45:28,465 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:45:28,466 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:45:28,466 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:45:28,466 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:45:28,466 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:45:28,466 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:45:28,467 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:45:28,467 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:45:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:45:28,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 00:45:28,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:45:28,532 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] [2020-10-27 00:45:28,533 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:45:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:45:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash 776129933, now seen corresponding path program 1 times [2020-10-27 00:45:28,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:45:28,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547689943] [2020-10-27 00:45:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:45:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:28,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:29,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:29,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 00:45:29,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:45:29,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-27 00:45:29,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:29,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:45:29,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:45:29,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 00:45:29,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:45:29,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:45:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:29,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:29,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:29,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:45:29,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:45:29,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 00:45:29,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:29,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:45:29,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:45:29,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:45:29,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:45:29,662 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 00:45:29,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547689943] [2020-10-27 00:45:29,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:45:29,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:45:29,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036127963] [2020-10-27 00:45:29,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:45:29,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:45:29,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:45:29,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:45:29,697 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:45:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:45:56,080 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-27 00:45:56,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:45:56,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 00:45:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:45:56,126 INFO L225 Difference]: With dead ends: 5116 [2020-10-27 00:45:56,126 INFO L226 Difference]: Without dead ends: 3271 [2020-10-27 00:45:56,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:45:56,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-27 00:45:56,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-27 00:45:56,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-27 00:45:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-27 00:45:56,367 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 30 [2020-10-27 00:45:56,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:45:56,367 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-27 00:45:56,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:45:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-27 00:45:56,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 00:45:56,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:45:56,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:45:56,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:45:56,374 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:45:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:45:56,374 INFO L82 PathProgramCache]: Analyzing trace with hash 10325299, now seen corresponding path program 1 times [2020-10-27 00:45:56,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:45:56,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217267404] [2020-10-27 00:45:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:45:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:56,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:56,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:57,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:57,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 00:45:57,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:45:57,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1264 [2020-10-27 00:45:57,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:57,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:45:57,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:45:57,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:45:57,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:45:57,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:45:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:57,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:57,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:57,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:45:57,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:45:57,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 00:45:57,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:57,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:45:57,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:45:57,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:45:57,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-27 00:45:57,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:45:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:57,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:58,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:58,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 00:45:58,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:45:58,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-27 00:45:58,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:58,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:45:58,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:45:58,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:45:58,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:45:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:45:58,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217267404] [2020-10-27 00:45:58,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:45:58,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:45:58,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359245905] [2020-10-27 00:45:58,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:45:58,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:45:58,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:45:58,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:45:58,194 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 7 states. [2020-10-27 00:46:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:46:36,395 INFO L93 Difference]: Finished difference Result 9487 states and 16356 transitions. [2020-10-27 00:46:36,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:46:36,397 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 102 [2020-10-27 00:46:36,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:46:36,434 INFO L225 Difference]: With dead ends: 9487 [2020-10-27 00:46:36,434 INFO L226 Difference]: Without dead ends: 6293 [2020-10-27 00:46:36,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:46:36,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6293 states. [2020-10-27 00:46:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6293 to 6190. [2020-10-27 00:46:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6190 states. [2020-10-27 00:46:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6190 states to 6190 states and 10269 transitions. [2020-10-27 00:46:36,634 INFO L78 Accepts]: Start accepts. Automaton has 6190 states and 10269 transitions. Word has length 102 [2020-10-27 00:46:36,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:46:36,635 INFO L481 AbstractCegarLoop]: Abstraction has 6190 states and 10269 transitions. [2020-10-27 00:46:36,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:46:36,635 INFO L276 IsEmpty]: Start isEmpty. Operand 6190 states and 10269 transitions. [2020-10-27 00:46:36,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 00:46:36,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:46:36,637 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:46:36,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:46:36,638 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:46:36,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:46:36,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1208723772, now seen corresponding path program 1 times [2020-10-27 00:46:36,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:46:36,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350024935] [2020-10-27 00:46:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:46:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:36,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:36,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:37,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:37,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:37,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 00:46:37,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:46:37,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 992 [2020-10-27 00:46:37,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:37,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:46:37,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:46:37,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 00:46:37,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:46:37,889 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:46:37,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:46:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:37,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:37,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:37,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:46:37,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:46:37,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:46:37,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:37,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:46:37,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:46:37,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:46:37,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:46:37,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:46:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:37,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:38,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:38,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:38,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:46:38,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:46:38,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 00:46:38,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:46:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:46:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:46:38,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:46:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:46:38,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350024935] [2020-10-27 00:46:38,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:46:38,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:46:38,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788376691] [2020-10-27 00:46:38,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:46:38,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:46:38,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:46:38,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:46:38,236 INFO L87 Difference]: Start difference. First operand 6190 states and 10269 transitions. Second operand 6 states. [2020-10-27 00:47:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:47:15,867 INFO L93 Difference]: Finished difference Result 18215 states and 30506 transitions. [2020-10-27 00:47:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:47:15,870 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2020-10-27 00:47:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:47:15,936 INFO L225 Difference]: With dead ends: 18215 [2020-10-27 00:47:15,936 INFO L226 Difference]: Without dead ends: 12031 [2020-10-27 00:47:15,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:47:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12031 states. [2020-10-27 00:47:16,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12031 to 12004. [2020-10-27 00:47:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12004 states. [2020-10-27 00:47:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12004 states to 12004 states and 17169 transitions. [2020-10-27 00:47:16,332 INFO L78 Accepts]: Start accepts. Automaton has 12004 states and 17169 transitions. Word has length 105 [2020-10-27 00:47:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:47:16,333 INFO L481 AbstractCegarLoop]: Abstraction has 12004 states and 17169 transitions. [2020-10-27 00:47:16,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:47:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 12004 states and 17169 transitions. [2020-10-27 00:47:16,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 00:47:16,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:47:16,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:47:16,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:47:16,352 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:47:16,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:47:16,353 INFO L82 PathProgramCache]: Analyzing trace with hash 898516354, now seen corresponding path program 1 times [2020-10-27 00:47:16,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:47:16,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149934601] [2020-10-27 00:47:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:47:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:47:16,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:16,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:16,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:18,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:47:18,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 00:47:18,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:47:18,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1727 [2020-10-27 00:47:18,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:47:18,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:47:18,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:47:18,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:47:18,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:47:18,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:47:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:47:18,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:18,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:47:18,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:47:18,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:47:18,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:47:18,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:47:18,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:47:18,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:47:18,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:47:18,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:47:18,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:47:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:47:18,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:18,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:47:18,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:47:18,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:47:18,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 00:47:18,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:47:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:47:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:47:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:47:18,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:47:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:47:18,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149934601] [2020-10-27 00:47:18,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:47:18,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:47:18,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998568612] [2020-10-27 00:47:18,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:47:18,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:47:18,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:47:18,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:47:18,757 INFO L87 Difference]: Start difference. First operand 12004 states and 17169 transitions. Second operand 7 states. [2020-10-27 00:47:18,908 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:48:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:48:18,815 INFO L93 Difference]: Finished difference Result 36420 states and 53082 transitions. [2020-10-27 00:48:18,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:48:18,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-10-27 00:48:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:48:18,906 INFO L225 Difference]: With dead ends: 36420 [2020-10-27 00:48:18,906 INFO L226 Difference]: Without dead ends: 24422 [2020-10-27 00:48:18,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:48:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24422 states. [2020-10-27 00:48:19,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24422 to 23968. [2020-10-27 00:48:19,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23968 states. [2020-10-27 00:48:19,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23968 states to 23968 states and 31045 transitions. [2020-10-27 00:48:19,520 INFO L78 Accepts]: Start accepts. Automaton has 23968 states and 31045 transitions. Word has length 131 [2020-10-27 00:48:19,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:48:19,521 INFO L481 AbstractCegarLoop]: Abstraction has 23968 states and 31045 transitions. [2020-10-27 00:48:19,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:48:19,521 INFO L276 IsEmpty]: Start isEmpty. Operand 23968 states and 31045 transitions. [2020-10-27 00:48:19,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-27 00:48:19,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:48:19,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:19,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:48:19,531 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:48:19,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:48:19,532 INFO L82 PathProgramCache]: Analyzing trace with hash 854885302, now seen corresponding path program 1 times [2020-10-27 00:48:19,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:48:19,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144347665] [2020-10-27 00:48:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:48:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:48:19,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:48:20,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:48:21,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:48:21,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-27 00:48:21,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:48:21,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1795 [2020-10-27 00:48:21,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:48:21,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:48:21,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:48:21,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 220 [2020-10-27 00:48:21,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:48:21,591 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:48:21,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:48:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:48:21,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:48:21,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:48:21,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:48:21,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:48:21,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:48:21,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:48:21,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:48:21,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:48:21,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:48:21,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:48:21,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:48:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:48:21,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:48:22,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:48:22,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-27 00:48:22,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:48:22,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-27 00:48:22,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:48:22,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:48:22,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:48:22,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-27 00:48:22,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:48:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:48:22,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144347665] [2020-10-27 00:48:22,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:48:22,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:48:22,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543684650] [2020-10-27 00:48:22,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:48:22,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:48:22,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:48:22,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:48:22,493 INFO L87 Difference]: Start difference. First operand 23968 states and 31045 transitions. Second operand 7 states. [2020-10-27 00:48:24,826 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 67