/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_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:48:12,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:48:12,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:48:13,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:48:13,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:48:13,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:48:13,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:48:13,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:48:13,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:48:13,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:48:13,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:48:13,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:48:13,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:48:13,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:48:13,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:48:13,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:48:13,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:48:13,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:48:13,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:48:13,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:48:13,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:48:13,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:48:13,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:48:13,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:48:13,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:48:13,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:48:13,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:48:13,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:48:13,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:48:13,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:48:13,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:48:13,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:48:13,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:48:13,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:48:13,127 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:48:13,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:48:13,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:48:13,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:48:13,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:48:13,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:48:13,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:48:13,154 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 00:48:13,212 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:48:13,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:48:13,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:48:13,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:48:13,218 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:48:13,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:48:13,218 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:48:13,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:48:13,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:48:13,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:48:13,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:48:13,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:48:13,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:48:13,221 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:48:13,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:48:13,222 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:48:13,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:48:13,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:48:13,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:48:13,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:48:13,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:48:13,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:48:13,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:48:13,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:48:13,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:48:13,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:48:13,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:48:13,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:48:13,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:48:13,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:48:13,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:48:13,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:48:13,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:48:13,679 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:48:13,680 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:48:13,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label39.c [2020-10-27 00:48:13,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71216c3a4/b0e1220e6aff4d9ebbffd7e569db4b44/FLAGf517020e8 [2020-10-27 00:48:15,040 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:48:15,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label39.c [2020-10-27 00:48:15,097 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71216c3a4/b0e1220e6aff4d9ebbffd7e569db4b44/FLAGf517020e8 [2020-10-27 00:48:15,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71216c3a4/b0e1220e6aff4d9ebbffd7e569db4b44 [2020-10-27 00:48:15,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:48:15,262 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:48:15,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:48:15,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:48:15,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:48:15,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:48:15" (1/1) ... [2020-10-27 00:48:15,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66ba71b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:15, skipping insertion in model container [2020-10-27 00:48:15,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:48:15" (1/1) ... [2020-10-27 00:48:15,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:48:15,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:48:17,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:48:17,712 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:48:19,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:48:19,149 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:48:19,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:19 WrapperNode [2020-10-27 00:48:19,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:48:19,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:48:19,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:48:19,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:48:19,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:19" (1/1) ... [2020-10-27 00:48:19,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:19" (1/1) ... [2020-10-27 00:48:19,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:19" (1/1) ... [2020-10-27 00:48:19,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:19" (1/1) ... [2020-10-27 00:48:19,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:19" (1/1) ... [2020-10-27 00:48:19,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:19" (1/1) ... [2020-10-27 00:48:19,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:19" (1/1) ... [2020-10-27 00:48:19,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:48:19,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:48:19,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:48:19,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:48:19,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:19" (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 00:48:19,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:48:19,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:48:19,824 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:48:19,825 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:48:19,825 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:48:19,825 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:48:19,825 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:48:19,826 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:48:19,826 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:48:19,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:48:19,827 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:48:19,827 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:48:19,827 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:48:19,827 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:48:19,828 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:48:19,828 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:48:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:48:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:48:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:48:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:48:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:48:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:48:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:48:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:48:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:48:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:48:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:48:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:48:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:48:33,264 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:48:33,264 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:48:33,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:48:33 BoogieIcfgContainer [2020-10-27 00:48:33,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:48:33,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:48:33,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:48:33,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:48:33,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:48:15" (1/3) ... [2020-10-27 00:48:33,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64be0a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:48:33, skipping insertion in model container [2020-10-27 00:48:33,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:48:19" (2/3) ... [2020-10-27 00:48:33,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64be0a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:48:33, skipping insertion in model container [2020-10-27 00:48:33,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:48:33" (3/3) ... [2020-10-27 00:48:33,279 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label39.c [2020-10-27 00:48:33,291 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:48:33,297 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:48:33,311 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:48:33,349 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:48:33,349 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:48:33,349 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:48:33,349 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:48:33,349 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:48:33,350 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:48:33,350 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:48:33,350 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:48:33,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:48:33,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 00:48:33,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:48:33,411 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] [2020-10-27 00:48:33,412 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:48:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:48:33,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1492854227, now seen corresponding path program 1 times [2020-10-27 00:48:33,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:48:33,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534338685] [2020-10-27 00:48:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:48:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:48:33,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:48:34,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:48:34,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 00:48:34,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:48:34,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 579 [2020-10-27 00:48:34,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:48:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:48:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:48:34,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 00:48:34,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:48:34,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:48:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:48:34,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:48:34,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:48:34,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:48:34,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:48:34,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 00:48:34,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:48:34,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:48:34,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:48:34,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:48:34,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:48:34,456 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 00:48:34,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534338685] [2020-10-27 00:48:34,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:48:34,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:48:34,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294722204] [2020-10-27 00:48:34,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:48:34,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:48:34,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:48:34,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:48:34,483 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-27 00:49:04,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:49:04,165 INFO L93 Difference]: Finished difference Result 5092 states and 9568 transitions. [2020-10-27 00:49:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:49:04,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-10-27 00:49:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:49:04,223 INFO L225 Difference]: With dead ends: 5092 [2020-10-27 00:49:04,223 INFO L226 Difference]: Without dead ends: 3247 [2020-10-27 00:49:04,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:49:04,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2020-10-27 00:49:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 3180. [2020-10-27 00:49:04,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3180 states. [2020-10-27 00:49:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 5851 transitions. [2020-10-27 00:49:04,469 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 5851 transitions. Word has length 38 [2020-10-27 00:49:04,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:49:04,470 INFO L481 AbstractCegarLoop]: Abstraction has 3180 states and 5851 transitions. [2020-10-27 00:49:04,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:49:04,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 5851 transitions. [2020-10-27 00:49:04,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 00:49:04,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:49:04,482 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:49:04,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:49:04,484 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:49:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:49:04,485 INFO L82 PathProgramCache]: Analyzing trace with hash -134453990, now seen corresponding path program 1 times [2020-10-27 00:49:04,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:49:04,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636013795] [2020-10-27 00:49:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:49:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:04,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:04,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:04,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:05,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:05,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 00:49:05,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:49:05,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-27 00:49:05,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:05,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:49:05,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:49:05,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:49:05,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:49:05,794 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:49:05,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:49:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:05,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:05,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:05,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:49:05,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:49:05,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 00:49:05,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:05,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:49:05,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:49:05,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:49:05,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:49:05,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:49:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:05,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:05,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:06,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:06,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:49:06,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:49:06,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-27 00:49:06,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:06,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:49:06,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:49:06,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:49:06,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:49:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:49:06,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636013795] [2020-10-27 00:49:06,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:49:06,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:49:06,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773226320] [2020-10-27 00:49:06,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:49:06,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:49:06,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:49:06,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:49:06,124 INFO L87 Difference]: Start difference. First operand 3180 states and 5851 transitions. Second operand 7 states. [2020-10-27 00:49:46,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:49:46,794 INFO L93 Difference]: Finished difference Result 9420 states and 17520 transitions. [2020-10-27 00:49:46,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:49:46,797 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-27 00:49:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:49:46,845 INFO L225 Difference]: With dead ends: 9420 [2020-10-27 00:49:46,846 INFO L226 Difference]: Without dead ends: 6246 [2020-10-27 00:49:46,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:49:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2020-10-27 00:49:47,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 6107. [2020-10-27 00:49:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6107 states. [2020-10-27 00:49:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6107 states to 6107 states and 10412 transitions. [2020-10-27 00:49:47,095 INFO L78 Accepts]: Start accepts. Automaton has 6107 states and 10412 transitions. Word has length 109 [2020-10-27 00:49:47,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:49:47,097 INFO L481 AbstractCegarLoop]: Abstraction has 6107 states and 10412 transitions. [2020-10-27 00:49:47,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:49:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 6107 states and 10412 transitions. [2020-10-27 00:49:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 00:49:47,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:49:47,109 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:49:47,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:49:47,110 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:49:47,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:49:47,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1540518773, now seen corresponding path program 1 times [2020-10-27 00:49:47,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:49:47,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089844443] [2020-10-27 00:49:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:49:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:47,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:47,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:47,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:47,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 00:49:47,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:49:47,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-27 00:49:47,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:47,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:49:47,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:49:47,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:49:47,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:49:48,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:49:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:48,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:48,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:48,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:49:48,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:49:48,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 00:49:48,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:48,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:49:48,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:49:48,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:49:48,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:49:48,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:49:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:48,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:48,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:48,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 00:49:48,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:49:48,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-27 00:49:48,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:48,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:49:48,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:49:48,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:49:48,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:49:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:49:48,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089844443] [2020-10-27 00:49:48,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:49:48,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:49:48,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860574451] [2020-10-27 00:49:48,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:49:48,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:49:48,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:49:48,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:49:48,420 INFO L87 Difference]: Start difference. First operand 6107 states and 10412 transitions. Second operand 7 states. [2020-10-27 00:50:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:50:45,942 INFO L93 Difference]: Finished difference Result 17050 states and 28991 transitions. [2020-10-27 00:50:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:50:45,945 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2020-10-27 00:50:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:50:46,003 INFO L225 Difference]: With dead ends: 17050 [2020-10-27 00:50:46,003 INFO L226 Difference]: Without dead ends: 10949 [2020-10-27 00:50:46,021 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 00:50:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10949 states. [2020-10-27 00:50:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10949 to 10678. [2020-10-27 00:50:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10678 states. [2020-10-27 00:50:46,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10678 states to 10678 states and 16012 transitions. [2020-10-27 00:50:46,311 INFO L78 Accepts]: Start accepts. Automaton has 10678 states and 16012 transitions. Word has length 114 [2020-10-27 00:50:46,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:50:46,313 INFO L481 AbstractCegarLoop]: Abstraction has 10678 states and 16012 transitions. [2020-10-27 00:50:46,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:50:46,317 INFO L276 IsEmpty]: Start isEmpty. Operand 10678 states and 16012 transitions. [2020-10-27 00:50:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 00:50:46,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:50:46,320 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:50:46,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:50:46,320 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:50:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:50:46,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2141200807, now seen corresponding path program 1 times [2020-10-27 00:50:46,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:50:46,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676536125] [2020-10-27 00:50:46,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:50:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:46,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:46,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:47,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:47,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:47,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:48,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:48,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 00:50:48,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:50:48,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2226 [2020-10-27 00:50:48,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:48,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:50:48,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:50:48,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-27 00:50:48,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:50:48,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:50:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:48,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:48,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:48,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:50:48,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:50:48,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:50:48,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:48,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:50:48,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:50:48,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:50:48,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:50:48,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:50:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:48,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:48,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:49,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:49,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:50:49,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:50:49,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-27 00:50:49,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:49,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:50:49,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:50:49,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:50:49,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:50:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:50:49,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676536125] [2020-10-27 00:50:49,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:50:49,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:50:49,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112972563] [2020-10-27 00:50:49,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:50:49,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:50:49,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:50:49,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:50:49,271 INFO L87 Difference]: Start difference. First operand 10678 states and 16012 transitions. Second operand 7 states. [2020-10-27 00:51:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:51:53,564 INFO L93 Difference]: Finished difference Result 30694 states and 46926 transitions. [2020-10-27 00:51:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:51:53,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-10-27 00:51:53,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:51:53,674 INFO L225 Difference]: With dead ends: 30694 [2020-10-27 00:51:53,674 INFO L226 Difference]: Without dead ends: 20022 [2020-10-27 00:51:53,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:51:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20022 states. [2020-10-27 00:51:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20022 to 19691. [2020-10-27 00:51:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19691 states. [2020-10-27 00:51:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19691 states to 19691 states and 27640 transitions. [2020-10-27 00:51:54,282 INFO L78 Accepts]: Start accepts. Automaton has 19691 states and 27640 transitions. Word has length 124 [2020-10-27 00:51:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:51:54,284 INFO L481 AbstractCegarLoop]: Abstraction has 19691 states and 27640 transitions. [2020-10-27 00:51:54,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:51:54,284 INFO L276 IsEmpty]: Start isEmpty. Operand 19691 states and 27640 transitions. [2020-10-27 00:51:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-27 00:51:54,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:51:54,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:51:54,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:51:54,288 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:51:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:51:54,289 INFO L82 PathProgramCache]: Analyzing trace with hash 376826059, now seen corresponding path program 1 times [2020-10-27 00:51:54,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:51:54,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816664222] [2020-10-27 00:51:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:51:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:54,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:54,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:55,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:56,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:56,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-27 00:51:56,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:51:56,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1975 [2020-10-27 00:51:56,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:56,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:51:56,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:51:56,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-27 00:51:56,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:56,517 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:51:56,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:51:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:56,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:56,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:56,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:51:56,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:56,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 00:51:56,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:56,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:51:56,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:51:56,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:51:56,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:56,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:51:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:56,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:56,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:56,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 00:51:56,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:56,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-27 00:51:56,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:56,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:51:56,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:51:56,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-27 00:51:56,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:51:57,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816664222] [2020-10-27 00:51:57,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:51:57,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:51:57,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996545106] [2020-10-27 00:51:57,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:51:57,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:51:57,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:51:57,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:51:57,035 INFO L87 Difference]: Start difference. First operand 19691 states and 27640 transitions. Second operand 7 states. [2020-10-27 00:51:57,205 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:52:05,135 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66