/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 17:52:54,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 17:52:54,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 17:52:54,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 17:52:54,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 17:52:54,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 17:52:54,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 17:52:54,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 17:52:54,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 17:52:54,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 17:52:54,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 17:52:54,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 17:52:54,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 17:52:54,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 17:52:54,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 17:52:54,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 17:52:54,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 17:52:54,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 17:52:54,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 17:52:54,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 17:52:54,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 17:52:54,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 17:52:54,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 17:52:54,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 17:52:54,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 17:52:54,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 17:52:54,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 17:52:54,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 17:52:54,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 17:52:54,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 17:52:54,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 17:52:54,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 17:52:54,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 17:52:54,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 17:52:54,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 17:52:54,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 17:52:54,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 17:52:54,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 17:52:54,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 17:52:54,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 17:52:54,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 17:52:54,208 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 17:52:54,265 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 17:52:54,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 17:52:54,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 17:52:54,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 17:52:54,271 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 17:52:54,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 17:52:54,272 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 17:52:54,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 17:52:54,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 17:52:54,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 17:52:54,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 17:52:54,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 17:52:54,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 17:52:54,274 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 17:52:54,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 17:52:54,275 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 17:52:54,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 17:52:54,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 17:52:54,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 17:52:54,276 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 17:52:54,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 17:52:54,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 17:52:54,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 17:52:54,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 17:52:54,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 17:52:54,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 17:52:54,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 17:52:54,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 17:52:54,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 17:52:54,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 17:52:54,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 17:52:54,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 17:52:54,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 17:52:54,778 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 17:52:54,779 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 17:52:54,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label00.c [2020-10-27 17:52:54,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50e1ac896/83a5d8e3139e41529b89016f8c7376fa/FLAGa76eff3aa [2020-10-27 17:52:56,143 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 17:52:56,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label00.c [2020-10-27 17:52:56,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50e1ac896/83a5d8e3139e41529b89016f8c7376fa/FLAGa76eff3aa [2020-10-27 17:52:56,448 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50e1ac896/83a5d8e3139e41529b89016f8c7376fa [2020-10-27 17:52:56,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 17:52:56,462 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 17:52:56,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 17:52:56,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 17:52:56,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 17:52:56,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:52:56" (1/1) ... [2020-10-27 17:52:56,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a7665a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:56, skipping insertion in model container [2020-10-27 17:52:56,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:52:56" (1/1) ... [2020-10-27 17:52:56,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 17:52:56,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 17:52:58,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:52:58,301 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 17:52:59,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:52:59,139 INFO L208 MainTranslator]: Completed translation [2020-10-27 17:52:59,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:59 WrapperNode [2020-10-27 17:52:59,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 17:52:59,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 17:52:59,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 17:52:59,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 17:52:59,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:59" (1/1) ... [2020-10-27 17:52:59,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:59" (1/1) ... [2020-10-27 17:52:59,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:59" (1/1) ... [2020-10-27 17:52:59,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:59" (1/1) ... [2020-10-27 17:52:59,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:59" (1/1) ... [2020-10-27 17:52:59,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:59" (1/1) ... [2020-10-27 17:52:59,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:59" (1/1) ... [2020-10-27 17:52:59,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 17:52:59,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 17:52:59,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 17:52:59,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 17:52:59,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 17:52:59,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 17:52:59,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 17:52:59,820 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 17:52:59,820 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 17:52:59,821 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 17:52:59,821 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 17:52:59,821 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 17:52:59,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 17:52:59,821 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 17:52:59,821 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 17:52:59,822 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 17:52:59,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 17:52:59,823 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 17:52:59,823 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 17:52:59,823 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 17:52:59,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 17:52:59,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 17:52:59,825 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 17:52:59,825 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 17:52:59,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 17:52:59,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 17:52:59,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 17:52:59,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 17:52:59,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 17:52:59,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 17:53:13,214 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 17:53:13,214 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 17:53:13,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:53:13 BoogieIcfgContainer [2020-10-27 17:53:13,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 17:53:13,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 17:53:13,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 17:53:13,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 17:53:13,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:52:56" (1/3) ... [2020-10-27 17:53:13,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb9d938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:53:13, skipping insertion in model container [2020-10-27 17:53:13,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:52:59" (2/3) ... [2020-10-27 17:53:13,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb9d938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:53:13, skipping insertion in model container [2020-10-27 17:53:13,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:53:13" (3/3) ... [2020-10-27 17:53:13,231 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label00.c [2020-10-27 17:53:13,244 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 17:53:13,253 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 17:53:13,268 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 17:53:13,306 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 17:53:13,306 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 17:53:13,306 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 17:53:13,306 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 17:53:13,306 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 17:53:13,306 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 17:53:13,306 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 17:53:13,307 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 17:53:13,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 17:53:13,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 17:53:13,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:53:13,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:53:13,361 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:53:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:53:13,369 INFO L82 PathProgramCache]: Analyzing trace with hash 67388114, now seen corresponding path program 1 times [2020-10-27 17:53:13,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:53:13,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701151530] [2020-10-27 17:53:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:53:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:53:13,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:14,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:53:14,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 17:53:14,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:53:14,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 635 [2020-10-27 17:53:14,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:53:14,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 17:53:14,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 17:53:14,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 17:53:14,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 17:53:14,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:53:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:53:14,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:14,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:53:14,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:53:14,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:53:14,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 17:53:14,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:53:14,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:53:14,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:53:14,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:53:14,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:53:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:53:14,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701151530] [2020-10-27 17:53:14,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 17:53:14,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 17:53:14,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721078329] [2020-10-27 17:53:14,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:53:14,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:53:14,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:53:14,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:53:14,534 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 5 states. [2020-10-27 17:53:37,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:53:37,734 INFO L93 Difference]: Finished difference Result 4085 states and 7568 transitions. [2020-10-27 17:53:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 17:53:37,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-10-27 17:53:37,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:53:37,799 INFO L225 Difference]: With dead ends: 4085 [2020-10-27 17:53:37,800 INFO L226 Difference]: Without dead ends: 2873 [2020-10-27 17:53:37,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:53:37,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2020-10-27 17:53:38,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 1935. [2020-10-27 17:53:38,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1935 states. [2020-10-27 17:53:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 3164 transitions. [2020-10-27 17:53:38,107 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 3164 transitions. Word has length 44 [2020-10-27 17:53:38,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:53:38,108 INFO L481 AbstractCegarLoop]: Abstraction has 1935 states and 3164 transitions. [2020-10-27 17:53:38,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:53:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 3164 transitions. [2020-10-27 17:53:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-27 17:53:38,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:53:38,116 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:53:38,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 17:53:38,116 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:53:38,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:53:38,118 INFO L82 PathProgramCache]: Analyzing trace with hash -191470870, now seen corresponding path program 1 times [2020-10-27 17:53:38,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:53:38,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619921181] [2020-10-27 17:53:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:53:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:53:38,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:38,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:39,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:39,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:53:39,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 17:53:39,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:53:39,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1625 [2020-10-27 17:53:39,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:53:39,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 17:53:39,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 17:53:39,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 17:53:39,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:53:40,248 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 29 [2020-10-27 17:53:40,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:53:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:53:40,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:40,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:53:40,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:53:40,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:53:40,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 17:53:40,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:53:40,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:53:40,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:53:40,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:53:40,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:53:40,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:53:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:53:40,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:53:40,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:53:40,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 17:53:40,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:53:40,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 17:53:40,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:53:40,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:53:40,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:53:40,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 17:53:40,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:53:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:53:40,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619921181] [2020-10-27 17:53:40,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:53:40,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:53:40,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468690414] [2020-10-27 17:53:40,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:53:40,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:53:40,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:53:40,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:53:40,813 INFO L87 Difference]: Start difference. First operand 1935 states and 3164 transitions. Second operand 6 states. [2020-10-27 17:53:41,733 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 17:53:42,156 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-10-27 17:54:00,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:54:00,049 INFO L93 Difference]: Finished difference Result 3900 states and 6366 transitions. [2020-10-27 17:54:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 17:54:00,060 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2020-10-27 17:54:00,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:54:00,077 INFO L225 Difference]: With dead ends: 3900 [2020-10-27 17:54:00,078 INFO L226 Difference]: Without dead ends: 1939 [2020-10-27 17:54:00,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 17:54:00,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2020-10-27 17:54:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1935. [2020-10-27 17:54:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1935 states. [2020-10-27 17:54:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 3162 transitions. [2020-10-27 17:54:00,205 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 3162 transitions. Word has length 119 [2020-10-27 17:54:00,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:54:00,207 INFO L481 AbstractCegarLoop]: Abstraction has 1935 states and 3162 transitions. [2020-10-27 17:54:00,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 17:54:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 3162 transitions. [2020-10-27 17:54:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 17:54:00,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:54:00,213 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:54:00,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 17:54:00,214 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:54:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:54:00,214 INFO L82 PathProgramCache]: Analyzing trace with hash -760793503, now seen corresponding path program 1 times [2020-10-27 17:54:00,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:54:00,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439433607] [2020-10-27 17:54:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:54:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:54:00,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:00,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:00,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:01,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:01,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:54:01,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 17:54:01,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:54:01,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1399 [2020-10-27 17:54:01,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:54:01,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:54:01,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 17:54:01,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 17:54:01,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:54:01,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:54:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:54:01,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:01,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:54:01,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:54:01,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:54:01,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 17:54:01,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:54:01,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:54:01,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:54:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:54:01,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:54:01,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:54:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:54:01,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:01,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:02,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:54:02,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 17:54:02,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:54:02,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-27 17:54:02,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:54:02,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:54:02,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 17:54:02,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:54:02,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:54:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:54:02,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439433607] [2020-10-27 17:54:02,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:54:02,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:54:02,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778933668] [2020-10-27 17:54:02,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:54:02,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:54:02,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:54:02,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:54:02,136 INFO L87 Difference]: Start difference. First operand 1935 states and 3162 transitions. Second operand 6 states. [2020-10-27 17:54:45,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:54:45,268 INFO L93 Difference]: Finished difference Result 8869 states and 15014 transitions. [2020-10-27 17:54:45,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 17:54:45,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-10-27 17:54:45,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:54:45,324 INFO L225 Difference]: With dead ends: 8869 [2020-10-27 17:54:45,324 INFO L226 Difference]: Without dead ends: 6940 [2020-10-27 17:54:45,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 17:54:45,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6940 states. [2020-10-27 17:54:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6940 to 6880. [2020-10-27 17:54:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6880 states. [2020-10-27 17:54:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6880 states to 6880 states and 10302 transitions. [2020-10-27 17:54:45,594 INFO L78 Accepts]: Start accepts. Automaton has 6880 states and 10302 transitions. Word has length 126 [2020-10-27 17:54:45,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:54:45,597 INFO L481 AbstractCegarLoop]: Abstraction has 6880 states and 10302 transitions. [2020-10-27 17:54:45,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 17:54:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 6880 states and 10302 transitions. [2020-10-27 17:54:45,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 17:54:45,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:54:45,610 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:54:45,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 17:54:45,610 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:54:45,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:54:45,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1426509398, now seen corresponding path program 1 times [2020-10-27 17:54:45,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:54:45,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816789572] [2020-10-27 17:54:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:54:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:54:45,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:45,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:46,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:54:46,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 17:54:46,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:54:46,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1122 [2020-10-27 17:54:46,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:54:46,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:54:46,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 17:54:46,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 17:54:46,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:54:46,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:54:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:54:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:46,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:54:46,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:54:46,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:54:46,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:54:46,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:54:46,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:54:46,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:54:46,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:54:46,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:54:46,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:54:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:54:47,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:54:47,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:54:47,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 17:54:47,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:54:47,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 17:54:47,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:54:47,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:54:47,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:54:47,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 17:54:47,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:54:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:54:47,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816789572] [2020-10-27 17:54:47,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:54:47,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:54:47,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685686730] [2020-10-27 17:54:47,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:54:47,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:54:47,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:54:47,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:54:47,195 INFO L87 Difference]: Start difference. First operand 6880 states and 10302 transitions. Second operand 5 states. [2020-10-27 17:55:17,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:55:17,210 INFO L93 Difference]: Finished difference Result 17081 states and 26256 transitions. [2020-10-27 17:55:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:55:17,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2020-10-27 17:55:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:55:17,288 INFO L225 Difference]: With dead ends: 17081 [2020-10-27 17:55:17,288 INFO L226 Difference]: Without dead ends: 10207 [2020-10-27 17:55:17,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:55:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10207 states. [2020-10-27 17:55:17,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10207 to 10158. [2020-10-27 17:55:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10158 states. [2020-10-27 17:55:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10158 states to 10158 states and 14827 transitions. [2020-10-27 17:55:17,719 INFO L78 Accepts]: Start accepts. Automaton has 10158 states and 14827 transitions. Word has length 145 [2020-10-27 17:55:17,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:55:17,721 INFO L481 AbstractCegarLoop]: Abstraction has 10158 states and 14827 transitions. [2020-10-27 17:55:17,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:55:17,722 INFO L276 IsEmpty]: Start isEmpty. Operand 10158 states and 14827 transitions. [2020-10-27 17:55:17,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 17:55:17,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:55:17,730 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:55:17,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 17:55:17,731 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:55:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:55:17,731 INFO L82 PathProgramCache]: Analyzing trace with hash 562044715, now seen corresponding path program 1 times [2020-10-27 17:55:17,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:55:17,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603659762] [2020-10-27 17:55:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:55:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:17,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:18,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:18,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-27 17:55:18,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:18,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-27 17:55:18,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:18,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 17:55:18,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 17:55:18,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-27 17:55:18,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:18,490 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 17:55:18,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:55:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:18,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:18,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:18,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:55:18,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:18,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 17:55:18,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:18,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:55:18,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:55:18,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:55:18,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:18,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:55:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:18,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:18,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:55:18,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 17:55:18,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:55:18,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-27 17:55:18,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:55:18,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:55:18,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:55:18,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-27 17:55:18,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:55:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:55:18,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603659762] [2020-10-27 17:55:18,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 17:55:18,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 17:55:18,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404451103] [2020-10-27 17:55:18,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:55:18,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:55:18,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:55:18,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:55:18,991 INFO L87 Difference]: Start difference. First operand 10158 states and 14827 transitions. Second operand 7 states. [2020-10-27 17:55:58,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:55:58,136 INFO L93 Difference]: Finished difference Result 30565 states and 47549 transitions. [2020-10-27 17:55:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 17:55:58,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2020-10-27 17:55:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:55:58,266 INFO L225 Difference]: With dead ends: 30565 [2020-10-27 17:55:58,267 INFO L226 Difference]: Without dead ends: 20413 [2020-10-27 17:55:58,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 17:55:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20413 states. [2020-10-27 17:55:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20413 to 20324. [2020-10-27 17:55:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20324 states. [2020-10-27 17:55:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20324 states to 20324 states and 29260 transitions. [2020-10-27 17:55:59,073 INFO L78 Accepts]: Start accepts. Automaton has 20324 states and 29260 transitions. Word has length 163 [2020-10-27 17:55:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:55:59,073 INFO L481 AbstractCegarLoop]: Abstraction has 20324 states and 29260 transitions. [2020-10-27 17:55:59,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 17:55:59,074 INFO L276 IsEmpty]: Start isEmpty. Operand 20324 states and 29260 transitions. [2020-10-27 17:55:59,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-27 17:55:59,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:55:59,082 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:55:59,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 17:55:59,083 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:55:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:55:59,083 INFO L82 PathProgramCache]: Analyzing trace with hash -279846344, now seen corresponding path program 1 times [2020-10-27 17:55:59,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:55:59,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639397680] [2020-10-27 17:55:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:55:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:55:59,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:55:59,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:00,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:00,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:04,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:04,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-27 17:56:04,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:56:04,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 17:56:04,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:04,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:56:04,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-10-27 17:56:04,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 17:56:04,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:04,379 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 17:56:04,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:56:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:04,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:04,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:04,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:56:04,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:56:04,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 17:56:04,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:04,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:56:04,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:56:04,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:56:04,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:04,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:56:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:04,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:04,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:04,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 17:56:04,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:56:04,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 17:56:04,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:04,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:56:04,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:56:04,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:56:04,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:04,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-27 17:56:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:04,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:04,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:04,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 17:56:04,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:56:04,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-27 17:56:04,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:04,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:56:04,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:56:04,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 17:56:04,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-27 17:56:04,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639397680] [2020-10-27 17:56:04,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:56:04,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:56:04,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857925379] [2020-10-27 17:56:04,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:56:04,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:56:04,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:56:04,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:56:04,703 INFO L87 Difference]: Start difference. First operand 20324 states and 29260 transitions. Second operand 5 states. [2020-10-27 17:56:05,742 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 17:56:45,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:56:45,435 INFO L93 Difference]: Finished difference Result 50499 states and 75697 transitions. [2020-10-27 17:56:45,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:56:45,441 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 205 [2020-10-27 17:56:45,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:56:45,637 INFO L225 Difference]: With dead ends: 50499 [2020-10-27 17:56:45,637 INFO L226 Difference]: Without dead ends: 30181 [2020-10-27 17:56:45,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:56:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30181 states. [2020-10-27 17:56:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30181 to 30165. [2020-10-27 17:56:46,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30165 states. [2020-10-27 17:56:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30165 states to 30165 states and 43418 transitions. [2020-10-27 17:56:46,993 INFO L78 Accepts]: Start accepts. Automaton has 30165 states and 43418 transitions. Word has length 205 [2020-10-27 17:56:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:56:46,994 INFO L481 AbstractCegarLoop]: Abstraction has 30165 states and 43418 transitions. [2020-10-27 17:56:46,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:56:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 30165 states and 43418 transitions. [2020-10-27 17:56:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-27 17:56:47,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:56:47,015 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:56:47,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 17:56:47,016 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:56:47,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:56:47,019 INFO L82 PathProgramCache]: Analyzing trace with hash 463483208, now seen corresponding path program 1 times [2020-10-27 17:56:47,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:56:47,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733964209] [2020-10-27 17:56:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:56:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:47,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:47,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:47,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:48,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:48,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:49,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:50,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:50,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-27 17:56:50,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 17:56:50,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3793 [2020-10-27 17:56:50,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:50,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:56:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 206 [2020-10-27 17:56:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 17:56:50,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:56:51,113 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 17:56:51,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:56:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:51,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:51,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:51,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:56:51,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:56:51,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:56:51,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:51,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:56:51,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:56:51,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:56:51,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:51,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:56:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:51,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:51,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:51,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 17:56:51,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:56:51,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 17:56:51,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:51,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:56:51,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:56:51,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:56:51,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:51,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-27 17:56:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:56:51,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:56:51,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:56:51,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 17:56:51,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:56:51,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 17:56:51,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:56:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:56:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 17:56:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:56:51,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:56:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-27 17:56:51,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733964209] [2020-10-27 17:56:51,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:56:51,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 17:56:51,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182336408] [2020-10-27 17:56:51,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 17:56:51,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:56:51,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 17:56:51,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:56:51,604 INFO L87 Difference]: Start difference. First operand 30165 states and 43418 transitions. Second operand 6 states.