/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:58:08,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:58:08,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:58:08,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:58:08,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:58:08,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:58:08,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:58:08,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:58:08,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:58:08,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:58:08,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:58:08,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:58:08,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:58:08,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:58:08,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:58:08,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:58:08,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:58:08,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:58:08,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:58:08,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:58:08,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:58:08,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:58:08,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:58:08,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:58:08,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:58:08,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:58:08,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:58:08,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:58:08,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:58:08,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:58:08,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:58:08,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:58:08,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:58:08,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:58:08,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:58:08,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:58:08,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:58:08,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:58:08,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:58:08,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:58:08,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:58:08,920 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 [2020-10-28 10:58:08,973 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:58:08,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:58:08,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:58:08,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:58:08,978 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:58:08,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:58:08,978 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:58:08,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:58:08,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:58:08,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:58:08,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:58:08,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:58:08,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:58:08,979 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:58:08,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:58:08,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:58:08,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:58:08,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:58:08,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:58:08,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:58:08,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:58:08,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:58:08,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:58:08,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:58:08,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:58:08,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:58:08,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:58:08,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:58:08,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:58:08,984 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:58:09,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:58:09,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:58:09,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:58:09,421 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:58:09,422 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:58:09,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label15.c [2020-10-28 10:58:09,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb07103e3/3cfd0a5762f94dd5b0b1989ab2935e06/FLAG6ed8a3000 [2020-10-28 10:58:10,932 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:58:10,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label15.c [2020-10-28 10:58:10,977 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb07103e3/3cfd0a5762f94dd5b0b1989ab2935e06/FLAG6ed8a3000 [2020-10-28 10:58:11,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb07103e3/3cfd0a5762f94dd5b0b1989ab2935e06 [2020-10-28 10:58:11,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:58:11,158 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:58:11,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:58:11,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:58:11,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:58:11,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:58:11" (1/1) ... [2020-10-28 10:58:11,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e3d02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:58:11, skipping insertion in model container [2020-10-28 10:58:11,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:58:11" (1/1) ... [2020-10-28 10:58:11,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:58:11,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:58:13,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:58:13,423 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:58:14,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:58:14,715 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:58:14,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:58:14 WrapperNode [2020-10-28 10:58:14,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:58:14,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:58:14,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:58:14,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:58:14,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:58:14" (1/1) ... [2020-10-28 10:58:14,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:58:14" (1/1) ... [2020-10-28 10:58:14,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:58:14" (1/1) ... [2020-10-28 10:58:14,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:58:14" (1/1) ... [2020-10-28 10:58:15,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:58:14" (1/1) ... [2020-10-28 10:58:15,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:58:14" (1/1) ... [2020-10-28 10:58:15,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:58:14" (1/1) ... [2020-10-28 10:58:15,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:58:15,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:58:15,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:58:15,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:58:15,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:58:14" (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 [2020-10-28 10:58:15,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:58:15,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:58:15,260 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:58:15,260 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:58:15,261 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 10:58:15,261 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 10:58:15,261 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 10:58:15,261 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 10:58:15,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:58:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:58:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 10:58:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 10:58:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 10:58:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 10:58:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:58:15,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:58:15,264 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:58:15,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:58:15,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:58:15,265 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:58:15,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:58:15,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:58:15,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:58:15,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:58:15,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:58:15,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:58:15,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:58:23,559 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:58:23,560 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:58:23,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:58:23 BoogieIcfgContainer [2020-10-28 10:58:23,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:58:23,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:58:23,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:58:23,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:58:23,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:58:11" (1/3) ... [2020-10-28 10:58:23,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589e0a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:58:23, skipping insertion in model container [2020-10-28 10:58:23,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:58:14" (2/3) ... [2020-10-28 10:58:23,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589e0a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:58:23, skipping insertion in model container [2020-10-28 10:58:23,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:58:23" (3/3) ... [2020-10-28 10:58:23,576 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label15.c [2020-10-28 10:58:23,589 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:58:23,596 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:58:23,611 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:58:23,657 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:58:23,657 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:58:23,658 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:58:23,658 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:58:23,659 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:58:23,659 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:58:23,659 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:58:23,659 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:58:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-28 10:58:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2020-10-28 10:58:23,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:58:23,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:58:23,791 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:58:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:58:23,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1013859436, now seen corresponding path program 1 times [2020-10-28 10:58:23,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:58:23,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240376926] [2020-10-28 10:58:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:58:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:58:25,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:26,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:29,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:58:29,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 979 [2020-10-28 10:58:29,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:58:29,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 10:58:29,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:58:29,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:58:29,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 10:58:29,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:58:29,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 970 [2020-10-28 10:58:29,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 10:58:31,317 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:58:31,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:58:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:58:31,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:31,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:58:31,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:58:31,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:58:31,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 10:58:31,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:58:31,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:58:31,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:58:31,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:58:31,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:58:31,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:58:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:58:32,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240376926] [2020-10-28 10:58:32,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:58:32,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:58:32,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714699579] [2020-10-28 10:58:32,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:58:32,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:58:32,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:58:32,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:58:32,591 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-28 10:58:32,907 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:58:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:58:50,073 INFO L93 Difference]: Finished difference Result 3750 states and 6993 transitions. [2020-10-28 10:58:50,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:58:50,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 961 [2020-10-28 10:58:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:58:50,113 INFO L225 Difference]: With dead ends: 3750 [2020-10-28 10:58:50,113 INFO L226 Difference]: Without dead ends: 2367 [2020-10-28 10:58:50,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:58:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2020-10-28 10:58:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 2346. [2020-10-28 10:58:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2346 states. [2020-10-28 10:58:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3865 transitions. [2020-10-28 10:58:50,297 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3865 transitions. Word has length 961 [2020-10-28 10:58:50,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:58:50,300 INFO L481 AbstractCegarLoop]: Abstraction has 2346 states and 3865 transitions. [2020-10-28 10:58:50,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:58:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3865 transitions. [2020-10-28 10:58:50,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2020-10-28 10:58:50,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:58:50,348 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:58:50,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:58:50,349 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:58:50,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:58:50,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1308439085, now seen corresponding path program 1 times [2020-10-28 10:58:50,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:58:50,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574463957] [2020-10-28 10:58:50,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:58:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:58:50,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:52,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:55,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:58:55,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 993 [2020-10-28 10:58:55,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:58:55,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 10:58:55,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:58:55,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:58:55,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:58:55,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:58:55,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:58:55,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:58:56,360 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:58:56,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:58:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:58:56,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:56,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:58:56,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:58:56,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:58:56,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 10:58:56,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:58:56,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:58:56,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:58:56,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:58:56,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:58:56,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:58:56,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:58:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:58:56,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:58:56,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:58:56,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:58:56,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:58:56,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-28 10:58:56,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:58:56,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:58:56,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:58:56,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:58:56,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 10:58:56,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:58:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:58:57,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574463957] [2020-10-28 10:58:57,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:58:57,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:58:57,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494717845] [2020-10-28 10:58:57,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:58:57,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:58:57,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:58:57,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:58:57,266 INFO L87 Difference]: Start difference. First operand 2346 states and 3865 transitions. Second operand 7 states. [2020-10-28 10:58:57,549 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:58:58,622 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:59:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:59:20,460 INFO L93 Difference]: Finished difference Result 6885 states and 11450 transitions. [2020-10-28 10:59:20,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:59:20,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 973 [2020-10-28 10:59:20,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:59:20,489 INFO L225 Difference]: With dead ends: 6885 [2020-10-28 10:59:20,489 INFO L226 Difference]: Without dead ends: 4545 [2020-10-28 10:59:20,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 10:59:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4545 states. [2020-10-28 10:59:20,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4545 to 4504. [2020-10-28 10:59:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4504 states. [2020-10-28 10:59:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 6861 transitions. [2020-10-28 10:59:20,647 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 6861 transitions. Word has length 973 [2020-10-28 10:59:20,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:59:20,648 INFO L481 AbstractCegarLoop]: Abstraction has 4504 states and 6861 transitions. [2020-10-28 10:59:20,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:59:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 6861 transitions. [2020-10-28 10:59:20,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 982 [2020-10-28 10:59:20,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:59:20,670 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:59:20,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:59:20,671 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:59:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:59:20,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1643136138, now seen corresponding path program 1 times [2020-10-28 10:59:20,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:59:20,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575879959] [2020-10-28 10:59:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:59:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:20,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:23,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:26,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:26,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1001 [2020-10-28 10:59:26,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:59:26,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5226 [2020-10-28 10:59:26,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:26,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:26,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:59:26,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:59:26,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 10:59:26,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:59:26,514 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:59:26,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:59:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:26,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:26,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:26,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:59:26,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:59:26,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 10:59:26,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:26,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:26,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:59:26,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:59:26,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:59:26,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:59:26,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:59:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:26,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:26,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:26,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 10:59:26,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:59:26,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 10:59:26,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:26,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:26,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:59:26,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:59:26,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 10:59:26,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:59:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:59:27,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575879959] [2020-10-28 10:59:27,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:59:27,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:59:27,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630376874] [2020-10-28 10:59:27,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:59:27,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:59:27,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:59:27,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:59:27,362 INFO L87 Difference]: Start difference. First operand 4504 states and 6861 transitions. Second operand 7 states. [2020-10-28 10:59:27,673 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:59:29,150 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:59:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:59:49,052 INFO L93 Difference]: Finished difference Result 13770 states and 21448 transitions. [2020-10-28 10:59:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:59:49,059 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 981 [2020-10-28 10:59:49,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:59:49,122 INFO L225 Difference]: With dead ends: 13770 [2020-10-28 10:59:49,122 INFO L226 Difference]: Without dead ends: 9272 [2020-10-28 10:59:49,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:59:49,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9272 states. [2020-10-28 10:59:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9272 to 9033. [2020-10-28 10:59:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9033 states. [2020-10-28 10:59:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9033 states to 9033 states and 12962 transitions. [2020-10-28 10:59:49,411 INFO L78 Accepts]: Start accepts. Automaton has 9033 states and 12962 transitions. Word has length 981 [2020-10-28 10:59:49,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:59:49,412 INFO L481 AbstractCegarLoop]: Abstraction has 9033 states and 12962 transitions. [2020-10-28 10:59:49,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:59:49,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9033 states and 12962 transitions. [2020-10-28 10:59:49,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 989 [2020-10-28 10:59:49,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:59:49,451 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:59:49,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:59:49,451 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:59:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:59:49,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1470460150, now seen corresponding path program 1 times [2020-10-28 10:59:49,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:59:49,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795239656] [2020-10-28 10:59:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:59:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:49,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:51,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:54,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:54,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1008 [2020-10-28 10:59:54,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:59:54,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5235 [2020-10-28 10:59:54,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:54,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:54,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:59:54,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:59:54,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 10:59:54,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:59:55,510 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:59:55,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:59:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:55,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:55,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:55,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:59:55,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:59:55,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 10:59:55,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:55,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:55,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:59:55,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:59:55,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:59:55,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:59:55,671 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 10:59:55,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:59:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:59:55,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:59:55,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:59:55,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 10:59:55,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:59:55,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 10:59:55,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:59:55,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:59:55,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:59:55,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:59:55,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 10:59:55,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:59:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:59:56,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795239656] [2020-10-28 10:59:56,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:59:56,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:59:56,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755094638] [2020-10-28 10:59:56,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:59:56,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:59:56,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:59:56,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:59:56,441 INFO L87 Difference]: Start difference. First operand 9033 states and 12962 transitions. Second operand 7 states. [2020-10-28 10:59:56,747 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:59:58,409 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 11:00:19,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:00:19,006 INFO L93 Difference]: Finished difference Result 27473 states and 41105 transitions. [2020-10-28 11:00:19,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 11:00:19,007 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 988 [2020-10-28 11:00:19,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:00:19,108 INFO L225 Difference]: With dead ends: 27473 [2020-10-28 11:00:19,108 INFO L226 Difference]: Without dead ends: 18446 [2020-10-28 11:00:19,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 11:00:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18446 states. [2020-10-28 11:00:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18446 to 18277. [2020-10-28 11:00:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18277 states. [2020-10-28 11:00:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18277 states to 18277 states and 26000 transitions. [2020-10-28 11:00:19,730 INFO L78 Accepts]: Start accepts. Automaton has 18277 states and 26000 transitions. Word has length 988 [2020-10-28 11:00:19,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:00:19,731 INFO L481 AbstractCegarLoop]: Abstraction has 18277 states and 26000 transitions. [2020-10-28 11:00:19,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:00:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 18277 states and 26000 transitions. [2020-10-28 11:00:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 995 [2020-10-28 11:00:19,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:00:19,808 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:00:19,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 11:00:19,809 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:00:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:00:19,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1188788360, now seen corresponding path program 1 times [2020-10-28 11:00:19,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:00:19,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791942648] [2020-10-28 11:00:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:00:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:00:19,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:20,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:25,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:00:25,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1016 [2020-10-28 11:00:25,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:00:25,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-28 11:00:25,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:00:25,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:00:25,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:00:25,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 11:00:25,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 11:00:25,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:00:25,559 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:00:25,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:00:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:00:25,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:25,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:00:25,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:00:25,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:00:25,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 11:00:25,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:00:25,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:00:25,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:00:25,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:00:25,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:00:25,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:00:25,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:00:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:00:25,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:25,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:00:25,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 11:00:25,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:00:25,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 11:00:25,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:00:25,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:00:25,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:00:25,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:00:25,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 11:00:25,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:00:25,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 11:00:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:00:25,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:00:25,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:00:25,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 11:00:25,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:00:25,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 11:00:25,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:00:25,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:00:25,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:00:25,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:00:25,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 11:00:25,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:00:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 11:00:26,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791942648] [2020-10-28 11:00:26,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:00:26,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 11:00:26,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444264566] [2020-10-28 11:00:26,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 11:00:26,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:00:26,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 11:00:26,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 11:00:26,685 INFO L87 Difference]: Start difference. First operand 18277 states and 26000 transitions. Second operand 8 states. [2020-10-28 11:00:26,951 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:00:27,454 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 11:00:29,921 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 11:00:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:00:57,717 INFO L93 Difference]: Finished difference Result 71633 states and 112087 transitions. [2020-10-28 11:00:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 11:00:57,718 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 994 [2020-10-28 11:00:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:00:57,981 INFO L225 Difference]: With dead ends: 71633 [2020-10-28 11:00:57,981 INFO L226 Difference]: Without dead ends: 53362 [2020-10-28 11:00:58,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-28 11:00:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53362 states. [2020-10-28 11:00:59,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53362 to 53156. [2020-10-28 11:00:59,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53156 states. [2020-10-28 11:01:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53156 states to 53156 states and 80413 transitions. [2020-10-28 11:01:00,133 INFO L78 Accepts]: Start accepts. Automaton has 53156 states and 80413 transitions. Word has length 994 [2020-10-28 11:01:00,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:01:00,133 INFO L481 AbstractCegarLoop]: Abstraction has 53156 states and 80413 transitions. [2020-10-28 11:01:00,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 11:01:00,133 INFO L276 IsEmpty]: Start isEmpty. Operand 53156 states and 80413 transitions. [2020-10-28 11:01:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1020 [2020-10-28 11:01:00,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:01:00,731 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:01:00,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 11:01:00,731 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:01:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:01:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash 239640930, now seen corresponding path program 1 times [2020-10-28 11:01:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:01:00,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882644036] [2020-10-28 11:01:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:01:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:00,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:02,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:06,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:06,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1043 [2020-10-28 11:01:06,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:01:06,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-28 11:01:06,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:06,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:06,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:01:06,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:01:06,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 11:01:06,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:06,469 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:01:06,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:01:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:06,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:06,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:06,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:01:06,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:06,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 11:01:06,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:06,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:01:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:01:06,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:01:06,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:06,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:01:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:06,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:06,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:06,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 11:01:06,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:06,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 11:01:06,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:06,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:06,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:01:06,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:01:06,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 11:01:06,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:06,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 11:01:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:06,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:06,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:06,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 11:01:06,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:06,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 11:01:06,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:06,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:06,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:01:06,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 11:01:06,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:01:06,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:06,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 11:01:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:06,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:06,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:06,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 11:01:06,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:06,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 11:01:06,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:06,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:06,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:01:06,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 11:01:06,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:01:06,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 49 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 11:01:07,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882644036] [2020-10-28 11:01:07,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:01:07,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:01:07,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900683319] [2020-10-28 11:01:07,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:01:07,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:01:07,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:01:07,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:01:07,764 INFO L87 Difference]: Start difference. First operand 53156 states and 80413 transitions. Second operand 7 states. [2020-10-28 11:01:08,051 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 11:01:09,799 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 11:01:29,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:01:29,255 INFO L93 Difference]: Finished difference Result 133133 states and 203485 transitions. [2020-10-28 11:01:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 11:01:29,257 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1019 [2020-10-28 11:01:29,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:01:29,618 INFO L225 Difference]: With dead ends: 133133 [2020-10-28 11:01:29,618 INFO L226 Difference]: Without dead ends: 79983 [2020-10-28 11:01:29,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 11:01:29,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79983 states. [2020-10-28 11:01:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79983 to 79654. [2020-10-28 11:01:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79654 states. [2020-10-28 11:01:33,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79654 states to 79654 states and 121637 transitions. [2020-10-28 11:01:33,166 INFO L78 Accepts]: Start accepts. Automaton has 79654 states and 121637 transitions. Word has length 1019 [2020-10-28 11:01:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:01:33,167 INFO L481 AbstractCegarLoop]: Abstraction has 79654 states and 121637 transitions. [2020-10-28 11:01:33,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:01:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 79654 states and 121637 transitions. [2020-10-28 11:01:33,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1032 [2020-10-28 11:01:33,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:01:33,405 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 11:01:33,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 11:01:33,405 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:01:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:01:33,406 INFO L82 PathProgramCache]: Analyzing trace with hash 772385219, now seen corresponding path program 1 times [2020-10-28 11:01:33,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:01:33,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399528872] [2020-10-28 11:01:33,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:01:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:33,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:35,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:38,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:38,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1051 [2020-10-28 11:01:38,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:01:38,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5211 [2020-10-28 11:01:38,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:38,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:38,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:01:38,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:01:38,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 11:01:38,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:39,309 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:01:39,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:01:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:39,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:39,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:39,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:01:39,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:39,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 11:01:39,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:39,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:39,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:01:39,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:01:39,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:01:39,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:39,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:01:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:39,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:39,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:39,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 11:01:39,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:39,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 11:01:39,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:39,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:39,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:01:39,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:01:39,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 11:01:39,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:01:40,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399528872] [2020-10-28 11:01:40,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:01:40,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:01:40,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588969599] [2020-10-28 11:01:40,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:01:40,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:01:40,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:01:40,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:01:40,511 INFO L87 Difference]: Start difference. First operand 79654 states and 121637 transitions. Second operand 7 states. [2020-10-28 11:01:40,829 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 11:01:42,867 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 167