/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/Problem19_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:10:25,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:10:25,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:10:25,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:10:25,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:10:25,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:10:25,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:10:25,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:10:25,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:10:25,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:10:25,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:10:25,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:10:25,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:10:25,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:10:25,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:10:25,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:10:25,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:10:25,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:10:25,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:10:25,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:10:25,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:10:25,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:10:25,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:10:25,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:10:25,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:10:25,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:10:25,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:10:25,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:10:25,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:10:25,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:10:25,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:10:25,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:10:25,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:10:25,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:10:25,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:10:25,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:10:25,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:10:25,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:10:25,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:10:25,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:10:25,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:10:25,287 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 14:10:25,336 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:10:25,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:10:25,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:10:25,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:10:25,342 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:10:25,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:10:25,342 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:10:25,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:10:25,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:10:25,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:10:25,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:10:25,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:10:25,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:10:25,344 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:10:25,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:10:25,345 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:10:25,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:10:25,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:10:25,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:10:25,346 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:10:25,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:10:25,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:10:25,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:10:25,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:10:25,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:10:25,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:10:25,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:10:25,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:10:25,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:10:25,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:10:25,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:10:25,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:10:25,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:10:25,818 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:10:25,818 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:10:25,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label29.c [2020-10-28 14:10:25,920 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/915489934/0e5ac6f1537740ec904a0aee5111cf10/FLAG5bf262b95 [2020-10-28 14:10:27,281 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:10:27,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label29.c [2020-10-28 14:10:27,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/915489934/0e5ac6f1537740ec904a0aee5111cf10/FLAG5bf262b95 [2020-10-28 14:10:27,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/915489934/0e5ac6f1537740ec904a0aee5111cf10 [2020-10-28 14:10:27,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:10:27,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:10:27,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:10:27,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:10:27,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:10:27,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:10:27" (1/1) ... [2020-10-28 14:10:27,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@301ec25a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:27, skipping insertion in model container [2020-10-28 14:10:27,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:10:27" (1/1) ... [2020-10-28 14:10:27,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:10:27,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:10:29,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:10:29,918 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:10:31,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:10:31,271 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:10:31,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:31 WrapperNode [2020-10-28 14:10:31,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:10:31,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:10:31,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:10:31,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:10:31,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:31" (1/1) ... [2020-10-28 14:10:31,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:31" (1/1) ... [2020-10-28 14:10:31,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:31" (1/1) ... [2020-10-28 14:10:31,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:31" (1/1) ... [2020-10-28 14:10:31,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:31" (1/1) ... [2020-10-28 14:10:31,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:31" (1/1) ... [2020-10-28 14:10:31,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:31" (1/1) ... [2020-10-28 14:10:31,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:10:31,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:10:31,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:10:31,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:10:31,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:31" (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 14:10:31,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:10:31,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:10:31,857 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:10:31,857 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:10:31,857 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:10:31,858 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:10:31,858 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:10:31,858 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:10:31,858 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:10:31,858 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:10:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:10:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:10:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:10:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:10:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:10:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:10:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:10:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:10:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:10:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:10:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:10:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:10:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:10:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:10:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:10:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:10:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:10:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:10:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:10:46,176 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:10:46,177 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:10:46,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:10:46 BoogieIcfgContainer [2020-10-28 14:10:46,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:10:46,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:10:46,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:10:46,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:10:46,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:10:27" (1/3) ... [2020-10-28 14:10:46,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ac2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:10:46, skipping insertion in model container [2020-10-28 14:10:46,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:31" (2/3) ... [2020-10-28 14:10:46,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ac2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:10:46, skipping insertion in model container [2020-10-28 14:10:46,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:10:46" (3/3) ... [2020-10-28 14:10:46,197 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label29.c [2020-10-28 14:10:46,210 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:10:46,218 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:10:46,233 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:10:46,293 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:10:46,293 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:10:46,293 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:10:46,293 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:10:46,294 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:10:46,294 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:10:46,294 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:10:46,294 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:10:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:10:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:10:46,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:10:46,373 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] [2020-10-28 14:10:46,373 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:10:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:10:46,385 INFO L82 PathProgramCache]: Analyzing trace with hash -84072859, now seen corresponding path program 1 times [2020-10-28 14:10:46,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:10:46,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508857102] [2020-10-28 14:10:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:10:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:10:46,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:47,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:10:47,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:10:47,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:10:47,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 635 [2020-10-28 14:10:47,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:10:47,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:10:47,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:10:47,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:10:47,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:10:47,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 14:10:47,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:10:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:10:47,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:47,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:10:47,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:10:47,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:10:47,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 14:10:47,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:10:47,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:10:47,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:10:47,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:10:47,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:10:47,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:10:47,541 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 14:10:47,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508857102] [2020-10-28 14:10:47,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:10:47,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:10:47,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043216052] [2020-10-28 14:10:47,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:10:47,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:10:47,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:10:47,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:10:47,570 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-28 14:11:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:11:15,454 INFO L93 Difference]: Finished difference Result 5091 states and 9567 transitions. [2020-10-28 14:11:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:11:15,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-28 14:11:15,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:11:15,511 INFO L225 Difference]: With dead ends: 5091 [2020-10-28 14:11:15,511 INFO L226 Difference]: Without dead ends: 3246 [2020-10-28 14:11:15,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:11:15,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2020-10-28 14:11:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 3179. [2020-10-28 14:11:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3179 states. [2020-10-28 14:11:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 5850 transitions. [2020-10-28 14:11:15,761 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 5850 transitions. Word has length 28 [2020-10-28 14:11:15,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:11:15,761 INFO L481 AbstractCegarLoop]: Abstraction has 3179 states and 5850 transitions. [2020-10-28 14:11:15,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:11:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 5850 transitions. [2020-10-28 14:11:15,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 14:11:15,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:11:15,767 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:11:15,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:11:15,768 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:11:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:11:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash -489703886, now seen corresponding path program 1 times [2020-10-28 14:11:15,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:11:15,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332818196] [2020-10-28 14:11:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:11:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:15,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:15,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:16,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:16,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:17,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:17,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 14:11:17,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:11:17,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1911 [2020-10-28 14:11:17,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:17,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:17,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:11:17,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 14:11:17,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:11:17,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:11:17,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:11:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:17,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:17,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:17,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:11:17,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:11:17,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:11:17,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:17,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:17,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:11:17,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:11:17,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:11:17,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:11:17,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:11:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:17,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:17,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:17,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 14:11:17,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:11:17,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-28 14:11:17,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:17,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:17,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:11:17,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-28 14:11:17,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:11:17,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:11:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:11:18,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332818196] [2020-10-28 14:11:18,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:11:18,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:11:18,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688576309] [2020-10-28 14:11:18,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:11:18,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:11:18,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:11:18,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:11:18,050 INFO L87 Difference]: Start difference. First operand 3179 states and 5850 transitions. Second operand 5 states. [2020-10-28 14:11:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:11:55,261 INFO L93 Difference]: Finished difference Result 9273 states and 17286 transitions. [2020-10-28 14:11:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:11:55,263 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-28 14:11:55,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:11:55,301 INFO L225 Difference]: With dead ends: 9273 [2020-10-28 14:11:55,301 INFO L226 Difference]: Without dead ends: 6100 [2020-10-28 14:11:55,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:11:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6100 states. [2020-10-28 14:11:55,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6100 to 6034. [2020-10-28 14:11:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6034 states. [2020-10-28 14:11:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 10314 transitions. [2020-10-28 14:11:55,519 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 10314 transitions. Word has length 99 [2020-10-28 14:11:55,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:11:55,520 INFO L481 AbstractCegarLoop]: Abstraction has 6034 states and 10314 transitions. [2020-10-28 14:11:55,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:11:55,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 10314 transitions. [2020-10-28 14:11:55,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 14:11:55,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:11:55,524 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:11:55,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:11:55,524 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:11:55,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:11:55,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1612494429, now seen corresponding path program 1 times [2020-10-28 14:11:55,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:11:55,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621891915] [2020-10-28 14:11:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:11:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:55,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:55,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:56,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:56,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 14:11:56,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:11:56,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-28 14:11:56,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:56,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:56,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:11:56,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:11:56,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 14:11:56,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:11:56,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:11:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:56,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:56,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:56,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:11:56,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:11:56,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 14:11:56,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:56,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:56,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:11:56,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:11:56,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:11:56,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:11:56,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:11:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:56,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:56,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:56,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 14:11:56,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:11:56,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-28 14:11:56,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:56,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:56,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:11:56,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:11:56,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 14:11:56,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:11:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:11:56,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621891915] [2020-10-28 14:11:56,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:11:56,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:11:56,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647004581] [2020-10-28 14:11:56,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:11:56,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:11:56,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:11:56,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:11:56,686 INFO L87 Difference]: Start difference. First operand 6034 states and 10314 transitions. Second operand 7 states. [2020-10-28 14:12:46,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:12:46,853 INFO L93 Difference]: Finished difference Result 17867 states and 31105 transitions. [2020-10-28 14:12:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:12:46,856 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2020-10-28 14:12:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:12:46,929 INFO L225 Difference]: With dead ends: 17867 [2020-10-28 14:12:46,929 INFO L226 Difference]: Without dead ends: 11839 [2020-10-28 14:12:46,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:12:46,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11839 states. [2020-10-28 14:12:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11839 to 11754. [2020-10-28 14:12:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11754 states. [2020-10-28 14:12:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11754 states to 11754 states and 19618 transitions. [2020-10-28 14:12:47,436 INFO L78 Accepts]: Start accepts. Automaton has 11754 states and 19618 transitions. Word has length 104 [2020-10-28 14:12:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:12:47,437 INFO L481 AbstractCegarLoop]: Abstraction has 11754 states and 19618 transitions. [2020-10-28 14:12:47,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:12:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 11754 states and 19618 transitions. [2020-10-28 14:12:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 14:12:47,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:12:47,453 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:12:47,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:12:47,454 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:12:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:12:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash -531957797, now seen corresponding path program 1 times [2020-10-28 14:12:47,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:12:47,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451990044] [2020-10-28 14:12:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:12:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:47,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:47,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:48,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:48,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:48,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 14:12:48,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:12:48,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1112 [2020-10-28 14:12:48,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:48,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:48,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:12:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:12:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 14:12:48,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:12:48,816 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:12:48,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:12:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:48,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:48,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:48,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:12:48,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:48,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:12:48,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:48,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:48,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:12:48,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:12:48,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:12:48,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:12:48,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:12:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:48,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:49,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:49,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 14:12:49,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:49,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-28 14:12:49,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:49,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:49,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:12:49,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:12:49,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 14:12:49,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:12:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:12:49,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451990044] [2020-10-28 14:12:49,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:12:49,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:12:49,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382055259] [2020-10-28 14:12:49,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:12:49,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:12:49,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:12:49,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:12:49,201 INFO L87 Difference]: Start difference. First operand 11754 states and 19618 transitions. Second operand 7 states. [2020-10-28 14:12:49,352 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:13:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:13:57,913 INFO L93 Difference]: Finished difference Result 32644 states and 55705 transitions. [2020-10-28 14:13:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:13:57,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-28 14:13:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:13:58,019 INFO L225 Difference]: With dead ends: 32644 [2020-10-28 14:13:58,019 INFO L226 Difference]: Without dead ends: 20896 [2020-10-28 14:13:58,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:13:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20896 states. [2020-10-28 14:13:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20896 to 20559. [2020-10-28 14:13:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20559 states. [2020-10-28 14:13:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20559 states to 20559 states and 30570 transitions. [2020-10-28 14:13:58,697 INFO L78 Accepts]: Start accepts. Automaton has 20559 states and 30570 transitions. Word has length 108 [2020-10-28 14:13:58,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:13:58,697 INFO L481 AbstractCegarLoop]: Abstraction has 20559 states and 30570 transitions. [2020-10-28 14:13:58,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:13:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 20559 states and 30570 transitions. [2020-10-28 14:13:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 14:13:58,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:13:58,709 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:13:58,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:13:58,709 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:13:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:13:58,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1158927119, now seen corresponding path program 1 times [2020-10-28 14:13:58,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:13:58,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493628080] [2020-10-28 14:13:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:13:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:58,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:59,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:59,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:59,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 14:13:59,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:13:59,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-28 14:13:59,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:59,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:59,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:13:59,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:13:59,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-28 14:13:59,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:13:59,932 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:13:59,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:13:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:59,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:59,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:59,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:13:59,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:13:59,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 14:13:59,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:59,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:59,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:13:59,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:13:59,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:13:59,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:14:00,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:14:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:00,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:00,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:00,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:00,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 14:14:00,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:14:00,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-28 14:14:00,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:00,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:00,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:14:00,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:14:00,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 14:14:00,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:14:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:14:00,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493628080] [2020-10-28 14:14:00,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:14:00,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:14:00,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933822083] [2020-10-28 14:14:00,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:14:00,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:14:00,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:14:00,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:14:00,530 INFO L87 Difference]: Start difference. First operand 20559 states and 30570 transitions. Second operand 6 states. [2020-10-28 14:14:00,725 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 66