/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/array-examples/standard_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:54:52,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:54:52,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:54:52,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:54:52,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:54:52,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:54:52,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:54:52,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:54:52,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:54:52,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:54:52,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:54:52,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:54:52,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:54:52,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:54:52,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:54:52,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:54:52,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:54:52,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:54:52,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:54:52,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:54:52,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:54:52,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:54:52,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:54:52,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:54:52,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:54:52,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:54:52,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:54:52,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:54:52,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:54:52,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:54:52,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:54:52,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:54:52,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:54:52,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:54:52,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:54:52,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:54:52,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:54:52,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:54:52,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:54:52,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:54:52,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:54:52,296 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 08:54:52,323 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:54:52,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:54:52,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:54:52,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:54:52,326 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:54:52,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:54:52,326 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:54:52,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:54:52,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:54:52,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:54:52,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:54:52,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:54:52,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:54:52,328 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:54:52,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:54:52,328 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:54:52,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:54:52,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:54:52,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:54:52,329 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:54:52,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:54:52,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:54:52,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:54:52,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:54:52,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:54:52,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:54:52,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:54:52,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:54:52,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:54:52,331 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:54:52,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:54:52,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:54:52,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:54:52,739 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:54:52,740 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:54:52,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2020-10-28 08:54:52,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/849de0dc7/c46903c8e3fa4a3cb909fffed5d8e230/FLAGacd776d46 [2020-10-28 08:54:53,464 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:54:53,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2020-10-28 08:54:53,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/849de0dc7/c46903c8e3fa4a3cb909fffed5d8e230/FLAGacd776d46 [2020-10-28 08:54:53,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/849de0dc7/c46903c8e3fa4a3cb909fffed5d8e230 [2020-10-28 08:54:53,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:54:53,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:54:53,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:54:53,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:54:53,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:54:53,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:54:53" (1/1) ... [2020-10-28 08:54:53,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13136ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:53, skipping insertion in model container [2020-10-28 08:54:53,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:54:53" (1/1) ... [2020-10-28 08:54:53,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:54:53,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:54:54,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:54:54,142 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:54:54,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:54:54,189 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:54:54,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:54 WrapperNode [2020-10-28 08:54:54,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:54:54,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:54:54,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:54:54,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:54:54,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:54" (1/1) ... [2020-10-28 08:54:54,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:54" (1/1) ... [2020-10-28 08:54:54,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:54" (1/1) ... [2020-10-28 08:54:54,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:54" (1/1) ... [2020-10-28 08:54:54,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:54" (1/1) ... [2020-10-28 08:54:54,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:54" (1/1) ... [2020-10-28 08:54:54,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:54" (1/1) ... [2020-10-28 08:54:54,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:54:54,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:54:54,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:54:54,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:54:54,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:54" (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 08:54:54,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:54:54,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:54:54,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:54:54,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:54:54,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:54:54,339 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:54:54,339 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:54:54,339 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:54:54,339 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:54:54,339 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:54:54,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:54:54,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:54:54,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:54:54,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:54:54,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:54:54,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:54:54,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:54:54,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:54:54,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:54:54,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:54:55,075 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:54:55,076 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-28 08:54:55,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:54:55 BoogieIcfgContainer [2020-10-28 08:54:55,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:54:55,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:54:55,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:54:55,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:54:55,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:54:53" (1/3) ... [2020-10-28 08:54:55,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6852d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:54:55, skipping insertion in model container [2020-10-28 08:54:55,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:54" (2/3) ... [2020-10-28 08:54:55,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6852d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:54:55, skipping insertion in model container [2020-10-28 08:54:55,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:54:55" (3/3) ... [2020-10-28 08:54:55,093 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2020-10-28 08:54:55,107 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:54:55,113 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:54:55,130 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:54:55,172 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:54:55,172 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:54:55,172 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:54:55,172 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:54:55,172 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:54:55,173 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:54:55,173 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:54:55,173 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:54:55,194 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-28 08:54:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 08:54:55,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:55,205 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] [2020-10-28 08:54:55,205 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:55,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:55,215 INFO L82 PathProgramCache]: Analyzing trace with hash 235794212, now seen corresponding path program 1 times [2020-10-28 08:54:55,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:55,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843598294] [2020-10-28 08:54:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:55,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:55,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:55,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:55,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:55,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:55,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:56,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:56,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 08:54:56,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:54:56,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-28 08:54:56,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:56,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:56,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:56,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 08:54:56,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:56,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:54:56,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:56,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:56,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:56,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:56,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:56,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:54:56,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:56,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:56,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:56,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:56,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:56,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:56,589 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 08:54:56,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843598294] [2020-10-28 08:54:56,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:54:56,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:54:56,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666892944] [2020-10-28 08:54:56,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:54:56,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:56,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:54:56,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:54:56,617 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-10-28 08:54:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:56,751 INFO L93 Difference]: Finished difference Result 77 states and 107 transitions. [2020-10-28 08:54:56,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:54:56,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-28 08:54:56,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:56,761 INFO L225 Difference]: With dead ends: 77 [2020-10-28 08:54:56,761 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 08:54:56,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:54:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 08:54:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-28 08:54:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 08:54:56,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 08:54:56,806 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2020-10-28 08:54:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:56,807 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 08:54:56,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:54:56,807 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 08:54:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 08:54:56,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:56,809 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] [2020-10-28 08:54:56,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:54:56,809 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:56,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:56,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1022358290, now seen corresponding path program 1 times [2020-10-28 08:54:56,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:56,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670369294] [2020-10-28 08:54:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:56,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:56,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:56,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:56,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:56,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:56,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:58,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 08:54:58,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:54:58,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1797 [2020-10-28 08:54:58,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:58,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:58,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:54:58,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:54:58,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:54:58,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:54:58,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:58,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:58,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:58,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:58,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:54:58,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:58,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:58,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:58,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:58,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:54:58,703 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 08:54:58,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670369294] [2020-10-28 08:54:58,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:54:58,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:54:58,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673149969] [2020-10-28 08:54:58,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:54:58,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:58,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:54:58,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:54:58,708 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 4 states. [2020-10-28 08:54:58,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:58,845 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-10-28 08:54:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:54:58,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-28 08:54:58,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:58,847 INFO L225 Difference]: With dead ends: 71 [2020-10-28 08:54:58,847 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 08:54:58,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:54:58,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 08:54:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-28 08:54:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 08:54:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-28 08:54:58,859 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 25 [2020-10-28 08:54:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:58,862 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-28 08:54:58,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:54:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-28 08:54:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 08:54:58,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:58,864 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] [2020-10-28 08:54:58,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:54:58,865 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:58,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1644726824, now seen corresponding path program 1 times [2020-10-28 08:54:58,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:58,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077574521] [2020-10-28 08:54:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:58,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:59,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:03,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:03,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 08:55:03,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:03,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 08:55:03,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:03,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:03,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:55:03,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:55:03,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:55:03,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:03,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:03,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:03,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:03,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:03,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:03,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:03,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:03,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:03,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:03,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:03,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:03,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:55:03,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077574521] [2020-10-28 08:55:03,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:03,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:55:03,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136601595] [2020-10-28 08:55:03,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:55:03,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:03,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:55:03,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:03,980 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 5 states. [2020-10-28 08:55:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:04,196 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-10-28 08:55:04,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:55:04,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-28 08:55:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:04,199 INFO L225 Difference]: With dead ends: 85 [2020-10-28 08:55:04,199 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 08:55:04,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 08:55:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-10-28 08:55:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 08:55:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-28 08:55:04,220 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 35 [2020-10-28 08:55:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:04,220 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-28 08:55:04,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:55:04,221 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-28 08:55:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:55:04,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:04,222 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:55:04,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:55:04,223 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:04,224 INFO L82 PathProgramCache]: Analyzing trace with hash -576553538, now seen corresponding path program 2 times [2020-10-28 08:55:04,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:04,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847562407] [2020-10-28 08:55:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:04,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:04,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:04,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:04,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:04,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:05,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:09,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:09,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:55:09,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:09,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 08:55:09,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:09,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:09,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:55:09,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:09,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:55:09,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-28 08:55:09,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:09,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:09,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:09,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:09,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:09,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:55:09,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:09,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:09,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:09,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:09,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:09,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 08:55:09,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847562407] [2020-10-28 08:55:09,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:55:09,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:55:09,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086957998] [2020-10-28 08:55:09,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:55:09,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:09,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:55:09,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:09,355 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 4 states. [2020-10-28 08:55:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:09,493 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-10-28 08:55:09,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:55:09,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-28 08:55:09,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:09,494 INFO L225 Difference]: With dead ends: 96 [2020-10-28 08:55:09,495 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 08:55:09,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 08:55:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-28 08:55:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 08:55:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-28 08:55:09,512 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 45 [2020-10-28 08:55:09,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:09,513 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-28 08:55:09,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:55:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-28 08:55:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 08:55:09,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:09,518 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:55:09,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:55:09,518 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:09,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:09,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2065008412, now seen corresponding path program 1 times [2020-10-28 08:55:09,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:09,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453732202] [2020-10-28 08:55:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:09,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:09,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:09,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:09,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:09,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:10,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:14,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:14,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 08:55:14,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:14,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:55:14,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:14,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:14,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:55:14,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:55:14,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:55:14,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:14,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:14,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:14,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:14,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:14,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:14,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:55:14,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:14,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:14,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:14,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:14,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:14,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 08:55:14,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453732202] [2020-10-28 08:55:14,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:14,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:55:14,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019243040] [2020-10-28 08:55:14,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:55:14,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:14,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:55:14,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:14,626 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 6 states. [2020-10-28 08:55:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:14,843 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2020-10-28 08:55:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:55:14,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-28 08:55:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:14,845 INFO L225 Difference]: With dead ends: 104 [2020-10-28 08:55:14,845 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 08:55:14,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 08:55:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2020-10-28 08:55:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 08:55:14,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-10-28 08:55:14,863 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 47 [2020-10-28 08:55:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:14,864 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-10-28 08:55:14,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:55:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-10-28 08:55:14,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 08:55:14,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:14,868 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 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 08:55:14,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:55:14,869 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:14,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:14,871 INFO L82 PathProgramCache]: Analyzing trace with hash -741238350, now seen corresponding path program 2 times [2020-10-28 08:55:14,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:14,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058190665] [2020-10-28 08:55:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:14,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:14,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:14,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:14,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:15,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:19,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:19,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 08:55:19,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:19,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 08:55:19,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:19,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:19,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:55:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:19,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:55:19,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:19,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:19,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:19,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:19,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:19,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:19,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:19,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:19,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:19,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:19,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:19,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:19,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-28 08:55:19,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058190665] [2020-10-28 08:55:19,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:19,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:55:19,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022822028] [2020-10-28 08:55:19,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:55:19,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:55:19,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:19,991 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 5 states. [2020-10-28 08:55:20,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:20,121 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2020-10-28 08:55:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:55:20,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-28 08:55:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:20,124 INFO L225 Difference]: With dead ends: 118 [2020-10-28 08:55:20,126 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 08:55:20,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 08:55:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-28 08:55:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 08:55:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-28 08:55:20,145 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 57 [2020-10-28 08:55:20,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:20,145 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-28 08:55:20,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:55:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-28 08:55:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 08:55:20,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:20,153 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 08:55:20,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:55:20,153 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:20,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:20,154 INFO L82 PathProgramCache]: Analyzing trace with hash 203130384, now seen corresponding path program 3 times [2020-10-28 08:55:20,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:20,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332877759] [2020-10-28 08:55:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:20,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:20,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:20,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:20,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:20,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:25,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:25,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 08:55:25,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:25,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 08:55:25,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:25,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:55:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:55:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:55:25,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:25,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:25,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:25,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:25,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:25,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:25,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:55:25,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:25,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:25,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:25,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:25,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:25,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 08:55:25,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332877759] [2020-10-28 08:55:25,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:25,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:55:25,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236710005] [2020-10-28 08:55:25,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:55:25,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:55:25,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:25,345 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 7 states. [2020-10-28 08:55:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:25,574 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2020-10-28 08:55:25,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:55:25,574 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-28 08:55:25,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:25,576 INFO L225 Difference]: With dead ends: 124 [2020-10-28 08:55:25,576 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 08:55:25,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 08:55:25,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2020-10-28 08:55:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 08:55:25,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-10-28 08:55:25,590 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 59 [2020-10-28 08:55:25,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:25,590 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-10-28 08:55:25,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:55:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-10-28 08:55:25,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 08:55:25,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:25,595 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-28 08:55:25,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:55:25,596 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:25,598 INFO L82 PathProgramCache]: Analyzing trace with hash -991479898, now seen corresponding path program 4 times [2020-10-28 08:55:25,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:25,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282551934] [2020-10-28 08:55:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:25,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:25,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:25,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:25,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:25,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:30,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:30,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 08:55:30,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:30,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 08:55:30,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:30,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:30,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:55:30,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:55:30,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:55:30,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:30,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:30,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:30,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:30,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:30,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:30,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:30,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:30,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:30,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-28 08:55:30,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282551934] [2020-10-28 08:55:30,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:30,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:55:30,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768057935] [2020-10-28 08:55:30,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:55:30,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:30,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:55:30,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:30,731 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 8 states. [2020-10-28 08:55:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:30,941 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2020-10-28 08:55:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:55:30,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-28 08:55:30,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:30,942 INFO L225 Difference]: With dead ends: 142 [2020-10-28 08:55:30,942 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 08:55:30,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 08:55:30,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2020-10-28 08:55:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 08:55:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-10-28 08:55:30,952 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 69 [2020-10-28 08:55:30,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:30,952 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-10-28 08:55:30,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:55:30,952 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-10-28 08:55:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:55:30,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:30,954 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-28 08:55:30,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:55:30,954 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:30,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:30,955 INFO L82 PathProgramCache]: Analyzing trace with hash 323823036, now seen corresponding path program 5 times [2020-10-28 08:55:30,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:30,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284375346] [2020-10-28 08:55:30,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:30,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:31,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:31,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:31,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:31,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:36,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:36,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:55:36,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:36,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 08:55:36,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:36,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:36,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:55:36,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:36,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:55:36,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:36,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:36,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:36,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:36,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:36,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:36,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:36,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:36,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:36,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:36,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-28 08:55:36,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284375346] [2020-10-28 08:55:36,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:36,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:55:36,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469248169] [2020-10-28 08:55:36,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:55:36,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:36,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:55:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:36,088 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 6 states. [2020-10-28 08:55:36,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:36,199 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2020-10-28 08:55:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:55:36,200 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-28 08:55:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:36,201 INFO L225 Difference]: With dead ends: 160 [2020-10-28 08:55:36,201 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 08:55:36,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:36,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 08:55:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-28 08:55:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 08:55:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2020-10-28 08:55:36,219 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 79 [2020-10-28 08:55:36,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:36,219 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2020-10-28 08:55:36,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:55:36,219 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2020-10-28 08:55:36,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:55:36,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:36,222 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 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 08:55:36,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:55:36,222 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:36,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:36,223 INFO L82 PathProgramCache]: Analyzing trace with hash -162244710, now seen corresponding path program 6 times [2020-10-28 08:55:36,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:36,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066568470] [2020-10-28 08:55:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:36,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:36,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:36,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:36,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:36,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:41,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:41,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:55:41,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:41,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:55:41,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:41,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:55:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:55:41,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:55:41,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:41,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:41,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:41,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:41,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:41,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:41,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:41,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:41,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:41,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:41,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-10-28 08:55:41,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066568470] [2020-10-28 08:55:41,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:41,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:55:41,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312777036] [2020-10-28 08:55:41,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:55:41,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:41,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:55:41,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:55:41,371 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand 9 states. [2020-10-28 08:55:41,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:41,677 INFO L93 Difference]: Finished difference Result 162 states and 177 transitions. [2020-10-28 08:55:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:55:41,678 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 81 [2020-10-28 08:55:41,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:41,679 INFO L225 Difference]: With dead ends: 162 [2020-10-28 08:55:41,679 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 08:55:41,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:55:41,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 08:55:41,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2020-10-28 08:55:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 08:55:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2020-10-28 08:55:41,697 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 81 [2020-10-28 08:55:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:41,698 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2020-10-28 08:55:41,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:55:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2020-10-28 08:55:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 08:55:41,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:41,701 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 1, 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 08:55:41,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:55:41,702 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:41,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1856283824, now seen corresponding path program 7 times [2020-10-28 08:55:41,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:41,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002410501] [2020-10-28 08:55:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:41,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:41,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:41,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:41,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:45,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:46,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:46,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:55:46,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:46,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-28 08:55:46,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:46,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:46,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:55:46,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 08:55:46,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:55:46,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:46,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:46,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:46,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:46,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:46,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:46,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:46,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:46,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:46,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:46,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-28 08:55:46,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002410501] [2020-10-28 08:55:46,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:46,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:55:46,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466694432] [2020-10-28 08:55:46,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:55:46,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:46,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:55:46,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:55:46,936 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 10 states. [2020-10-28 08:55:47,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:47,305 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2020-10-28 08:55:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:55:47,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 91 [2020-10-28 08:55:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:47,307 INFO L225 Difference]: With dead ends: 180 [2020-10-28 08:55:47,307 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 08:55:47,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:55:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 08:55:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2020-10-28 08:55:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 08:55:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-10-28 08:55:47,320 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 91 [2020-10-28 08:55:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:47,321 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-10-28 08:55:47,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:55:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-10-28 08:55:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:55:47,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:47,324 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 1, 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 08:55:47,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:55:47,324 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:47,325 INFO L82 PathProgramCache]: Analyzing trace with hash -776810938, now seen corresponding path program 8 times [2020-10-28 08:55:47,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:47,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846979764] [2020-10-28 08:55:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:47,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:47,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:47,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:47,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:47,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:52,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:52,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:55:52,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:52,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:55:52,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:52,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:52,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:55:52,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:52,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:55:52,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:52,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:52,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:52,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:52,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:52,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:52,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:55:52,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:52,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:52,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:52,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:52,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:52,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-28 08:55:52,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846979764] [2020-10-28 08:55:52,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:52,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:55:52,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840367748] [2020-10-28 08:55:52,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:55:52,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:52,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:55:52,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:52,465 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 7 states. [2020-10-28 08:55:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:52,591 INFO L93 Difference]: Finished difference Result 202 states and 214 transitions. [2020-10-28 08:55:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:55:52,592 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2020-10-28 08:55:52,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:52,593 INFO L225 Difference]: With dead ends: 202 [2020-10-28 08:55:52,593 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 08:55:52,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:52,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 08:55:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-28 08:55:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 08:55:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2020-10-28 08:55:52,606 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 101 [2020-10-28 08:55:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:52,606 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2020-10-28 08:55:52,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:55:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2020-10-28 08:55:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 08:55:52,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:52,608 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 1, 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 08:55:52,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:55:52,608 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:52,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2060592548, now seen corresponding path program 9 times [2020-10-28 08:55:52,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:52,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202200345] [2020-10-28 08:55:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:52,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:52,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:52,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:52,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:57,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:57,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:57,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 08:55:57,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:55:57,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:55:57,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:57,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:57,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:55:57,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:55:57,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:55:57,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:57,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:57,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:57,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:57,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:57,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:57,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:57,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:57,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:57,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:57,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:57,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:57,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-10-28 08:55:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-10-28 08:55:57,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202200345] [2020-10-28 08:55:57,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:57,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:55:57,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999579300] [2020-10-28 08:55:57,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:55:57,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:57,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:55:57,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:55:57,803 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand 11 states. [2020-10-28 08:55:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:58,134 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2020-10-28 08:55:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:55:58,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 103 [2020-10-28 08:55:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:58,136 INFO L225 Difference]: With dead ends: 200 [2020-10-28 08:55:58,136 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 08:55:58,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:55:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 08:55:58,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2020-10-28 08:55:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 08:55:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2020-10-28 08:55:58,142 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 103 [2020-10-28 08:55:58,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:58,143 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2020-10-28 08:55:58,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:55:58,143 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2020-10-28 08:55:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 08:55:58,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:58,144 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 1, 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 08:55:58,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:55:58,144 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:58,145 INFO L82 PathProgramCache]: Analyzing trace with hash -619352518, now seen corresponding path program 10 times [2020-10-28 08:55:58,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:58,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395438209] [2020-10-28 08:55:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:58,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:58,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:58,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:58,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:03,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:03,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 08:56:03,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:03,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 08:56:03,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:03,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:03,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:56:03,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:03,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:56:03,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:03,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:03,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:03,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:03,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:03,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:03,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:56:03,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:03,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:03,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:03,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:03,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:03,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2020-10-28 08:56:03,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395438209] [2020-10-28 08:56:03,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:03,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:56:03,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031457315] [2020-10-28 08:56:03,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:56:03,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:03,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:56:03,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:56:03,291 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 8 states. [2020-10-28 08:56:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:03,458 INFO L93 Difference]: Finished difference Result 224 states and 236 transitions. [2020-10-28 08:56:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:56:03,458 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 113 [2020-10-28 08:56:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:03,459 INFO L225 Difference]: With dead ends: 224 [2020-10-28 08:56:03,460 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 08:56:03,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:56:03,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 08:56:03,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-28 08:56:03,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 08:56:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2020-10-28 08:56:03,466 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 113 [2020-10-28 08:56:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:03,467 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2020-10-28 08:56:03,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:56:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2020-10-28 08:56:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 08:56:03,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:03,468 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 1, 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 08:56:03,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:56:03,469 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:03,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:03,469 INFO L82 PathProgramCache]: Analyzing trace with hash -385439592, now seen corresponding path program 11 times [2020-10-28 08:56:03,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:03,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907265140] [2020-10-28 08:56:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:03,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:03,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:03,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:03,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:08,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 08:56:08,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:08,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 08:56:08,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:08,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:08,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:56:08,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 08:56:08,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:56:08,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:08,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:08,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:08,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:08,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:08,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:08,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:08,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:08,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:08,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:08,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:08,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2020-10-28 08:56:08,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907265140] [2020-10-28 08:56:08,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:08,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:56:08,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141272295] [2020-10-28 08:56:08,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:56:08,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:08,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:56:08,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:56:08,677 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand 12 states. [2020-10-28 08:56:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:09,036 INFO L93 Difference]: Finished difference Result 220 states and 235 transitions. [2020-10-28 08:56:09,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:56:09,037 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 115 [2020-10-28 08:56:09,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:09,038 INFO L225 Difference]: With dead ends: 220 [2020-10-28 08:56:09,038 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 08:56:09,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:56:09,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 08:56:09,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2020-10-28 08:56:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 08:56:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2020-10-28 08:56:09,046 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 115 [2020-10-28 08:56:09,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:09,046 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2020-10-28 08:56:09,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:56:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2020-10-28 08:56:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 08:56:09,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:09,048 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 1, 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 08:56:09,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:56:09,048 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:09,049 INFO L82 PathProgramCache]: Analyzing trace with hash -705916882, now seen corresponding path program 12 times [2020-10-28 08:56:09,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:09,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849377496] [2020-10-28 08:56:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:09,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:09,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:09,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:09,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:14,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:14,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 08:56:14,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:14,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-28 08:56:14,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:14,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:14,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:56:14,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:56:14,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:56:14,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:14,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:14,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:14,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:14,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:14,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:14,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:14,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:14,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:14,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:14,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:14,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:14,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2020-10-28 08:56:14,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849377496] [2020-10-28 08:56:14,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:14,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:56:14,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012768165] [2020-10-28 08:56:14,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:56:14,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:14,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:56:14,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:56:14,315 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand 13 states. [2020-10-28 08:56:14,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:14,704 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2020-10-28 08:56:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:56:14,706 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 125 [2020-10-28 08:56:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:14,707 INFO L225 Difference]: With dead ends: 238 [2020-10-28 08:56:14,707 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 08:56:14,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:56:14,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 08:56:14,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-10-28 08:56:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-28 08:56:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 146 transitions. [2020-10-28 08:56:14,723 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 146 transitions. Word has length 125 [2020-10-28 08:56:14,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:14,723 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 146 transitions. [2020-10-28 08:56:14,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:56:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 146 transitions. [2020-10-28 08:56:14,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-28 08:56:14,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:14,728 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 1, 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 08:56:14,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:56:14,728 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:14,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:14,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1703490628, now seen corresponding path program 13 times [2020-10-28 08:56:14,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:14,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218317603] [2020-10-28 08:56:14,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:14,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:14,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:14,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:14,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:19,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 08:56:19,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:19,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 08:56:19,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:19,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:19,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:56:19,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:19,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:56:19,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:19,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:19,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:19,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:19,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:19,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:19,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:19,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:19,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:19,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:19,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:19,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2020-10-28 08:56:19,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218317603] [2020-10-28 08:56:19,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:19,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:56:19,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377730554] [2020-10-28 08:56:19,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:56:19,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:19,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:56:19,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:19,891 INFO L87 Difference]: Start difference. First operand 140 states and 146 transitions. Second operand 9 states. [2020-10-28 08:56:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:20,012 INFO L93 Difference]: Finished difference Result 266 states and 278 transitions. [2020-10-28 08:56:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:56:20,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-10-28 08:56:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:20,014 INFO L225 Difference]: With dead ends: 266 [2020-10-28 08:56:20,014 INFO L226 Difference]: Without dead ends: 143 [2020-10-28 08:56:20,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-28 08:56:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-28 08:56:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 08:56:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2020-10-28 08:56:20,023 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 135 [2020-10-28 08:56:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:20,023 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2020-10-28 08:56:20,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:56:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2020-10-28 08:56:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 08:56:20,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:20,032 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 1, 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 08:56:20,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:56:20,032 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:20,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1940468770, now seen corresponding path program 14 times [2020-10-28 08:56:20,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:20,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926194432] [2020-10-28 08:56:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:20,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:20,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:20,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:20,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:25,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:25,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-28 08:56:25,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:25,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-28 08:56:25,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:25,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:25,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:56:25,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:56:25,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:56:25,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:25,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:25,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:25,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:25,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:25,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:25,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:56:25,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:25,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:25,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:25,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:25,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:25,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2020-10-28 08:56:25,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926194432] [2020-10-28 08:56:25,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:25,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:56:25,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777784791] [2020-10-28 08:56:25,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:56:25,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:25,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:56:25,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:56:25,345 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand 14 states. [2020-10-28 08:56:25,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:25,764 INFO L93 Difference]: Finished difference Result 258 states and 273 transitions. [2020-10-28 08:56:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:56:25,765 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 137 [2020-10-28 08:56:25,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:25,767 INFO L225 Difference]: With dead ends: 258 [2020-10-28 08:56:25,767 INFO L226 Difference]: Without dead ends: 157 [2020-10-28 08:56:25,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:56:25,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-28 08:56:25,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 152. [2020-10-28 08:56:25,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 08:56:25,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 158 transitions. [2020-10-28 08:56:25,775 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 158 transitions. Word has length 137 [2020-10-28 08:56:25,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:25,775 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 158 transitions. [2020-10-28 08:56:25,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:56:25,775 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 158 transitions. [2020-10-28 08:56:25,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-28 08:56:25,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:25,777 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 1, 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 08:56:25,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:56:25,778 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:25,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:25,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1333577928, now seen corresponding path program 15 times [2020-10-28 08:56:25,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:25,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163922102] [2020-10-28 08:56:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:25,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:25,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:25,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:25,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:30,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:30,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-28 08:56:30,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:30,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 08:56:30,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:30,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:30,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:56:30,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:30,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:56:30,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:30,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:30,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:30,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:30,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:30,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:30,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:56:30,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:30,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:30,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:30,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:30,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:30,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-10-28 08:56:30,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163922102] [2020-10-28 08:56:30,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:30,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:56:30,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466928367] [2020-10-28 08:56:30,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:56:30,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:30,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:56:30,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:30,949 INFO L87 Difference]: Start difference. First operand 152 states and 158 transitions. Second operand 10 states. [2020-10-28 08:56:31,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:31,102 INFO L93 Difference]: Finished difference Result 288 states and 300 transitions. [2020-10-28 08:56:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:56:31,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 147 [2020-10-28 08:56:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:31,104 INFO L225 Difference]: With dead ends: 288 [2020-10-28 08:56:31,104 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 08:56:31,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 08:56:31,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-10-28 08:56:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 08:56:31,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2020-10-28 08:56:31,111 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 147 [2020-10-28 08:56:31,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:31,111 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2020-10-28 08:56:31,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:56:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2020-10-28 08:56:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 08:56:31,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:31,112 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 1, 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 08:56:31,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:56:31,113 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash -516138474, now seen corresponding path program 16 times [2020-10-28 08:56:31,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:31,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574135713] [2020-10-28 08:56:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:31,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:31,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:31,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:31,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:36,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:36,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 08:56:36,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:36,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-28 08:56:36,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:36,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:36,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:56:36,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:56:36,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:56:36,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:36,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:36,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:36,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:36,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:36,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:36,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:36,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:36,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:36,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:36,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:36,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:36,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-10-28 08:56:36,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574135713] [2020-10-28 08:56:36,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:36,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:56:36,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139758701] [2020-10-28 08:56:36,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:56:36,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:36,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:56:36,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:56:36,428 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand 15 states. [2020-10-28 08:56:36,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:36,907 INFO L93 Difference]: Finished difference Result 278 states and 293 transitions. [2020-10-28 08:56:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:56:36,908 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 149 [2020-10-28 08:56:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:36,910 INFO L225 Difference]: With dead ends: 278 [2020-10-28 08:56:36,910 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 08:56:36,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:56:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 08:56:36,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2020-10-28 08:56:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-28 08:56:36,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 170 transitions. [2020-10-28 08:56:36,918 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 170 transitions. Word has length 149 [2020-10-28 08:56:36,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:36,918 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 170 transitions. [2020-10-28 08:56:36,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:56:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 170 transitions. [2020-10-28 08:56:36,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-28 08:56:36,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:36,920 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 7, 7, 1, 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 08:56:36,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:56:36,920 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:36,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1486799828, now seen corresponding path program 17 times [2020-10-28 08:56:36,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:36,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186466613] [2020-10-28 08:56:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:36,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:37,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:37,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:37,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:42,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:42,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-28 08:56:42,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:42,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5095 [2020-10-28 08:56:42,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:42,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:42,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:56:42,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 08:56:42,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:56:42,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:42,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:42,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:42,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:42,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:42,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:42,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:42,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:42,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:42,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-28 08:56:42,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186466613] [2020-10-28 08:56:42,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:42,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:56:42,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790198506] [2020-10-28 08:56:42,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:56:42,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:42,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:56:42,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:56:42,279 INFO L87 Difference]: Start difference. First operand 164 states and 170 transitions. Second operand 16 states. [2020-10-28 08:56:42,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:42,678 INFO L93 Difference]: Finished difference Result 296 states and 311 transitions. [2020-10-28 08:56:42,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:56:42,679 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2020-10-28 08:56:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:42,681 INFO L225 Difference]: With dead ends: 296 [2020-10-28 08:56:42,682 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 08:56:42,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:56:42,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 08:56:42,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2020-10-28 08:56:42,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 08:56:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 180 transitions. [2020-10-28 08:56:42,692 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 180 transitions. Word has length 159 [2020-10-28 08:56:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:42,693 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 180 transitions. [2020-10-28 08:56:42,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:56:42,693 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 180 transitions. [2020-10-28 08:56:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-28 08:56:42,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:42,694 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 7, 7, 1, 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 08:56:42,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:56:42,695 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:42,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:42,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1979860286, now seen corresponding path program 18 times [2020-10-28 08:56:42,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:42,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842396036] [2020-10-28 08:56:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:42,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:42,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:42,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:42,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:47,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 08:56:47,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:47,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-28 08:56:47,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:47,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:56:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:47,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:56:47,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:47,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:47,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:47,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:47,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:47,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:47,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:47,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:47,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:47,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:47,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:47,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2020-10-28 08:56:47,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842396036] [2020-10-28 08:56:47,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:47,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:56:47,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244875152] [2020-10-28 08:56:47,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:56:47,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:47,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:56:47,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:56:47,936 INFO L87 Difference]: Start difference. First operand 174 states and 180 transitions. Second operand 11 states. [2020-10-28 08:56:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:48,118 INFO L93 Difference]: Finished difference Result 330 states and 342 transitions. [2020-10-28 08:56:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:56:48,119 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 169 [2020-10-28 08:56:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:48,121 INFO L225 Difference]: With dead ends: 330 [2020-10-28 08:56:48,121 INFO L226 Difference]: Without dead ends: 177 [2020-10-28 08:56:48,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:56:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-28 08:56:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2020-10-28 08:56:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-28 08:56:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 182 transitions. [2020-10-28 08:56:48,131 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 182 transitions. Word has length 169 [2020-10-28 08:56:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:48,131 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 182 transitions. [2020-10-28 08:56:48,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:56:48,131 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 182 transitions. [2020-10-28 08:56:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-28 08:56:48,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:48,141 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 1, 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 08:56:48,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:56:48,142 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:48,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:48,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1733575456, now seen corresponding path program 19 times [2020-10-28 08:56:48,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:48,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639882975] [2020-10-28 08:56:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:48,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:48,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:48,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:48,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:53,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:53,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-28 08:56:53,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:53,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-10-28 08:56:53,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:53,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:56:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 08:56:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:56:53,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:53,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:53,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:53,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:53,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:53,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:53,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:53,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:53,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:53,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:53,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:53,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:53,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 740 trivial. 0 not checked. [2020-10-28 08:56:53,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639882975] [2020-10-28 08:56:53,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:53,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:56:53,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683410769] [2020-10-28 08:56:53,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:56:53,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:53,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:56:53,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:56:53,559 INFO L87 Difference]: Start difference. First operand 176 states and 182 transitions. Second operand 17 states. [2020-10-28 08:56:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:54,099 INFO L93 Difference]: Finished difference Result 316 states and 331 transitions. [2020-10-28 08:56:54,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:56:54,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2020-10-28 08:56:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:54,101 INFO L225 Difference]: With dead ends: 316 [2020-10-28 08:56:54,101 INFO L226 Difference]: Without dead ends: 191 [2020-10-28 08:56:54,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:56:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-28 08:56:54,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 186. [2020-10-28 08:56:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 08:56:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 192 transitions. [2020-10-28 08:56:54,113 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 192 transitions. Word has length 171 [2020-10-28 08:56:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:54,113 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 192 transitions. [2020-10-28 08:56:54,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:56:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 192 transitions. [2020-10-28 08:56:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-28 08:56:54,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:54,115 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 1, 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 08:56:54,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:56:54,115 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:54,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:54,116 INFO L82 PathProgramCache]: Analyzing trace with hash -316251978, now seen corresponding path program 20 times [2020-10-28 08:56:54,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:54,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060645026] [2020-10-28 08:56:54,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:54,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:54,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:54,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:54,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:59,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:59,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-28 08:56:59,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:56:59,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-28 08:56:59,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:59,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:56:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:56:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:56:59,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:59,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:59,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:59,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:59,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:59,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:59,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:56:59,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:59,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:59,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2020-10-28 08:56:59,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060645026] [2020-10-28 08:56:59,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:59,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:56:59,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094123979] [2020-10-28 08:56:59,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:56:59,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:59,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:56:59,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:56:59,545 INFO L87 Difference]: Start difference. First operand 186 states and 192 transitions. Second operand 18 states. [2020-10-28 08:57:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:00,130 INFO L93 Difference]: Finished difference Result 334 states and 349 transitions. [2020-10-28 08:57:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:57:00,130 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 181 [2020-10-28 08:57:00,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:00,133 INFO L225 Difference]: With dead ends: 334 [2020-10-28 08:57:00,133 INFO L226 Difference]: Without dead ends: 201 [2020-10-28 08:57:00,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:57:00,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-28 08:57:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 196. [2020-10-28 08:57:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-28 08:57:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 202 transitions. [2020-10-28 08:57:00,143 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 202 transitions. Word has length 181 [2020-10-28 08:57:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:00,143 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 202 transitions. [2020-10-28 08:57:00,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:57:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 202 transitions. [2020-10-28 08:57:00,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-28 08:57:00,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:00,145 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 8, 8, 1, 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 08:57:00,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:57:00,145 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:00,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1572095284, now seen corresponding path program 21 times [2020-10-28 08:57:00,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:00,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092975019] [2020-10-28 08:57:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:00,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:00,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:00,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:00,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:05,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:05,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 08:57:05,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:05,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-28 08:57:05,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:05,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:05,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:57:05,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:05,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:57:05,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:05,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:05,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:05,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:05,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:05,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:05,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:05,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:05,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:05,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:05,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:05,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:05,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2020-10-28 08:57:05,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092975019] [2020-10-28 08:57:05,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:05,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:57:05,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095116108] [2020-10-28 08:57:05,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:57:05,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:05,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:57:05,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:57:05,418 INFO L87 Difference]: Start difference. First operand 196 states and 202 transitions. Second operand 12 states. [2020-10-28 08:57:05,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:05,594 INFO L93 Difference]: Finished difference Result 372 states and 384 transitions. [2020-10-28 08:57:05,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:57:05,594 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 191 [2020-10-28 08:57:05,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:05,596 INFO L225 Difference]: With dead ends: 372 [2020-10-28 08:57:05,596 INFO L226 Difference]: Without dead ends: 199 [2020-10-28 08:57:05,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:57:05,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-28 08:57:05,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2020-10-28 08:57:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-28 08:57:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 204 transitions. [2020-10-28 08:57:05,606 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 204 transitions. Word has length 191 [2020-10-28 08:57:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:05,606 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 204 transitions. [2020-10-28 08:57:05,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:57:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 204 transitions. [2020-10-28 08:57:05,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-28 08:57:05,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:05,608 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 1, 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 08:57:05,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:57:05,608 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash -759002966, now seen corresponding path program 22 times [2020-10-28 08:57:05,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:05,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271058260] [2020-10-28 08:57:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:05,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:05,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:05,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:05,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:10,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:10,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-28 08:57:10,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:10,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-28 08:57:10,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:10,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:10,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:57:10,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 08:57:10,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:57:10,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:11,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:11,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:11,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:11,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:11,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:11,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:11,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:11,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:11,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:11,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:11,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2020-10-28 08:57:11,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271058260] [2020-10-28 08:57:11,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:11,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:57:11,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639079047] [2020-10-28 08:57:11,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:57:11,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:11,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:57:11,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:57:11,089 INFO L87 Difference]: Start difference. First operand 198 states and 204 transitions. Second operand 19 states. [2020-10-28 08:57:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:11,645 INFO L93 Difference]: Finished difference Result 354 states and 369 transitions. [2020-10-28 08:57:11,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:57:11,646 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 193 [2020-10-28 08:57:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:11,648 INFO L225 Difference]: With dead ends: 354 [2020-10-28 08:57:11,648 INFO L226 Difference]: Without dead ends: 213 [2020-10-28 08:57:11,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:57:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-28 08:57:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2020-10-28 08:57:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 08:57:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 214 transitions. [2020-10-28 08:57:11,658 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 214 transitions. Word has length 193 [2020-10-28 08:57:11,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:11,658 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 214 transitions. [2020-10-28 08:57:11,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:57:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 214 transitions. [2020-10-28 08:57:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-28 08:57:11,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:11,660 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 1, 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 08:57:11,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:57:11,660 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:11,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:11,661 INFO L82 PathProgramCache]: Analyzing trace with hash -495435328, now seen corresponding path program 23 times [2020-10-28 08:57:11,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:11,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257266664] [2020-10-28 08:57:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:11,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:16,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:16,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-28 08:57:16,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:16,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-28 08:57:16,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:16,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:57:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:57:16,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:16,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:16,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:16,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:16,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:16,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:16,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:16,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:16,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:16,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:16,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:16,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:16,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1280 trivial. 0 not checked. [2020-10-28 08:57:16,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257266664] [2020-10-28 08:57:16,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:16,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:57:16,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145736174] [2020-10-28 08:57:16,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:57:16,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:16,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:57:16,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:57:16,976 INFO L87 Difference]: Start difference. First operand 208 states and 214 transitions. Second operand 13 states. [2020-10-28 08:57:17,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:17,170 INFO L93 Difference]: Finished difference Result 394 states and 406 transitions. [2020-10-28 08:57:17,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:57:17,170 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 203 [2020-10-28 08:57:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:17,172 INFO L225 Difference]: With dead ends: 394 [2020-10-28 08:57:17,172 INFO L226 Difference]: Without dead ends: 211 [2020-10-28 08:57:17,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:57:17,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-28 08:57:17,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2020-10-28 08:57:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-28 08:57:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 216 transitions. [2020-10-28 08:57:17,182 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 216 transitions. Word has length 203 [2020-10-28 08:57:17,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:17,182 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 216 transitions. [2020-10-28 08:57:17,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:57:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 216 transitions. [2020-10-28 08:57:17,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-28 08:57:17,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:17,184 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 1, 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 08:57:17,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:57:17,185 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:17,185 INFO L82 PathProgramCache]: Analyzing trace with hash -742182242, now seen corresponding path program 24 times [2020-10-28 08:57:17,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:17,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086912010] [2020-10-28 08:57:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:17,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:17,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:17,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:17,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:22,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:22,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-28 08:57:22,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:22,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-28 08:57:22,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:22,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:22,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:57:22,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-28 08:57:22,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:57:22,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:22,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:22,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:22,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:22,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:22,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:22,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:57:22,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:22,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:22,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:22,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:22,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:22,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1124 trivial. 0 not checked. [2020-10-28 08:57:22,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086912010] [2020-10-28 08:57:22,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:22,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:57:22,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841618662] [2020-10-28 08:57:22,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:57:22,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:22,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:57:22,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:57:22,644 INFO L87 Difference]: Start difference. First operand 210 states and 216 transitions. Second operand 20 states. [2020-10-28 08:57:23,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:23,287 INFO L93 Difference]: Finished difference Result 374 states and 389 transitions. [2020-10-28 08:57:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:57:23,287 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 205 [2020-10-28 08:57:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:23,290 INFO L225 Difference]: With dead ends: 374 [2020-10-28 08:57:23,290 INFO L226 Difference]: Without dead ends: 225 [2020-10-28 08:57:23,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:57:23,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-28 08:57:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 220. [2020-10-28 08:57:23,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-28 08:57:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 226 transitions. [2020-10-28 08:57:23,300 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 226 transitions. Word has length 205 [2020-10-28 08:57:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:23,300 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 226 transitions. [2020-10-28 08:57:23,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:57:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 226 transitions. [2020-10-28 08:57:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-28 08:57:23,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:23,302 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 1, 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 08:57:23,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:57:23,302 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:23,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:23,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1184287412, now seen corresponding path program 25 times [2020-10-28 08:57:23,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:23,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729163945] [2020-10-28 08:57:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:23,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:23,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:23,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:23,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:28,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:28,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-28 08:57:28,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:28,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-28 08:57:28,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:28,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:57:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 08:57:28,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:57:28,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:28,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:28,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:28,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:28,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:28,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:28,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:28,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:28,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:28,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:28,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:28,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:28,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1256 trivial. 0 not checked. [2020-10-28 08:57:28,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729163945] [2020-10-28 08:57:28,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:28,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:57:28,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87050957] [2020-10-28 08:57:28,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:57:28,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:28,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:57:28,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:57:28,802 INFO L87 Difference]: Start difference. First operand 220 states and 226 transitions. Second operand 21 states. [2020-10-28 08:57:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:29,419 INFO L93 Difference]: Finished difference Result 392 states and 407 transitions. [2020-10-28 08:57:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:57:29,420 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 215 [2020-10-28 08:57:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:29,422 INFO L225 Difference]: With dead ends: 392 [2020-10-28 08:57:29,423 INFO L226 Difference]: Without dead ends: 235 [2020-10-28 08:57:29,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:57:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-28 08:57:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 230. [2020-10-28 08:57:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-28 08:57:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 236 transitions. [2020-10-28 08:57:29,438 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 236 transitions. Word has length 215 [2020-10-28 08:57:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:29,438 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 236 transitions. [2020-10-28 08:57:29,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:57:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 236 transitions. [2020-10-28 08:57:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-28 08:57:29,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:29,441 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 10, 10, 1, 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 08:57:29,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:57:29,441 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:29,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:29,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1017217206, now seen corresponding path program 26 times [2020-10-28 08:57:29,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:29,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656781301] [2020-10-28 08:57:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:29,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:29,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:29,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:29,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:34,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:34,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-28 08:57:34,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:34,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:57:34,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:34,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:34,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:57:34,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:34,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:57:34,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:34,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:34,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:34,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:34,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:34,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:34,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:34,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:34,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:34,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:34,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:34,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:34,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1620 trivial. 0 not checked. [2020-10-28 08:57:34,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656781301] [2020-10-28 08:57:34,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:34,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:57:34,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888805068] [2020-10-28 08:57:34,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:57:34,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:34,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:57:34,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:57:34,694 INFO L87 Difference]: Start difference. First operand 230 states and 236 transitions. Second operand 14 states. [2020-10-28 08:57:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:34,892 INFO L93 Difference]: Finished difference Result 436 states and 448 transitions. [2020-10-28 08:57:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:57:34,892 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 225 [2020-10-28 08:57:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:34,894 INFO L225 Difference]: With dead ends: 436 [2020-10-28 08:57:34,894 INFO L226 Difference]: Without dead ends: 233 [2020-10-28 08:57:34,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:57:34,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-28 08:57:34,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-28 08:57:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-28 08:57:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 238 transitions. [2020-10-28 08:57:34,904 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 238 transitions. Word has length 225 [2020-10-28 08:57:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:34,904 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 238 transitions. [2020-10-28 08:57:34,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:57:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 238 transitions. [2020-10-28 08:57:34,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-28 08:57:34,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:34,906 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 11, 11, 1, 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 08:57:34,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:57:34,907 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:34,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:34,907 INFO L82 PathProgramCache]: Analyzing trace with hash 400053672, now seen corresponding path program 27 times [2020-10-28 08:57:34,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:34,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538596124] [2020-10-28 08:57:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:34,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:40,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:40,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-28 08:57:40,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:40,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5226 [2020-10-28 08:57:40,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:40,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:40,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:57:40,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 08:57:40,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:57:40,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:40,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:40,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:40,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:40,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:40,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:40,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:57:40,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:40,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:40,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:40,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:40,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:40,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:57:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1417 trivial. 0 not checked. [2020-10-28 08:57:40,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538596124] [2020-10-28 08:57:40,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:40,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:57:40,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136096092] [2020-10-28 08:57:40,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:57:40,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:40,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:57:40,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:57:40,721 INFO L87 Difference]: Start difference. First operand 232 states and 238 transitions. Second operand 22 states. [2020-10-28 08:57:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:41,320 INFO L93 Difference]: Finished difference Result 412 states and 427 transitions. [2020-10-28 08:57:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:57:41,321 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 227 [2020-10-28 08:57:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:41,323 INFO L225 Difference]: With dead ends: 412 [2020-10-28 08:57:41,323 INFO L226 Difference]: Without dead ends: 247 [2020-10-28 08:57:41,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:57:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-28 08:57:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 242. [2020-10-28 08:57:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-28 08:57:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 248 transitions. [2020-10-28 08:57:41,334 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 248 transitions. Word has length 227 [2020-10-28 08:57:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:41,334 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 248 transitions. [2020-10-28 08:57:41,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:57:41,334 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 248 transitions. [2020-10-28 08:57:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-28 08:57:41,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:41,336 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 1, 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 08:57:41,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:57:41,337 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash -127358658, now seen corresponding path program 28 times [2020-10-28 08:57:41,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:41,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016325947] [2020-10-28 08:57:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:41,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:41,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:41,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:41,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:46,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:46,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-28 08:57:46,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:46,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5319 [2020-10-28 08:57:46,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:46,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:57:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:46,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:57:46,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:46,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:46,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:46,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:46,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:46,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:46,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:57:46,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:46,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:46,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:46,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:46,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:46,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:57:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2020-10-28 08:57:46,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016325947] [2020-10-28 08:57:46,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:46,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:57:46,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285395574] [2020-10-28 08:57:46,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:57:46,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:46,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:57:46,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:57:46,970 INFO L87 Difference]: Start difference. First operand 242 states and 248 transitions. Second operand 15 states. [2020-10-28 08:57:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:47,171 INFO L93 Difference]: Finished difference Result 458 states and 470 transitions. [2020-10-28 08:57:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:57:47,172 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 237 [2020-10-28 08:57:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:47,176 INFO L225 Difference]: With dead ends: 458 [2020-10-28 08:57:47,177 INFO L226 Difference]: Without dead ends: 245 [2020-10-28 08:57:47,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:57:47,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-28 08:57:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2020-10-28 08:57:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-28 08:57:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 250 transitions. [2020-10-28 08:57:47,198 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 250 transitions. Word has length 237 [2020-10-28 08:57:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:47,199 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 250 transitions. [2020-10-28 08:57:47,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:57:47,199 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 250 transitions. [2020-10-28 08:57:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-28 08:57:47,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:47,202 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 12, 1, 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 08:57:47,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:57:47,203 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:47,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2062410396, now seen corresponding path program 29 times [2020-10-28 08:57:47,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:47,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785474702] [2020-10-28 08:57:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:47,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:52,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:52,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-28 08:57:52,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:52,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5131 [2020-10-28 08:57:52,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:52,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:52,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:57:52,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:57:52,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:57:52,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:52,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:52,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:52,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:52,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:52,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:52,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:52,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:52,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:52,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:52,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:52,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:52,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1949 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1588 trivial. 0 not checked. [2020-10-28 08:57:52,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785474702] [2020-10-28 08:57:52,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:52,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:57:52,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960147666] [2020-10-28 08:57:52,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:57:52,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:52,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:57:52,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:57:52,862 INFO L87 Difference]: Start difference. First operand 244 states and 250 transitions. Second operand 23 states. [2020-10-28 08:57:53,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:53,569 INFO L93 Difference]: Finished difference Result 432 states and 447 transitions. [2020-10-28 08:57:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:57:53,570 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 239 [2020-10-28 08:57:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:53,572 INFO L225 Difference]: With dead ends: 432 [2020-10-28 08:57:53,572 INFO L226 Difference]: Without dead ends: 259 [2020-10-28 08:57:53,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:57:53,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-28 08:57:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 254. [2020-10-28 08:57:53,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-28 08:57:53,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 260 transitions. [2020-10-28 08:57:53,586 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 260 transitions. Word has length 239 [2020-10-28 08:57:53,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:53,587 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 260 transitions. [2020-10-28 08:57:53,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:57:53,587 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 260 transitions. [2020-10-28 08:57:53,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-28 08:57:53,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:53,589 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 1, 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 08:57:53,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:57:53,589 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:53,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:53,590 INFO L82 PathProgramCache]: Analyzing trace with hash -864791246, now seen corresponding path program 30 times [2020-10-28 08:57:53,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:53,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712701919] [2020-10-28 08:57:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:53,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:58,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:58,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-28 08:57:58,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:57:58,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5145 [2020-10-28 08:57:58,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:58,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:58,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:57:58,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-28 08:57:58,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:57:58,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:59,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:59,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:59,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:59,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:59,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:59,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:59,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:59,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:59,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2144 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2020-10-28 08:57:59,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712701919] [2020-10-28 08:57:59,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:59,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:57:59,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207463521] [2020-10-28 08:57:59,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:57:59,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:59,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:57:59,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:57:59,296 INFO L87 Difference]: Start difference. First operand 254 states and 260 transitions. Second operand 24 states. [2020-10-28 08:58:00,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:00,037 INFO L93 Difference]: Finished difference Result 450 states and 465 transitions. [2020-10-28 08:58:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:58:00,037 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 249 [2020-10-28 08:58:00,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:00,039 INFO L225 Difference]: With dead ends: 450 [2020-10-28 08:58:00,039 INFO L226 Difference]: Without dead ends: 269 [2020-10-28 08:58:00,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:58:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-28 08:58:00,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 264. [2020-10-28 08:58:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-28 08:58:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 270 transitions. [2020-10-28 08:58:00,056 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 270 transitions. Word has length 249 [2020-10-28 08:58:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:00,056 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 270 transitions. [2020-10-28 08:58:00,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:58:00,056 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 270 transitions. [2020-10-28 08:58:00,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-28 08:58:00,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:00,058 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 12, 12, 1, 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 08:58:00,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:58:00,062 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:00,063 INFO L82 PathProgramCache]: Analyzing trace with hash 441959496, now seen corresponding path program 31 times [2020-10-28 08:58:00,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:00,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929760438] [2020-10-28 08:58:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:00,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:00,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:00,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:00,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:05,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:05,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-28 08:58:05,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:05,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5209 [2020-10-28 08:58:05,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:05,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:58:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:58:05,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:05,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:05,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:05,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:05,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:05,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:05,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:05,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:05,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:05,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:05,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2349 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2020-10-28 08:58:05,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929760438] [2020-10-28 08:58:05,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:05,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:58:05,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783471204] [2020-10-28 08:58:05,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:58:05,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:05,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:58:05,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:58:05,579 INFO L87 Difference]: Start difference. First operand 264 states and 270 transitions. Second operand 16 states. [2020-10-28 08:58:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:05,788 INFO L93 Difference]: Finished difference Result 500 states and 512 transitions. [2020-10-28 08:58:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:58:05,788 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 259 [2020-10-28 08:58:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:05,790 INFO L225 Difference]: With dead ends: 500 [2020-10-28 08:58:05,791 INFO L226 Difference]: Without dead ends: 267 [2020-10-28 08:58:05,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:58:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-28 08:58:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2020-10-28 08:58:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-28 08:58:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 272 transitions. [2020-10-28 08:58:05,800 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 272 transitions. Word has length 259 [2020-10-28 08:58:05,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:05,800 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 272 transitions. [2020-10-28 08:58:05,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:58:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 272 transitions. [2020-10-28 08:58:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-28 08:58:05,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:05,802 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 13, 13, 1, 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 08:58:05,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:58:05,803 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:05,803 INFO L82 PathProgramCache]: Analyzing trace with hash 74613542, now seen corresponding path program 32 times [2020-10-28 08:58:05,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:05,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349370030] [2020-10-28 08:58:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:05,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:06,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:06,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:06,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:11,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:11,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-28 08:58:11,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:11,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5385 [2020-10-28 08:58:11,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:11,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:11,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:58:11,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-28 08:58:11,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:58:11,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:11,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:11,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:11,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:11,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:11,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:11,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:58:11,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:11,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:11,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:11,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:11,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:11,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1933 trivial. 0 not checked. [2020-10-28 08:58:11,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349370030] [2020-10-28 08:58:11,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:11,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:58:11,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900021974] [2020-10-28 08:58:11,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:58:11,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:11,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:58:11,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:58:11,794 INFO L87 Difference]: Start difference. First operand 266 states and 272 transitions. Second operand 25 states. [2020-10-28 08:58:12,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:12,442 INFO L93 Difference]: Finished difference Result 470 states and 485 transitions. [2020-10-28 08:58:12,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:58:12,442 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 261 [2020-10-28 08:58:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:12,444 INFO L225 Difference]: With dead ends: 470 [2020-10-28 08:58:12,444 INFO L226 Difference]: Without dead ends: 281 [2020-10-28 08:58:12,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:58:12,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-28 08:58:12,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 276. [2020-10-28 08:58:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-28 08:58:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 282 transitions. [2020-10-28 08:58:12,453 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 282 transitions. Word has length 261 [2020-10-28 08:58:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:12,454 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 282 transitions. [2020-10-28 08:58:12,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:58:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 282 transitions. [2020-10-28 08:58:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-28 08:58:12,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:12,456 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 13, 13, 1, 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 08:58:12,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:58:12,456 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:12,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1186541252, now seen corresponding path program 33 times [2020-10-28 08:58:12,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:12,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91262846] [2020-10-28 08:58:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:12,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:12,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:12,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:12,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:17,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:17,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-28 08:58:17,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:17,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5241 [2020-10-28 08:58:17,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:17,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:17,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:58:17,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-28 08:58:17,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 08:58:17,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:18,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:18,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:18,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:18,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:18,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:18,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:18,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:18,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:18,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:18,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:18,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:18,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2589 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2105 trivial. 0 not checked. [2020-10-28 08:58:18,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91262846] [2020-10-28 08:58:18,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:18,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:58:18,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447518391] [2020-10-28 08:58:18,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:58:18,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:18,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:58:18,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:58:18,374 INFO L87 Difference]: Start difference. First operand 276 states and 282 transitions. Second operand 26 states. [2020-10-28 08:58:19,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:19,072 INFO L93 Difference]: Finished difference Result 488 states and 503 transitions. [2020-10-28 08:58:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:58:19,073 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 271 [2020-10-28 08:58:19,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:19,076 INFO L225 Difference]: With dead ends: 488 [2020-10-28 08:58:19,076 INFO L226 Difference]: Without dead ends: 291 [2020-10-28 08:58:19,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:58:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-28 08:58:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 286. [2020-10-28 08:58:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-28 08:58:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 292 transitions. [2020-10-28 08:58:19,085 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 292 transitions. Word has length 271 [2020-10-28 08:58:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:19,085 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 292 transitions. [2020-10-28 08:58:19,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:58:19,085 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 292 transitions. [2020-10-28 08:58:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-28 08:58:19,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:19,087 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 13, 13, 1, 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 08:58:19,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:58:19,088 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:19,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1158396882, now seen corresponding path program 34 times [2020-10-28 08:58:19,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:19,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569912792] [2020-10-28 08:58:19,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:19,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:19,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:19,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:19,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:24,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:24,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-28 08:58:24,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:24,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5674 [2020-10-28 08:58:24,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:24,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:24,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:58:24,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:24,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:58:24,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:25,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:25,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:25,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:25,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:25,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:25,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:25,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:25,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:25,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:25,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:25,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2814 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2645 trivial. 0 not checked. [2020-10-28 08:58:25,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569912792] [2020-10-28 08:58:25,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:25,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:58:25,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320970408] [2020-10-28 08:58:25,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:58:25,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:25,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:58:25,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:58:25,100 INFO L87 Difference]: Start difference. First operand 286 states and 292 transitions. Second operand 17 states. [2020-10-28 08:58:25,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:25,313 INFO L93 Difference]: Finished difference Result 542 states and 554 transitions. [2020-10-28 08:58:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:58:25,313 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 281 [2020-10-28 08:58:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:25,315 INFO L225 Difference]: With dead ends: 542 [2020-10-28 08:58:25,315 INFO L226 Difference]: Without dead ends: 289 [2020-10-28 08:58:25,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:58:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-28 08:58:25,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2020-10-28 08:58:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-28 08:58:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 294 transitions. [2020-10-28 08:58:25,325 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 294 transitions. Word has length 281 [2020-10-28 08:58:25,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:25,325 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 294 transitions. [2020-10-28 08:58:25,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:58:25,326 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 294 transitions. [2020-10-28 08:58:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-28 08:58:25,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:25,327 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 14, 14, 1, 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 08:58:25,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:58:25,328 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:25,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:25,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1718018096, now seen corresponding path program 35 times [2020-10-28 08:58:25,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:25,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324427190] [2020-10-28 08:58:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:25,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:25,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:25,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:25,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:30,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:30,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-28 08:58:30,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:30,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5485 [2020-10-28 08:58:30,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:30,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:30,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:58:30,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 08:58:30,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 08:58:30,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:31,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:31,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:31,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:31,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:31,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:31,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:31,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:31,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:31,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:31,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:31,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:31,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2841 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-28 08:58:31,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324427190] [2020-10-28 08:58:31,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:31,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:58:31,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373598566] [2020-10-28 08:58:31,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:58:31,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:31,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:58:31,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:58:31,468 INFO L87 Difference]: Start difference. First operand 288 states and 294 transitions. Second operand 27 states. [2020-10-28 08:58:32,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:32,318 INFO L93 Difference]: Finished difference Result 508 states and 523 transitions. [2020-10-28 08:58:32,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 08:58:32,319 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 283 [2020-10-28 08:58:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:32,321 INFO L225 Difference]: With dead ends: 508 [2020-10-28 08:58:32,322 INFO L226 Difference]: Without dead ends: 303 [2020-10-28 08:58:32,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:58:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-28 08:58:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 298. [2020-10-28 08:58:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-28 08:58:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 304 transitions. [2020-10-28 08:58:32,331 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 304 transitions. Word has length 283 [2020-10-28 08:58:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:32,332 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 304 transitions. [2020-10-28 08:58:32,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 08:58:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 304 transitions. [2020-10-28 08:58:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-28 08:58:32,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:32,334 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 14, 14, 1, 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 08:58:32,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:58:32,334 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:32,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:32,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2138609210, now seen corresponding path program 36 times [2020-10-28 08:58:32,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:32,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925733044] [2020-10-28 08:58:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:32,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:32,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:32,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:32,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking...