/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/locks/test_locks_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:53:07,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:53:07,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:53:07,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:53:07,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:53:07,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:53:07,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:53:07,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:53:07,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:53:07,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:53:07,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:53:07,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:53:07,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:53:07,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:53:07,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:53:07,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:53:07,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:53:07,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:53:07,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:53:07,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:53:07,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:53:07,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:53:07,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:53:07,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:53:07,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:53:07,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:53:07,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:53:07,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:53:07,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:53:07,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:53:07,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:53:07,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:53:07,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:53:07,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:53:07,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:53:07,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:53:07,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:53:07,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:53:07,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:53:07,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:53:07,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:53:07,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:53:07,331 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:53:07,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:53:07,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:53:07,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:53:07,333 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:53:07,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:53:07,334 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:53:07,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:53:07,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:53:07,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:53:07,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:53:07,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:53:07,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:53:07,335 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:53:07,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:53:07,335 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:53:07,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:53:07,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:53:07,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:53:07,336 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:53:07,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:53:07,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:53:07,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:53:07,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:53:07,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:53:07,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:53:07,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:53:07,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:53:07,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:53:07,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:53:07,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:53:07,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:53:07,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:53:07,788 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:53:07,789 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:53:07,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_15-2.c [2020-10-28 14:53:07,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a4d300ff/3c506e750e574cd8ae24cd6b34427e58/FLAGe9999093c [2020-10-28 14:53:08,462 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:53:08,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_15-2.c [2020-10-28 14:53:08,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a4d300ff/3c506e750e574cd8ae24cd6b34427e58/FLAGe9999093c [2020-10-28 14:53:08,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a4d300ff/3c506e750e574cd8ae24cd6b34427e58 [2020-10-28 14:53:08,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:53:08,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:53:08,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:08,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:53:08,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:53:08,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:08" (1/1) ... [2020-10-28 14:53:08,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fbb9511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:08, skipping insertion in model container [2020-10-28 14:53:08,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:08" (1/1) ... [2020-10-28 14:53:08,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:53:08,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:53:09,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:09,128 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:53:09,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:09,189 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:53:09,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:09 WrapperNode [2020-10-28 14:53:09,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:09,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:53:09,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:53:09,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:53:09,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:09" (1/1) ... [2020-10-28 14:53:09,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:09" (1/1) ... [2020-10-28 14:53:09,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:09" (1/1) ... [2020-10-28 14:53:09,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:09" (1/1) ... [2020-10-28 14:53:09,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:09" (1/1) ... [2020-10-28 14:53:09,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:09" (1/1) ... [2020-10-28 14:53:09,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:09" (1/1) ... [2020-10-28 14:53:09,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:53:09,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:53:09,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:53:09,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:53:09,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:53:09,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:53:09,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:53:09,336 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:53:09,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:53:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:53:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:53:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:53:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:53:09,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:53:09,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:53:09,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:53:09,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:53:09,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:53:09,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:53:09,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:53:09,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:53:09,972 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:53:09,972 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:53:09,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:09 BoogieIcfgContainer [2020-10-28 14:53:09,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:53:09,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:53:09,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:53:09,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:53:09,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:53:08" (1/3) ... [2020-10-28 14:53:09,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d9970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:09, skipping insertion in model container [2020-10-28 14:53:09,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:09" (2/3) ... [2020-10-28 14:53:09,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d9970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:09, skipping insertion in model container [2020-10-28 14:53:09,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:09" (3/3) ... [2020-10-28 14:53:09,984 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-2.c [2020-10-28 14:53:09,998 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:53:10,004 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:53:10,019 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:53:10,048 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:53:10,048 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:53:10,048 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:53:10,049 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:53:10,049 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:53:10,049 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:53:10,049 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:53:10,049 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:53:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-10-28 14:53:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:53:10,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:10,077 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] [2020-10-28 14:53:10,077 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:10,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1271024494, now seen corresponding path program 1 times [2020-10-28 14:53:10,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:10,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909752089] [2020-10-28 14:53:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:10,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:10,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:10,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:53:10,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:10,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-28 14:53:10,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:10,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:10,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:10,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:53:10,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:53:10,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:53:10,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:10,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:10,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:10,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:10,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:10,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:53:10,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:10,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:10,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:10,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:10,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:10,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:10,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909752089] [2020-10-28 14:53:10,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:10,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:10,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518050468] [2020-10-28 14:53:10,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:10,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:10,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:10,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:10,845 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 4 states. [2020-10-28 14:53:11,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:11,402 INFO L93 Difference]: Finished difference Result 122 states and 217 transitions. [2020-10-28 14:53:11,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:11,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-28 14:53:11,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:11,418 INFO L225 Difference]: With dead ends: 122 [2020-10-28 14:53:11,419 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 14:53:11,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:11,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 14:53:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2020-10-28 14:53:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:53:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 131 transitions. [2020-10-28 14:53:11,480 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 131 transitions. Word has length 27 [2020-10-28 14:53:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:11,481 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 131 transitions. [2020-10-28 14:53:11,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 131 transitions. [2020-10-28 14:53:11,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:53:11,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:11,483 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] [2020-10-28 14:53:11,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:53:11,483 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:11,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1334999060, now seen corresponding path program 1 times [2020-10-28 14:53:11,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:11,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126331354] [2020-10-28 14:53:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:11,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:11,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:11,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:53:11,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:11,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-28 14:53:11,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:11,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:11,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:11,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:53:11,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:11,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:11,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:11,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:11,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:11,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:11,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:11,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:53:11,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:11,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:11,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:11,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:11,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:11,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126331354] [2020-10-28 14:53:11,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:11,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:11,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790559218] [2020-10-28 14:53:11,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:11,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:11,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:11,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:11,807 INFO L87 Difference]: Start difference. First operand 72 states and 131 transitions. Second operand 4 states. [2020-10-28 14:53:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:12,274 INFO L93 Difference]: Finished difference Result 169 states and 315 transitions. [2020-10-28 14:53:12,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:12,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-28 14:53:12,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:12,281 INFO L225 Difference]: With dead ends: 169 [2020-10-28 14:53:12,282 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 14:53:12,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:12,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 14:53:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-28 14:53:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 14:53:12,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 187 transitions. [2020-10-28 14:53:12,319 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 187 transitions. Word has length 27 [2020-10-28 14:53:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:12,322 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 187 transitions. [2020-10-28 14:53:12,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 187 transitions. [2020-10-28 14:53:12,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:53:12,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:12,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:12,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:53:12,325 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:12,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:12,326 INFO L82 PathProgramCache]: Analyzing trace with hash -740495476, now seen corresponding path program 1 times [2020-10-28 14:53:12,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:12,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378008879] [2020-10-28 14:53:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:12,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:12,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:12,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:12,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:53:12,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:12,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-28 14:53:12,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:12,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:12,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:12,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:53:12,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:12,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:53:12,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:12,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:12,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:12,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:12,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:12,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:53:12,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:12,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:12,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:12,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:12,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378008879] [2020-10-28 14:53:12,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:12,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:12,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211447056] [2020-10-28 14:53:12,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:12,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:12,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:12,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:12,714 INFO L87 Difference]: Start difference. First operand 102 states and 187 transitions. Second operand 4 states. [2020-10-28 14:53:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:12,965 INFO L93 Difference]: Finished difference Result 290 states and 544 transitions. [2020-10-28 14:53:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:12,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-28 14:53:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:12,968 INFO L225 Difference]: With dead ends: 290 [2020-10-28 14:53:12,968 INFO L226 Difference]: Without dead ends: 194 [2020-10-28 14:53:12,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-28 14:53:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2020-10-28 14:53:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-28 14:53:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 358 transitions. [2020-10-28 14:53:12,989 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 358 transitions. Word has length 28 [2020-10-28 14:53:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:12,990 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 358 transitions. [2020-10-28 14:53:12,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 358 transitions. [2020-10-28 14:53:12,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:53:12,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:12,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:12,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:53:12,992 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash 948448266, now seen corresponding path program 1 times [2020-10-28 14:53:12,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:12,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045371763] [2020-10-28 14:53:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:13,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:13,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:13,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:13,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:53:13,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:13,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-28 14:53:13,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:13,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:13,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:13,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:53:13,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:53:13,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:13,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:13,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:13,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:13,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:13,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:13,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:53:13,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:13,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:13,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:13,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:13,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:13,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:13,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045371763] [2020-10-28 14:53:13,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:13,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:13,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461376129] [2020-10-28 14:53:13,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:13,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:13,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:13,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:13,260 INFO L87 Difference]: Start difference. First operand 193 states and 358 transitions. Second operand 4 states. [2020-10-28 14:53:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:13,512 INFO L93 Difference]: Finished difference Result 253 states and 469 transitions. [2020-10-28 14:53:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:13,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-28 14:53:13,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:13,515 INFO L225 Difference]: With dead ends: 253 [2020-10-28 14:53:13,515 INFO L226 Difference]: Without dead ends: 250 [2020-10-28 14:53:13,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:13,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-28 14:53:13,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 193. [2020-10-28 14:53:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-28 14:53:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 356 transitions. [2020-10-28 14:53:13,536 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 356 transitions. Word has length 28 [2020-10-28 14:53:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:13,539 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 356 transitions. [2020-10-28 14:53:13,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:13,540 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 356 transitions. [2020-10-28 14:53:13,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:53:13,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:13,543 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] [2020-10-28 14:53:13,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:53:13,544 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:13,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:13,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1473954531, now seen corresponding path program 1 times [2020-10-28 14:53:13,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:13,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605980687] [2020-10-28 14:53:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:13,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:13,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:13,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:13,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:53:13,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:13,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-28 14:53:13,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:13,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:13,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:13,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:53:13,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:53:13,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:53:13,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:13,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:13,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:13,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:13,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:13,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:53:13,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:13,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:13,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:13,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:13,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:13,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:13,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605980687] [2020-10-28 14:53:13,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:13,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:13,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145025033] [2020-10-28 14:53:13,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:13,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:13,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:13,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:13,886 INFO L87 Difference]: Start difference. First operand 193 states and 356 transitions. Second operand 4 states. [2020-10-28 14:53:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:14,159 INFO L93 Difference]: Finished difference Result 369 states and 687 transitions. [2020-10-28 14:53:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:14,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-28 14:53:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:14,164 INFO L225 Difference]: With dead ends: 369 [2020-10-28 14:53:14,164 INFO L226 Difference]: Without dead ends: 366 [2020-10-28 14:53:14,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-28 14:53:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 261. [2020-10-28 14:53:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-28 14:53:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 480 transitions. [2020-10-28 14:53:14,198 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 480 transitions. Word has length 29 [2020-10-28 14:53:14,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:14,198 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 480 transitions. [2020-10-28 14:53:14,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 480 transitions. [2020-10-28 14:53:14,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:53:14,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:14,201 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] [2020-10-28 14:53:14,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:53:14,202 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:14,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:14,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1132069023, now seen corresponding path program 1 times [2020-10-28 14:53:14,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:14,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368352691] [2020-10-28 14:53:14,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:14,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:14,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:53:14,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:14,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-28 14:53:14,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:14,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:14,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:14,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:53:14,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:14,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:14,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:14,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:14,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:14,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:14,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:14,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:14,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:14,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:14,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:14,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:14,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:14,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368352691] [2020-10-28 14:53:14,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:14,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:14,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895974052] [2020-10-28 14:53:14,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:14,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:14,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:14,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:14,401 INFO L87 Difference]: Start difference. First operand 261 states and 480 transitions. Second operand 4 states. [2020-10-28 14:53:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:14,624 INFO L93 Difference]: Finished difference Result 629 states and 1167 transitions. [2020-10-28 14:53:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:14,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-28 14:53:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:14,628 INFO L225 Difference]: With dead ends: 629 [2020-10-28 14:53:14,628 INFO L226 Difference]: Without dead ends: 374 [2020-10-28 14:53:14,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:14,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-28 14:53:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 373. [2020-10-28 14:53:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-10-28 14:53:14,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 684 transitions. [2020-10-28 14:53:14,645 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 684 transitions. Word has length 29 [2020-10-28 14:53:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:14,646 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 684 transitions. [2020-10-28 14:53:14,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:14,646 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 684 transitions. [2020-10-28 14:53:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:53:14,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:14,648 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] [2020-10-28 14:53:14,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:53:14,648 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:14,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:14,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1558629111, now seen corresponding path program 1 times [2020-10-28 14:53:14,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:14,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713815628] [2020-10-28 14:53:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:14,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:14,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:14,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:53:14,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:14,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-28 14:53:14,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:14,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:14,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:14,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:14,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:53:14,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:15,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:15,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:15,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:15,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:15,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:15,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:15,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:15,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713815628] [2020-10-28 14:53:15,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:15,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:15,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613889868] [2020-10-28 14:53:15,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:15,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:15,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:15,017 INFO L87 Difference]: Start difference. First operand 373 states and 684 transitions. Second operand 4 states. [2020-10-28 14:53:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:15,262 INFO L93 Difference]: Finished difference Result 709 states and 1311 transitions. [2020-10-28 14:53:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:15,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:53:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:15,268 INFO L225 Difference]: With dead ends: 709 [2020-10-28 14:53:15,268 INFO L226 Difference]: Without dead ends: 706 [2020-10-28 14:53:15,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:15,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2020-10-28 14:53:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 513. [2020-10-28 14:53:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-28 14:53:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 932 transitions. [2020-10-28 14:53:15,290 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 932 transitions. Word has length 30 [2020-10-28 14:53:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:15,291 INFO L481 AbstractCegarLoop]: Abstraction has 513 states and 932 transitions. [2020-10-28 14:53:15,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 932 transitions. [2020-10-28 14:53:15,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:53:15,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:15,293 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] [2020-10-28 14:53:15,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:53:15,294 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:15,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:15,294 INFO L82 PathProgramCache]: Analyzing trace with hash -130314631, now seen corresponding path program 1 times [2020-10-28 14:53:15,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:15,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343004928] [2020-10-28 14:53:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:53:15,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:15,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-28 14:53:15,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:15,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:53:15,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:15,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:15,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:15,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:15,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:15,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:15,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:15,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:15,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:15,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343004928] [2020-10-28 14:53:15,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:15,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:15,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454817932] [2020-10-28 14:53:15,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:15,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:15,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:15,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:15,615 INFO L87 Difference]: Start difference. First operand 513 states and 932 transitions. Second operand 4 states. [2020-10-28 14:53:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:15,832 INFO L93 Difference]: Finished difference Result 774 states and 1403 transitions. [2020-10-28 14:53:15,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:15,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:53:15,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:15,836 INFO L225 Difference]: With dead ends: 774 [2020-10-28 14:53:15,837 INFO L226 Difference]: Without dead ends: 523 [2020-10-28 14:53:15,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:15,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-28 14:53:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 522. [2020-10-28 14:53:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-10-28 14:53:15,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 936 transitions. [2020-10-28 14:53:15,858 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 936 transitions. Word has length 30 [2020-10-28 14:53:15,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:15,859 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 936 transitions. [2020-10-28 14:53:15,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 936 transitions. [2020-10-28 14:53:15,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:53:15,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:15,861 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] [2020-10-28 14:53:15,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:53:15,861 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:15,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:15,862 INFO L82 PathProgramCache]: Analyzing trace with hash -947963081, now seen corresponding path program 1 times [2020-10-28 14:53:15,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:15,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482652446] [2020-10-28 14:53:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:15,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:15,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:15,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:53:15,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:15,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-28 14:53:15,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:15,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 14:53:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:15,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:16,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:16,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:16,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:16,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:16,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:16,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482652446] [2020-10-28 14:53:16,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:16,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:16,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283101930] [2020-10-28 14:53:16,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:16,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:16,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:16,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:16,060 INFO L87 Difference]: Start difference. First operand 522 states and 936 transitions. Second operand 4 states. [2020-10-28 14:53:16,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:16,304 INFO L93 Difference]: Finished difference Result 774 states and 1385 transitions. [2020-10-28 14:53:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:16,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:53:16,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:16,308 INFO L225 Difference]: With dead ends: 774 [2020-10-28 14:53:16,309 INFO L226 Difference]: Without dead ends: 523 [2020-10-28 14:53:16,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-28 14:53:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 522. [2020-10-28 14:53:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-10-28 14:53:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 924 transitions. [2020-10-28 14:53:16,332 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 924 transitions. Word has length 30 [2020-10-28 14:53:16,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:16,332 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 924 transitions. [2020-10-28 14:53:16,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:16,332 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 924 transitions. [2020-10-28 14:53:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:53:16,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:16,334 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] [2020-10-28 14:53:16,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:53:16,334 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:16,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:16,335 INFO L82 PathProgramCache]: Analyzing trace with hash -729108363, now seen corresponding path program 1 times [2020-10-28 14:53:16,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:16,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602881809] [2020-10-28 14:53:16,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:53:16,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 14:53:16,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:16,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:16,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:16,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:16,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:16,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:16,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:16,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:16,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:16,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602881809] [2020-10-28 14:53:16,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:16,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:16,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818711556] [2020-10-28 14:53:16,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:16,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:16,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:16,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:16,453 INFO L87 Difference]: Start difference. First operand 522 states and 924 transitions. Second operand 4 states. [2020-10-28 14:53:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:16,707 INFO L93 Difference]: Finished difference Result 1246 states and 2223 transitions. [2020-10-28 14:53:16,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:16,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-28 14:53:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:16,712 INFO L225 Difference]: With dead ends: 1246 [2020-10-28 14:53:16,712 INFO L226 Difference]: Without dead ends: 739 [2020-10-28 14:53:16,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:16,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2020-10-28 14:53:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 738. [2020-10-28 14:53:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-10-28 14:53:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1304 transitions. [2020-10-28 14:53:16,741 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1304 transitions. Word has length 30 [2020-10-28 14:53:16,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:16,741 INFO L481 AbstractCegarLoop]: Abstraction has 738 states and 1304 transitions. [2020-10-28 14:53:16,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1304 transitions. [2020-10-28 14:53:16,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:53:16,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:16,743 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] [2020-10-28 14:53:16,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:53:16,743 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:16,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:16,744 INFO L82 PathProgramCache]: Analyzing trace with hash -303284436, now seen corresponding path program 1 times [2020-10-28 14:53:16,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:16,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353061110] [2020-10-28 14:53:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:53:16,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:16,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-28 14:53:16,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:16,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:16,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:53:16,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:16,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:16,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:16,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:16,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:16,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:16,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:16,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:16,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:16,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:16,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:16,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:16,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353061110] [2020-10-28 14:53:16,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:16,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:16,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967521900] [2020-10-28 14:53:16,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:16,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:16,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:16,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:16,935 INFO L87 Difference]: Start difference. First operand 738 states and 1304 transitions. Second operand 4 states. [2020-10-28 14:53:17,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:17,188 INFO L93 Difference]: Finished difference Result 1382 states and 2475 transitions. [2020-10-28 14:53:17,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:17,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-28 14:53:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:17,197 INFO L225 Difference]: With dead ends: 1382 [2020-10-28 14:53:17,197 INFO L226 Difference]: Without dead ends: 1379 [2020-10-28 14:53:17,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:17,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2020-10-28 14:53:17,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1026. [2020-10-28 14:53:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1026 states. [2020-10-28 14:53:17,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1784 transitions. [2020-10-28 14:53:17,243 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1784 transitions. Word has length 31 [2020-10-28 14:53:17,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:17,243 INFO L481 AbstractCegarLoop]: Abstraction has 1026 states and 1784 transitions. [2020-10-28 14:53:17,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:17,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1784 transitions. [2020-10-28 14:53:17,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:53:17,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:17,246 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] [2020-10-28 14:53:17,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:53:17,246 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1992228178, now seen corresponding path program 1 times [2020-10-28 14:53:17,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:17,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385564551] [2020-10-28 14:53:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:53:17,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:17,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-28 14:53:17,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:17,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:17,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:17,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:17,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:17,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:17,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:17,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:17,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:17,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:17,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:17,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:17,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:17,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385564551] [2020-10-28 14:53:17,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:17,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:17,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570484517] [2020-10-28 14:53:17,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:17,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:17,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:17,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:17,465 INFO L87 Difference]: Start difference. First operand 1026 states and 1784 transitions. Second operand 4 states. [2020-10-28 14:53:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:17,745 INFO L93 Difference]: Finished difference Result 2454 states and 4299 transitions. [2020-10-28 14:53:17,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:17,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-28 14:53:17,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:17,755 INFO L225 Difference]: With dead ends: 2454 [2020-10-28 14:53:17,755 INFO L226 Difference]: Without dead ends: 1443 [2020-10-28 14:53:17,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2020-10-28 14:53:17,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1442. [2020-10-28 14:53:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2020-10-28 14:53:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2504 transitions. [2020-10-28 14:53:17,813 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2504 transitions. Word has length 31 [2020-10-28 14:53:17,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:17,813 INFO L481 AbstractCegarLoop]: Abstraction has 1442 states and 2504 transitions. [2020-10-28 14:53:17,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2504 transitions. [2020-10-28 14:53:17,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:53:17,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:17,816 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] [2020-10-28 14:53:17,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:53:17,817 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:17,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:17,817 INFO L82 PathProgramCache]: Analyzing trace with hash -805282466, now seen corresponding path program 1 times [2020-10-28 14:53:17,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:17,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241350983] [2020-10-28 14:53:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:17,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:17,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:53:18,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:18,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-28 14:53:18,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:18,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:53:18,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:53:18,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:18,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:18,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:18,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:18,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:18,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:18,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:18,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:18,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241350983] [2020-10-28 14:53:18,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:18,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:18,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071928089] [2020-10-28 14:53:18,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:18,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:18,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:18,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:18,070 INFO L87 Difference]: Start difference. First operand 1442 states and 2504 transitions. Second operand 4 states. [2020-10-28 14:53:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:18,389 INFO L93 Difference]: Finished difference Result 2678 states and 4715 transitions. [2020-10-28 14:53:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:18,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-28 14:53:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:18,405 INFO L225 Difference]: With dead ends: 2678 [2020-10-28 14:53:18,406 INFO L226 Difference]: Without dead ends: 2675 [2020-10-28 14:53:18,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:18,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2020-10-28 14:53:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2034. [2020-10-28 14:53:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2034 states. [2020-10-28 14:53:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 3464 transitions. [2020-10-28 14:53:18,502 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 3464 transitions. Word has length 32 [2020-10-28 14:53:18,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:18,502 INFO L481 AbstractCegarLoop]: Abstraction has 2034 states and 3464 transitions. [2020-10-28 14:53:18,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 3464 transitions. [2020-10-28 14:53:18,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:53:18,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:18,507 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] [2020-10-28 14:53:18,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:53:18,508 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:18,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:18,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1800741088, now seen corresponding path program 1 times [2020-10-28 14:53:18,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:18,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689430391] [2020-10-28 14:53:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:53:18,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:18,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-28 14:53:18,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:18,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:18,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:18,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:18,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:18,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:18,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:18,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:18,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:18,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:53:18,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:18,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:18,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:18,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:18,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:18,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:18,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689430391] [2020-10-28 14:53:18,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:18,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:18,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807608369] [2020-10-28 14:53:18,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:18,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:18,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:18,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:18,791 INFO L87 Difference]: Start difference. First operand 2034 states and 3464 transitions. Second operand 4 states. [2020-10-28 14:53:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:19,131 INFO L93 Difference]: Finished difference Result 3038 states and 5163 transitions. [2020-10-28 14:53:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:19,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-28 14:53:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:19,144 INFO L225 Difference]: With dead ends: 3038 [2020-10-28 14:53:19,144 INFO L226 Difference]: Without dead ends: 2043 [2020-10-28 14:53:19,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:19,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2020-10-28 14:53:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 2042. [2020-10-28 14:53:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2042 states. [2020-10-28 14:53:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 3432 transitions. [2020-10-28 14:53:19,251 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 3432 transitions. Word has length 32 [2020-10-28 14:53:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:19,251 INFO L481 AbstractCegarLoop]: Abstraction has 2042 states and 3432 transitions. [2020-10-28 14:53:19,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 3432 transitions. [2020-10-28 14:53:19,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:53:19,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:19,256 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] [2020-10-28 14:53:19,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:53:19,256 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:19,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:19,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2071524382, now seen corresponding path program 1 times [2020-10-28 14:53:19,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:19,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179258405] [2020-10-28 14:53:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:19,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:19,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:53:19,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:19,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-28 14:53:19,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:19,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:19,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:19,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:53:19,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:19,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:19,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:19,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:19,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:19,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:19,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:19,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:19,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:19,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:19,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:19,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:19,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:19,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179258405] [2020-10-28 14:53:19,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:19,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:19,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682080742] [2020-10-28 14:53:19,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:19,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:19,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:19,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:19,435 INFO L87 Difference]: Start difference. First operand 2042 states and 3432 transitions. Second operand 4 states. [2020-10-28 14:53:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:19,673 INFO L93 Difference]: Finished difference Result 3054 states and 5123 transitions. [2020-10-28 14:53:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:19,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-28 14:53:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:19,685 INFO L225 Difference]: With dead ends: 3054 [2020-10-28 14:53:19,685 INFO L226 Difference]: Without dead ends: 2059 [2020-10-28 14:53:19,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:19,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2020-10-28 14:53:19,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 2058. [2020-10-28 14:53:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2058 states. [2020-10-28 14:53:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 3416 transitions. [2020-10-28 14:53:19,752 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 3416 transitions. Word has length 32 [2020-10-28 14:53:19,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:19,752 INFO L481 AbstractCegarLoop]: Abstraction has 2058 states and 3416 transitions. [2020-10-28 14:53:19,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:19,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 3416 transitions. [2020-10-28 14:53:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 14:53:19,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:19,755 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] [2020-10-28 14:53:19,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:53:19,756 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:19,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1405794464, now seen corresponding path program 1 times [2020-10-28 14:53:19,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:19,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358328362] [2020-10-28 14:53:19,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:19,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:19,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 14:53:19,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:19,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-28 14:53:19,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:19,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:53:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:19,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:19,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:19,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:19,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:19,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:19,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:19,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:19,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:19,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:19,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:19,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:19,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:19,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:19,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358328362] [2020-10-28 14:53:19,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:19,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:19,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877151241] [2020-10-28 14:53:19,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:19,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:19,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:19,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:19,855 INFO L87 Difference]: Start difference. First operand 2058 states and 3416 transitions. Second operand 4 states. [2020-10-28 14:53:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:20,144 INFO L93 Difference]: Finished difference Result 4878 states and 8155 transitions. [2020-10-28 14:53:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:20,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-28 14:53:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:20,159 INFO L225 Difference]: With dead ends: 4878 [2020-10-28 14:53:20,159 INFO L226 Difference]: Without dead ends: 2859 [2020-10-28 14:53:20,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2020-10-28 14:53:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2858. [2020-10-28 14:53:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2858 states. [2020-10-28 14:53:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4744 transitions. [2020-10-28 14:53:20,250 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4744 transitions. Word has length 32 [2020-10-28 14:53:20,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:20,251 INFO L481 AbstractCegarLoop]: Abstraction has 2858 states and 4744 transitions. [2020-10-28 14:53:20,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4744 transitions. [2020-10-28 14:53:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:53:20,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:20,254 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] [2020-10-28 14:53:20,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:53:20,255 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:20,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1454214903, now seen corresponding path program 1 times [2020-10-28 14:53:20,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:20,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875119763] [2020-10-28 14:53:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:20,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:53:20,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:20,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-28 14:53:20,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:20,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:20,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:20,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:53:20,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:53:20,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:20,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:20,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:20,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:20,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:20,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:20,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:20,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:20,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:20,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:20,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:20,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875119763] [2020-10-28 14:53:20,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:20,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:20,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586281561] [2020-10-28 14:53:20,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:20,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:20,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:20,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:20,410 INFO L87 Difference]: Start difference. First operand 2858 states and 4744 transitions. Second operand 4 states. [2020-10-28 14:53:20,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:20,722 INFO L93 Difference]: Finished difference Result 5230 states and 8843 transitions. [2020-10-28 14:53:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:20,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 14:53:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:20,779 INFO L225 Difference]: With dead ends: 5230 [2020-10-28 14:53:20,780 INFO L226 Difference]: Without dead ends: 5227 [2020-10-28 14:53:20,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2020-10-28 14:53:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 4074. [2020-10-28 14:53:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4074 states. [2020-10-28 14:53:20,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 6600 transitions. [2020-10-28 14:53:20,912 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 6600 transitions. Word has length 33 [2020-10-28 14:53:20,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:20,913 INFO L481 AbstractCegarLoop]: Abstraction has 4074 states and 6600 transitions. [2020-10-28 14:53:20,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:20,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 6600 transitions. [2020-10-28 14:53:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:53:20,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:20,919 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] [2020-10-28 14:53:20,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:53:20,920 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:20,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:20,920 INFO L82 PathProgramCache]: Analyzing trace with hash -234728839, now seen corresponding path program 1 times [2020-10-28 14:53:20,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:20,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118091933] [2020-10-28 14:53:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:20,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:20,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:21,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:53:21,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:21,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-28 14:53:21,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:21,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:21,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:21,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:53:21,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:21,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:21,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:21,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:21,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:21,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:21,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:21,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:21,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:21,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:21,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118091933] [2020-10-28 14:53:21,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:21,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:21,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30565345] [2020-10-28 14:53:21,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:21,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:21,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:21,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:21,087 INFO L87 Difference]: Start difference. First operand 4074 states and 6600 transitions. Second operand 4 states. [2020-10-28 14:53:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:21,412 INFO L93 Difference]: Finished difference Result 9646 states and 15755 transitions. [2020-10-28 14:53:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:21,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 14:53:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:21,443 INFO L225 Difference]: With dead ends: 9646 [2020-10-28 14:53:21,443 INFO L226 Difference]: Without dead ends: 5611 [2020-10-28 14:53:21,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:21,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2020-10-28 14:53:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 5610. [2020-10-28 14:53:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5610 states. [2020-10-28 14:53:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5610 states to 5610 states and 9096 transitions. [2020-10-28 14:53:21,699 INFO L78 Accepts]: Start accepts. Automaton has 5610 states and 9096 transitions. Word has length 33 [2020-10-28 14:53:21,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:21,700 INFO L481 AbstractCegarLoop]: Abstraction has 5610 states and 9096 transitions. [2020-10-28 14:53:21,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:21,700 INFO L276 IsEmpty]: Start isEmpty. Operand 5610 states and 9096 transitions. [2020-10-28 14:53:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:53:21,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:21,707 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] [2020-10-28 14:53:21,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:53:21,708 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:21,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:21,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2137610633, now seen corresponding path program 1 times [2020-10-28 14:53:21,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:21,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738955672] [2020-10-28 14:53:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:21,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:21,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:53:21,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:21,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-28 14:53:21,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:21,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:21,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:21,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:53:21,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:53:21,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:21,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:21,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:21,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:21,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:21,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:21,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:21,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:21,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:21,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:21,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:21,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:21,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:21,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738955672] [2020-10-28 14:53:21,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:21,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:21,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895360274] [2020-10-28 14:53:21,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:21,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:21,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:21,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:21,974 INFO L87 Difference]: Start difference. First operand 5610 states and 9096 transitions. Second operand 4 states. [2020-10-28 14:53:22,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:22,448 INFO L93 Difference]: Finished difference Result 10158 states and 16779 transitions. [2020-10-28 14:53:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:22,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-28 14:53:22,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:22,471 INFO L225 Difference]: With dead ends: 10158 [2020-10-28 14:53:22,471 INFO L226 Difference]: Without dead ends: 10155 [2020-10-28 14:53:22,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:22,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10155 states. [2020-10-28 14:53:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10155 to 8106. [2020-10-28 14:53:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8106 states. [2020-10-28 14:53:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8106 states to 8106 states and 12808 transitions. [2020-10-28 14:53:22,707 INFO L78 Accepts]: Start accepts. Automaton has 8106 states and 12808 transitions. Word has length 34 [2020-10-28 14:53:22,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:22,708 INFO L481 AbstractCegarLoop]: Abstraction has 8106 states and 12808 transitions. [2020-10-28 14:53:22,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 8106 states and 12808 transitions. [2020-10-28 14:53:22,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:53:22,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:22,720 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] [2020-10-28 14:53:22,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:53:22,721 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:22,721 INFO L82 PathProgramCache]: Analyzing trace with hash 448666891, now seen corresponding path program 1 times [2020-10-28 14:53:22,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:22,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879168996] [2020-10-28 14:53:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:22,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:22,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:53:22,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:22,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-28 14:53:22,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:22,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:53:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:22,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:22,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:22,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:22,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:22,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:22,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:22,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:22,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:22,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:22,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:22,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:22,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:22,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:22,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879168996] [2020-10-28 14:53:22,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:22,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:22,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206782374] [2020-10-28 14:53:22,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:22,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:22,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:22,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:22,965 INFO L87 Difference]: Start difference. First operand 8106 states and 12808 transitions. Second operand 4 states. [2020-10-28 14:53:23,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:23,421 INFO L93 Difference]: Finished difference Result 19118 states and 30475 transitions. [2020-10-28 14:53:23,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:23,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-28 14:53:23,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:23,454 INFO L225 Difference]: With dead ends: 19118 [2020-10-28 14:53:23,455 INFO L226 Difference]: Without dead ends: 11051 [2020-10-28 14:53:23,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:23,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11051 states. [2020-10-28 14:53:23,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11051 to 11050. [2020-10-28 14:53:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11050 states. [2020-10-28 14:53:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11050 states to 11050 states and 17480 transitions. [2020-10-28 14:53:23,940 INFO L78 Accepts]: Start accepts. Automaton has 11050 states and 17480 transitions. Word has length 34 [2020-10-28 14:53:23,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:23,940 INFO L481 AbstractCegarLoop]: Abstraction has 11050 states and 17480 transitions. [2020-10-28 14:53:23,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 11050 states and 17480 transitions. [2020-10-28 14:53:23,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:53:23,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:23,952 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 14:53:23,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:53:23,952 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:23,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1848052354, now seen corresponding path program 1 times [2020-10-28 14:53:23,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:23,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432209284] [2020-10-28 14:53:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:23,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:23,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:24,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:53:24,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:24,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-28 14:53:24,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:24,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:24,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:24,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:53:24,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:53:24,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:24,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:24,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:24,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:24,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:24,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:24,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:24,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:24,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:24,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:24,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432209284] [2020-10-28 14:53:24,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:24,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:24,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333360198] [2020-10-28 14:53:24,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:24,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:24,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:24,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:24,370 INFO L87 Difference]: Start difference. First operand 11050 states and 17480 transitions. Second operand 4 states. [2020-10-28 14:53:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:25,139 INFO L93 Difference]: Finished difference Result 19758 states and 31819 transitions. [2020-10-28 14:53:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:25,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 14:53:25,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:25,202 INFO L225 Difference]: With dead ends: 19758 [2020-10-28 14:53:25,202 INFO L226 Difference]: Without dead ends: 19755 [2020-10-28 14:53:25,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19755 states. [2020-10-28 14:53:25,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19755 to 16170. [2020-10-28 14:53:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16170 states. [2020-10-28 14:53:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16170 states to 16170 states and 24904 transitions. [2020-10-28 14:53:25,855 INFO L78 Accepts]: Start accepts. Automaton has 16170 states and 24904 transitions. Word has length 35 [2020-10-28 14:53:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:25,855 INFO L481 AbstractCegarLoop]: Abstraction has 16170 states and 24904 transitions. [2020-10-28 14:53:25,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 16170 states and 24904 transitions. [2020-10-28 14:53:25,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:53:25,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:25,878 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 14:53:25,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:53:25,878 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:25,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:25,879 INFO L82 PathProgramCache]: Analyzing trace with hash 159108612, now seen corresponding path program 1 times [2020-10-28 14:53:25,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:25,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115372944] [2020-10-28 14:53:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:25,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:25,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:25,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:25,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:26,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:26,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:53:26,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:26,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-28 14:53:26,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:26,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:53:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:26,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:26,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:26,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:26,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:26,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:26,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:26,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:26,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:26,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:26,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:26,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:26,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:26,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:26,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115372944] [2020-10-28 14:53:26,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:26,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:26,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366329215] [2020-10-28 14:53:26,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:26,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:26,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:26,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:26,300 INFO L87 Difference]: Start difference. First operand 16170 states and 24904 transitions. Second operand 4 states. [2020-10-28 14:53:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:26,720 INFO L93 Difference]: Finished difference Result 24334 states and 37451 transitions. [2020-10-28 14:53:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:26,721 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 14:53:26,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:26,762 INFO L225 Difference]: With dead ends: 24334 [2020-10-28 14:53:26,762 INFO L226 Difference]: Without dead ends: 16395 [2020-10-28 14:53:26,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:26,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16395 states. [2020-10-28 14:53:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16395 to 16394. [2020-10-28 14:53:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16394 states. [2020-10-28 14:53:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16394 states to 16394 states and 24968 transitions. [2020-10-28 14:53:27,273 INFO L78 Accepts]: Start accepts. Automaton has 16394 states and 24968 transitions. Word has length 35 [2020-10-28 14:53:27,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:27,274 INFO L481 AbstractCegarLoop]: Abstraction has 16394 states and 24968 transitions. [2020-10-28 14:53:27,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand 16394 states and 24968 transitions. [2020-10-28 14:53:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:53:27,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:27,296 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 14:53:27,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:53:27,296 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash -658539838, now seen corresponding path program 1 times [2020-10-28 14:53:27,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:27,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428456783] [2020-10-28 14:53:27,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:27,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:27,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:27,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:27,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:27,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:53:27,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:27,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-28 14:53:27,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:27,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:27,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:27,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 14:53:27,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:27,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:27,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:27,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:27,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:27,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:27,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:27,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:27,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:27,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:27,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:27,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:27,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:27,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428456783] [2020-10-28 14:53:27,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:27,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:27,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841979505] [2020-10-28 14:53:27,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:27,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:27,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:27,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:27,555 INFO L87 Difference]: Start difference. First operand 16394 states and 24968 transitions. Second operand 4 states. [2020-10-28 14:53:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:28,091 INFO L93 Difference]: Finished difference Result 24334 states and 36875 transitions. [2020-10-28 14:53:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:28,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 14:53:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:28,129 INFO L225 Difference]: With dead ends: 24334 [2020-10-28 14:53:28,129 INFO L226 Difference]: Without dead ends: 16395 [2020-10-28 14:53:28,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16395 states. [2020-10-28 14:53:28,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16395 to 16394. [2020-10-28 14:53:28,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16394 states. [2020-10-28 14:53:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16394 states to 16394 states and 24584 transitions. [2020-10-28 14:53:28,530 INFO L78 Accepts]: Start accepts. Automaton has 16394 states and 24584 transitions. Word has length 35 [2020-10-28 14:53:28,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:28,530 INFO L481 AbstractCegarLoop]: Abstraction has 16394 states and 24584 transitions. [2020-10-28 14:53:28,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 16394 states and 24584 transitions. [2020-10-28 14:53:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:53:28,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:28,556 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 14:53:28,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:53:28,556 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:28,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:28,556 INFO L82 PathProgramCache]: Analyzing trace with hash -235838012, now seen corresponding path program 1 times [2020-10-28 14:53:28,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:28,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892498941] [2020-10-28 14:53:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:28,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:28,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:28,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:28,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:53:28,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:28,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-28 14:53:28,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:28,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:28,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:28,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:53:28,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:28,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:28,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:28,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:28,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:28,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:28,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:28,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:28,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:28,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:28,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:28,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:28,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:28,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:28,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892498941] [2020-10-28 14:53:28,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:28,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:28,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109782244] [2020-10-28 14:53:28,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:28,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:28,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:28,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:28,724 INFO L87 Difference]: Start difference. First operand 16394 states and 24584 transitions. Second operand 4 states. [2020-10-28 14:53:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:29,397 INFO L93 Difference]: Finished difference Result 38158 states and 57611 transitions. [2020-10-28 14:53:29,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:29,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 14:53:29,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:29,448 INFO L225 Difference]: With dead ends: 38158 [2020-10-28 14:53:29,448 INFO L226 Difference]: Without dead ends: 22027 [2020-10-28 14:53:29,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:29,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22027 states. [2020-10-28 14:53:30,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22027 to 22026. [2020-10-28 14:53:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22026 states. [2020-10-28 14:53:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22026 states to 22026 states and 33032 transitions. [2020-10-28 14:53:30,249 INFO L78 Accepts]: Start accepts. Automaton has 22026 states and 33032 transitions. Word has length 35 [2020-10-28 14:53:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:30,250 INFO L481 AbstractCegarLoop]: Abstraction has 22026 states and 33032 transitions. [2020-10-28 14:53:30,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 22026 states and 33032 transitions. [2020-10-28 14:53:30,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:53:30,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:30,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:30,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:53:30,281 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:30,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:30,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2103247412, now seen corresponding path program 1 times [2020-10-28 14:53:30,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:30,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475554345] [2020-10-28 14:53:30,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:30,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:30,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:30,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:30,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:30,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:53:30,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:30,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-28 14:53:30,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:30,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:30,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:30,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:53:30,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:30,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:30,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:30,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:30,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:30,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:30,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:30,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:30,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:30,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:30,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:30,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:30,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:30,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:30,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475554345] [2020-10-28 14:53:30,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:30,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:30,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970318355] [2020-10-28 14:53:30,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:30,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:30,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:30,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:30,547 INFO L87 Difference]: Start difference. First operand 22026 states and 33032 transitions. Second operand 4 states. [2020-10-28 14:53:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:31,157 INFO L93 Difference]: Finished difference Result 33038 states and 49419 transitions. [2020-10-28 14:53:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:31,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-28 14:53:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:31,206 INFO L225 Difference]: With dead ends: 33038 [2020-10-28 14:53:31,207 INFO L226 Difference]: Without dead ends: 22283 [2020-10-28 14:53:31,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22283 states. [2020-10-28 14:53:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22283 to 22282. [2020-10-28 14:53:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22282 states. [2020-10-28 14:53:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22282 states to 22282 states and 33032 transitions. [2020-10-28 14:53:31,954 INFO L78 Accepts]: Start accepts. Automaton has 22282 states and 33032 transitions. Word has length 36 [2020-10-28 14:53:31,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:31,954 INFO L481 AbstractCegarLoop]: Abstraction has 22282 states and 33032 transitions. [2020-10-28 14:53:31,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:31,954 INFO L276 IsEmpty]: Start isEmpty. Operand 22282 states and 33032 transitions. [2020-10-28 14:53:31,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:53:31,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:31,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:31,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:53:31,981 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:31,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1285598962, now seen corresponding path program 1 times [2020-10-28 14:53:31,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:31,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095712528] [2020-10-28 14:53:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:31,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:32,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:32,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:32,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:53:32,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:32,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 14:53:32,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:32,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:32,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:32,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:53:32,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:32,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:32,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:32,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:32,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:32,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:32,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:32,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:32,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:32,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:32,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:32,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:32,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:32,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:32,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095712528] [2020-10-28 14:53:32,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:32,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991839965] [2020-10-28 14:53:32,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:32,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:32,130 INFO L87 Difference]: Start difference. First operand 22282 states and 33032 transitions. Second operand 4 states. [2020-10-28 14:53:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:32,734 INFO L93 Difference]: Finished difference Result 33038 states and 48651 transitions. [2020-10-28 14:53:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:32,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-28 14:53:32,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:32,784 INFO L225 Difference]: With dead ends: 33038 [2020-10-28 14:53:32,785 INFO L226 Difference]: Without dead ends: 22283 [2020-10-28 14:53:32,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22283 states. [2020-10-28 14:53:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22283 to 22282. [2020-10-28 14:53:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22282 states. [2020-10-28 14:53:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22282 states to 22282 states and 32520 transitions. [2020-10-28 14:53:33,327 INFO L78 Accepts]: Start accepts. Automaton has 22282 states and 32520 transitions. Word has length 36 [2020-10-28 14:53:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:33,328 INFO L481 AbstractCegarLoop]: Abstraction has 22282 states and 32520 transitions. [2020-10-28 14:53:33,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:33,328 INFO L276 IsEmpty]: Start isEmpty. Operand 22282 states and 32520 transitions. [2020-10-28 14:53:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:53:33,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:33,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:33,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:53:33,357 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:33,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:33,360 INFO L82 PathProgramCache]: Analyzing trace with hash -519839372, now seen corresponding path program 1 times [2020-10-28 14:53:33,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:33,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8997830] [2020-10-28 14:53:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:33,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:33,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:33,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:53:33,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:33,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 14:53:33,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:33,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:33,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:33,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 14:53:33,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:33,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:33,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:33,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:33,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:33,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:33,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:33,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:33,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:33,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:33,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:33,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:33,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:33,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:33,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8997830] [2020-10-28 14:53:33,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:33,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:33,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654585604] [2020-10-28 14:53:33,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:33,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:33,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:33,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:33,459 INFO L87 Difference]: Start difference. First operand 22282 states and 32520 transitions. Second operand 4 states. [2020-10-28 14:53:34,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:34,351 INFO L93 Difference]: Finished difference Result 65294 states and 94475 transitions. [2020-10-28 14:53:34,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:34,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-28 14:53:34,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:34,414 INFO L225 Difference]: With dead ends: 65294 [2020-10-28 14:53:34,414 INFO L226 Difference]: Without dead ends: 43531 [2020-10-28 14:53:34,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43531 states. [2020-10-28 14:53:35,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43531 to 43530. [2020-10-28 14:53:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43530 states. [2020-10-28 14:53:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43530 states to 43530 states and 61960 transitions. [2020-10-28 14:53:35,807 INFO L78 Accepts]: Start accepts. Automaton has 43530 states and 61960 transitions. Word has length 36 [2020-10-28 14:53:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:35,807 INFO L481 AbstractCegarLoop]: Abstraction has 43530 states and 61960 transitions. [2020-10-28 14:53:35,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 43530 states and 61960 transitions. [2020-10-28 14:53:35,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:53:35,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:35,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:35,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:53:35,841 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:35,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1169104370, now seen corresponding path program 1 times [2020-10-28 14:53:35,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:35,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021854153] [2020-10-28 14:53:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:35,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:35,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:35,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:53:35,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:35,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 14:53:35,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:35,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:35,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:35,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 14:53:35,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:53:35,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:35,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:35,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:35,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:35,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:35,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:35,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:53:35,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:35,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:35,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:35,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021854153] [2020-10-28 14:53:35,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:35,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:35,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733609842] [2020-10-28 14:53:35,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:35,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:35,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:35,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:35,962 INFO L87 Difference]: Start difference. First operand 43530 states and 61960 transitions. Second operand 4 states. [2020-10-28 14:53:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:37,156 INFO L93 Difference]: Finished difference Result 49678 states and 73227 transitions. [2020-10-28 14:53:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:37,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-28 14:53:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:37,223 INFO L225 Difference]: With dead ends: 49678 [2020-10-28 14:53:37,223 INFO L226 Difference]: Without dead ends: 49675 [2020-10-28 14:53:37,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49675 states. [2020-10-28 14:53:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49675 to 43530. [2020-10-28 14:53:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43530 states. [2020-10-28 14:53:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43530 states to 43530 states and 61448 transitions. [2020-10-28 14:53:38,461 INFO L78 Accepts]: Start accepts. Automaton has 43530 states and 61448 transitions. Word has length 36 [2020-10-28 14:53:38,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:38,461 INFO L481 AbstractCegarLoop]: Abstraction has 43530 states and 61448 transitions. [2020-10-28 14:53:38,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 43530 states and 61448 transitions. [2020-10-28 14:53:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:53:38,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:38,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:38,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:53:38,486 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:38,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1071501965, now seen corresponding path program 1 times [2020-10-28 14:53:38,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:38,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198548577] [2020-10-28 14:53:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:38,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:38,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:38,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:53:38,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:38,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 14:53:38,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:38,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:38,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:38,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:53:38,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:53:38,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:38,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:38,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:38,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:38,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:38,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:38,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:38,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:38,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:38,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:38,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:38,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:38,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:38,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198548577] [2020-10-28 14:53:38,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:38,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:38,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864618478] [2020-10-28 14:53:38,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:38,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:38,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:38,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:38,594 INFO L87 Difference]: Start difference. First operand 43530 states and 61448 transitions. Second operand 4 states. [2020-10-28 14:53:39,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:39,948 INFO L93 Difference]: Finished difference Result 75278 states and 108555 transitions. [2020-10-28 14:53:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:39,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-28 14:53:39,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:40,088 INFO L225 Difference]: With dead ends: 75278 [2020-10-28 14:53:40,088 INFO L226 Difference]: Without dead ends: 75275 [2020-10-28 14:53:40,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75275 states. [2020-10-28 14:53:41,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75275 to 65034. [2020-10-28 14:53:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65034 states. [2020-10-28 14:53:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65034 states to 65034 states and 89096 transitions. [2020-10-28 14:53:41,594 INFO L78 Accepts]: Start accepts. Automaton has 65034 states and 89096 transitions. Word has length 37 [2020-10-28 14:53:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:41,594 INFO L481 AbstractCegarLoop]: Abstraction has 65034 states and 89096 transitions. [2020-10-28 14:53:41,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 65034 states and 89096 transitions. [2020-10-28 14:53:41,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:53:41,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:41,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:41,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:53:41,642 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:41,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:41,643 INFO L82 PathProgramCache]: Analyzing trace with hash -617441777, now seen corresponding path program 1 times [2020-10-28 14:53:41,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:41,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873332210] [2020-10-28 14:53:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:41,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:41,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:41,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:53:41,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:41,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 14:53:41,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:41,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:41,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:41,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:53:41,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:41,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:41,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:41,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:41,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:41,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:41,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:41,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:41,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:41,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:41,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:41,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:41,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:41,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873332210] [2020-10-28 14:53:41,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:41,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:41,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440758002] [2020-10-28 14:53:41,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:41,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:41,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:41,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:41,738 INFO L87 Difference]: Start difference. First operand 65034 states and 89096 transitions. Second operand 4 states. [2020-10-28 14:53:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:43,234 INFO L93 Difference]: Finished difference Result 150030 states and 206859 transitions. [2020-10-28 14:53:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:43,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-28 14:53:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:43,339 INFO L225 Difference]: With dead ends: 150030 [2020-10-28 14:53:43,339 INFO L226 Difference]: Without dead ends: 85515 [2020-10-28 14:53:43,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85515 states. [2020-10-28 14:53:45,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85515 to 85514. [2020-10-28 14:53:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85514 states. [2020-10-28 14:53:45,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85514 states to 85514 states and 116744 transitions. [2020-10-28 14:53:45,589 INFO L78 Accepts]: Start accepts. Automaton has 85514 states and 116744 transitions. Word has length 37 [2020-10-28 14:53:45,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:45,590 INFO L481 AbstractCegarLoop]: Abstraction has 85514 states and 116744 transitions. [2020-10-28 14:53:45,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:45,590 INFO L276 IsEmpty]: Start isEmpty. Operand 85514 states and 116744 transitions. [2020-10-28 14:53:45,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:53:45,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:45,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:45,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:53:45,624 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1136513569, now seen corresponding path program 1 times [2020-10-28 14:53:45,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:45,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957963911] [2020-10-28 14:53:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:45,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:45,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:45,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:45,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:53:45,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:45,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 14:53:45,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:45,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 14:53:45,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:53:45,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:45,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:45,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:45,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:45,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:45,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:45,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:45,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:45,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:45,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:45,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:45,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:45,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:45,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957963911] [2020-10-28 14:53:45,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:45,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:45,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888081155] [2020-10-28 14:53:45,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:45,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:45,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:45,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:45,804 INFO L87 Difference]: Start difference. First operand 85514 states and 116744 transitions. Second operand 4 states. [2020-10-28 14:53:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:48,275 INFO L93 Difference]: Finished difference Result 145934 states and 202763 transitions. [2020-10-28 14:53:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:48,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-28 14:53:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:48,487 INFO L225 Difference]: With dead ends: 145934 [2020-10-28 14:53:48,488 INFO L226 Difference]: Without dead ends: 145931 [2020-10-28 14:53:48,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:48,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145931 states. [2020-10-28 14:53:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145931 to 129546. [2020-10-28 14:53:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129546 states. [2020-10-28 14:53:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129546 states to 129546 states and 172040 transitions. [2020-10-28 14:53:51,461 INFO L78 Accepts]: Start accepts. Automaton has 129546 states and 172040 transitions. Word has length 38 [2020-10-28 14:53:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:51,462 INFO L481 AbstractCegarLoop]: Abstraction has 129546 states and 172040 transitions. [2020-10-28 14:53:51,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 129546 states and 172040 transitions. [2020-10-28 14:53:51,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:53:51,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:51,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:51,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:53:51,527 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:51,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:51,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1469509985, now seen corresponding path program 1 times [2020-10-28 14:53:51,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:51,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962033475] [2020-10-28 14:53:51,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:51,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:51,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:51,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:51,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:53:51,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:51,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 14:53:51,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:51,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 14:53:51,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:51,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:51,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:51,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:51,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:51,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:51,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:51,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:51,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:51,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:51,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:51,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:51,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:51,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:51,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962033475] [2020-10-28 14:53:51,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:51,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:51,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052115404] [2020-10-28 14:53:51,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:51,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:51,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:51,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:51,672 INFO L87 Difference]: Start difference. First operand 129546 states and 172040 transitions. Second operand 4 states. [2020-10-28 14:53:54,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:54,551 INFO L93 Difference]: Finished difference Result 297486 states and 397323 transitions. [2020-10-28 14:53:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:54,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-28 14:53:54,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:54,789 INFO L225 Difference]: With dead ends: 297486 [2020-10-28 14:53:54,789 INFO L226 Difference]: Without dead ends: 168459 [2020-10-28 14:53:54,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:55,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168459 states. [2020-10-28 14:53:58,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168459 to 168458. [2020-10-28 14:53:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168458 states. [2020-10-28 14:53:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168458 states to 168458 states and 222216 transitions. [2020-10-28 14:53:59,178 INFO L78 Accepts]: Start accepts. Automaton has 168458 states and 222216 transitions. Word has length 38 [2020-10-28 14:53:59,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:59,179 INFO L481 AbstractCegarLoop]: Abstraction has 168458 states and 222216 transitions. [2020-10-28 14:53:59,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand 168458 states and 222216 transitions. [2020-10-28 14:53:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:53:59,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:59,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:59,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:53:59,266 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:59,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:59,266 INFO L82 PathProgramCache]: Analyzing trace with hash -865507816, now seen corresponding path program 1 times [2020-10-28 14:53:59,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:59,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394014542] [2020-10-28 14:53:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:59,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:59,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:59,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:59,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:59,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:53:59,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:59,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-28 14:53:59,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:59,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:53:59,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:53:59,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:59,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:59,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:59,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:59,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:59,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:59,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:53:59,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:59,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:59,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:59,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:59,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:59,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:59,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394014542] [2020-10-28 14:53:59,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:59,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:59,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800537894] [2020-10-28 14:53:59,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:59,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:59,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:59,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:59,470 INFO L87 Difference]: Start difference. First operand 168458 states and 222216 transitions. Second operand 4 states. [2020-10-28 14:54:03,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:03,494 INFO L93 Difference]: Finished difference Result 283150 states and 377867 transitions. [2020-10-28 14:54:03,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:54:03,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-28 14:54:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:04,098 INFO L225 Difference]: With dead ends: 283150 [2020-10-28 14:54:04,099 INFO L226 Difference]: Without dead ends: 283147 [2020-10-28 14:54:04,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:54:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283147 states. [2020-10-28 14:54:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283147 to 258570. [2020-10-28 14:54:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258570 states. [2020-10-28 14:54:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258570 states to 258570 states and 332808 transitions. [2020-10-28 14:54:09,696 INFO L78 Accepts]: Start accepts. Automaton has 258570 states and 332808 transitions. Word has length 39 [2020-10-28 14:54:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:09,696 INFO L481 AbstractCegarLoop]: Abstraction has 258570 states and 332808 transitions. [2020-10-28 14:54:09,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:54:09,697 INFO L276 IsEmpty]: Start isEmpty. Operand 258570 states and 332808 transitions. [2020-10-28 14:54:10,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:54:10,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:10,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:10,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:54:10,388 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:10,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:10,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1740515738, now seen corresponding path program 1 times [2020-10-28 14:54:10,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:10,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235492287] [2020-10-28 14:54:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:10,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:10,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:10,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:10,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:10,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:54:10,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:54:10,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-28 14:54:10,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:10,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:10,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:54:10,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:54:10,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:54:10,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:10,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:10,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:10,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:10,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:10,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:10,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:10,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:10,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:10,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:10,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235492287] [2020-10-28 14:54:10,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:54:10,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:54:10,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123680244] [2020-10-28 14:54:10,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:54:10,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:10,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:54:10,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:54:10,595 INFO L87 Difference]: Start difference. First operand 258570 states and 332808 transitions. Second operand 4 states. [2020-10-28 14:54:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:13,877 INFO L93 Difference]: Finished difference Result 387086 states and 496651 transitions. [2020-10-28 14:54:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:54:13,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-28 14:54:13,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:14,279 INFO L225 Difference]: With dead ends: 387086 [2020-10-28 14:54:14,279 INFO L226 Difference]: Without dead ends: 260107 [2020-10-28 14:54:14,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:54:14,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260107 states. [2020-10-28 14:54:19,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260107 to 260106. [2020-10-28 14:54:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260106 states. [2020-10-28 14:54:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260106 states to 260106 states and 329736 transitions. [2020-10-28 14:54:19,920 INFO L78 Accepts]: Start accepts. Automaton has 260106 states and 329736 transitions. Word has length 39 [2020-10-28 14:54:19,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:19,921 INFO L481 AbstractCegarLoop]: Abstraction has 260106 states and 329736 transitions. [2020-10-28 14:54:19,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:54:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 260106 states and 329736 transitions. [2020-10-28 14:54:20,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:54:20,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:20,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:20,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:54:20,100 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:20,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2131749732, now seen corresponding path program 1 times [2020-10-28 14:54:20,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:20,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478837464] [2020-10-28 14:54:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:20,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:20,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:20,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:20,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:54:20,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:54:20,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-28 14:54:20,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:20,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:20,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:54:20,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:54:20,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:54:20,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:20,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:20,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:20,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:20,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:20,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:20,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:20,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:20,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:20,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:20,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:20,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:20,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:20,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478837464] [2020-10-28 14:54:20,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:54:20,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:54:20,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546612066] [2020-10-28 14:54:20,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:54:20,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:20,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:54:20,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:54:20,247 INFO L87 Difference]: Start difference. First operand 260106 states and 329736 transitions. Second operand 4 states. [2020-10-28 14:54:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:26,935 INFO L93 Difference]: Finished difference Result 591886 states and 751627 transitions. [2020-10-28 14:54:26,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:54:26,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-28 14:54:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:27,468 INFO L225 Difference]: With dead ends: 591886 [2020-10-28 14:54:27,468 INFO L226 Difference]: Without dead ends: 333835 [2020-10-28 14:54:27,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:54:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333835 states. [2020-10-28 14:54:34,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333835 to 333834. [2020-10-28 14:54:34,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333834 states. [2020-10-28 14:54:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333834 states to 333834 states and 417800 transitions. [2020-10-28 14:54:35,891 INFO L78 Accepts]: Start accepts. Automaton has 333834 states and 417800 transitions. Word has length 39 [2020-10-28 14:54:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:35,891 INFO L481 AbstractCegarLoop]: Abstraction has 333834 states and 417800 transitions. [2020-10-28 14:54:35,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:54:35,891 INFO L276 IsEmpty]: Start isEmpty. Operand 333834 states and 417800 transitions. [2020-10-28 14:54:36,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:54:36,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:36,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:36,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:54:36,095 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:36,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:36,096 INFO L82 PathProgramCache]: Analyzing trace with hash -835398776, now seen corresponding path program 1 times [2020-10-28 14:54:36,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:36,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422585155] [2020-10-28 14:54:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:36,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:36,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:36,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:36,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:36,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:54:36,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:54:36,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-28 14:54:36,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:36,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:54:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 14:54:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:54:36,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:36,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:36,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:36,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:36,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:36,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:36,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:36,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:36,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:36,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:36,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:36,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:36,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:36,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422585155] [2020-10-28 14:54:36,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:54:36,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:54:36,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720159866] [2020-10-28 14:54:36,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:54:36,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:36,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:54:36,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:54:36,323 INFO L87 Difference]: Start difference. First operand 333834 states and 417800 transitions. Second operand 4 states. [2020-10-28 14:54:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:44,359 INFO L93 Difference]: Finished difference Result 550926 states and 692235 transitions. [2020-10-28 14:54:44,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:54:44,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-28 14:54:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:45,481 INFO L225 Difference]: With dead ends: 550926 [2020-10-28 14:54:45,481 INFO L226 Difference]: Without dead ends: 550923 [2020-10-28 14:54:45,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:54:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550923 states. [2020-10-28 14:54:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550923 to 518154. [2020-10-28 14:54:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518154 states. [2020-10-28 14:54:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518154 states to 518154 states and 634888 transitions. [2020-10-28 14:54:56,306 INFO L78 Accepts]: Start accepts. Automaton has 518154 states and 634888 transitions. Word has length 40 [2020-10-28 14:54:56,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:56,307 INFO L481 AbstractCegarLoop]: Abstraction has 518154 states and 634888 transitions. [2020-10-28 14:54:56,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:54:56,307 INFO L276 IsEmpty]: Start isEmpty. Operand 518154 states and 634888 transitions. [2020-10-28 14:54:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:54:56,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:56,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:56,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:54:56,692 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:56,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:56,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1770624778, now seen corresponding path program 1 times [2020-10-28 14:54:56,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:56,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440165261] [2020-10-28 14:54:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:56,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:56,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:56,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:57,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:57,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:54:57,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:54:57,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 686 [2020-10-28 14:54:57,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:57,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:57,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:54:57,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 14:54:57,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:54:57,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:57,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:57,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:57,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:57,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:57,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:57,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:57,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:57,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:57,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:57,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:54:57,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440165261] [2020-10-28 14:54:57,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:54:57,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:54:57,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993501404] [2020-10-28 14:54:57,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:54:57,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:54:57,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:54:57,458 INFO L87 Difference]: Start difference. First operand 518154 states and 634888 transitions. Second operand 4 states. [2020-10-28 14:55:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:05,811 INFO L93 Difference]: Finished difference Result 774158 states and 944139 transitions. [2020-10-28 14:55:05,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:55:05,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-28 14:55:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:07,260 INFO L225 Difference]: With dead ends: 774158 [2020-10-28 14:55:07,261 INFO L226 Difference]: Without dead ends: 520203 [2020-10-28 14:55:07,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:55:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520203 states. [2020-10-28 14:55:16,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520203 to 520202. [2020-10-28 14:55:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520202 states. [2020-10-28 14:55:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520202 states to 520202 states and 626696 transitions. [2020-10-28 14:55:18,348 INFO L78 Accepts]: Start accepts. Automaton has 520202 states and 626696 transitions. Word has length 40 [2020-10-28 14:55:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:18,348 INFO L481 AbstractCegarLoop]: Abstraction has 520202 states and 626696 transitions. [2020-10-28 14:55:18,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:55:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 520202 states and 626696 transitions. [2020-10-28 14:55:19,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:55:19,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:19,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:19,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:55:19,333 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:19,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:19,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2101640692, now seen corresponding path program 1 times [2020-10-28 14:55:19,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:19,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575310552] [2020-10-28 14:55:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:19,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:19,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:19,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:19,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:55:19,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:55:19,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-28 14:55:19,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:19,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:19,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:55:19,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 14:55:19,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:55:19,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:19,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:19,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:19,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:19,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:19,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:19,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:55:19,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:19,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:19,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:19,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:19,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:19,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575310552] [2020-10-28 14:55:19,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:55:19,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:55:19,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532734718] [2020-10-28 14:55:19,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:55:19,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:19,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:55:19,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:55:19,474 INFO L87 Difference]: Start difference. First operand 520202 states and 626696 transitions. Second operand 4 states. [2020-10-28 14:55:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:25,795 INFO L93 Difference]: Finished difference Result 778254 states and 933899 transitions. [2020-10-28 14:55:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:55:25,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-28 14:55:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:26,770 INFO L225 Difference]: With dead ends: 778254 [2020-10-28 14:55:26,770 INFO L226 Difference]: Without dead ends: 524299 [2020-10-28 14:55:26,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:55:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524299 states. [2020-10-28 14:55:39,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524299 to 524298. [2020-10-28 14:55:39,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524298 states. [2020-10-28 14:55:42,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524298 states to 524298 states and 622600 transitions. [2020-10-28 14:55:42,291 INFO L78 Accepts]: Start accepts. Automaton has 524298 states and 622600 transitions. Word has length 40 [2020-10-28 14:55:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:55:42,291 INFO L481 AbstractCegarLoop]: Abstraction has 524298 states and 622600 transitions. [2020-10-28 14:55:42,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:55:42,292 INFO L276 IsEmpty]: Start isEmpty. Operand 524298 states and 622600 transitions. [2020-10-28 14:55:42,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:55:42,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:55:42,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:55:42,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:55:42,905 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:55:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:55:42,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1375678154, now seen corresponding path program 1 times [2020-10-28 14:55:42,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:55:42,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256676847] [2020-10-28 14:55:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:55:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:42,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:42,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:42,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:55:42,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:42,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 14:55:42,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:42,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:42,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:55:42,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 14:55:42,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:55:42,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:43,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:55:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:55:43,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:55:43,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:55:43,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:55:43,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:55:43,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:55:43,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:55:43,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:55:43,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:55:43,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:55:43,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:55:43,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:55:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:55:43,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256676847] [2020-10-28 14:55:43,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:55:43,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:55:43,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534726680] [2020-10-28 14:55:43,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:55:43,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:55:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:55:43,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:55:43,046 INFO L87 Difference]: Start difference. First operand 524298 states and 622600 transitions. Second operand 4 states. [2020-10-28 14:55:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:55:54,809 INFO L93 Difference]: Finished difference Result 1179662 states and 1392651 transitions. [2020-10-28 14:55:54,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:55:54,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-28 14:55:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:55:55,948 INFO L225 Difference]: With dead ends: 1179662 [2020-10-28 14:55:55,948 INFO L226 Difference]: Without dead ends: 663563 [2020-10-28 14:55:56,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:55:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663563 states. [2020-10-28 14:56:10,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663563 to 663562. [2020-10-28 14:56:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663562 states. [2020-10-28 14:56:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663562 states to 663562 states and 770056 transitions. [2020-10-28 14:56:12,397 INFO L78 Accepts]: Start accepts. Automaton has 663562 states and 770056 transitions. Word has length 40 [2020-10-28 14:56:12,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:56:12,397 INFO L481 AbstractCegarLoop]: Abstraction has 663562 states and 770056 transitions. [2020-10-28 14:56:12,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:56:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 663562 states and 770056 transitions. [2020-10-28 14:56:13,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:56:13,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:56:13,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:56:13,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:56:13,659 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:56:13,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:56:13,659 INFO L82 PathProgramCache]: Analyzing trace with hash 520693861, now seen corresponding path program 1 times [2020-10-28 14:56:13,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:56:13,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124386365] [2020-10-28 14:56:13,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:56:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:13,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:13,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:13,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:13,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:56:13,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:56:13,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-28 14:56:13,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:13,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:13,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:56:13,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 14:56:13,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:56:13,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:13,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:56:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:56:13,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:56:13,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:56:13,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:56:13,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:56:13,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:56:13,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:56:13,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:56:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:56:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:56:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:56:13,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:56:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:56:13,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124386365] [2020-10-28 14:56:13,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:56:13,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:56:13,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337145379] [2020-10-28 14:56:13,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:56:13,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:56:13,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:56:13,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:56:13,800 INFO L87 Difference]: Start difference. First operand 663562 states and 770056 transitions. Second operand 4 states.