/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=NARROWEST --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 -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono5_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:59:47,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:59:47,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:59:47,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:59:47,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:59:47,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:59:47,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:59:47,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:59:47,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:59:47,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:59:47,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:59:47,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:59:47,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:59:47,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:59:47,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:59:47,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:59:47,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:59:47,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:59:47,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:59:47,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:59:47,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:59:47,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:59:47,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:59:47,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:59:47,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:59:47,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:59:47,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:59:47,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:59:47,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:59:47,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:59:47,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:59:47,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:59:47,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:59:47,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:59:47,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:59:47,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:59:47,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:59:47,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:59:47,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:59:47,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:59:47,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:59:47,255 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 [2020-10-13 10:59:47,292 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:59:47,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:59:47,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:59:47,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:59:47,294 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:59:47,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:59:47,295 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:59:47,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:59:47,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:59:47,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:59:47,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:59:47,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:59:47,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:59:47,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:59:47,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:59:47,298 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:59:47,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:59:47,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:59:47,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:59:47,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:59:47,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:59:47,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:59:47,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:59:47,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:59:47,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:59:47,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:59:47,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:59:47,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:59:47,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:59:47,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:59:47,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:59:47,658 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:59:47,662 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:59:47,666 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:59:47,666 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:59:47,667 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2020-10-13 10:59:47,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd9a6a9ea/5e26b16a3d554f6783c2fb5955f79fb0/FLAG67b427882 [2020-10-13 10:59:48,187 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:59:48,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2020-10-13 10:59:48,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd9a6a9ea/5e26b16a3d554f6783c2fb5955f79fb0/FLAG67b427882 [2020-10-13 10:59:48,573 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd9a6a9ea/5e26b16a3d554f6783c2fb5955f79fb0 [2020-10-13 10:59:48,585 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:59:48,587 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:59:48,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:59:48,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:59:48,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:59:48,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:48" (1/1) ... [2020-10-13 10:59:48,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424943e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:48, skipping insertion in model container [2020-10-13 10:59:48,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:48" (1/1) ... [2020-10-13 10:59:48,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:59:48,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:59:48,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:59:48,823 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:59:48,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:59:48,847 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:59:48,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:48 WrapperNode [2020-10-13 10:59:48,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:59:48,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:59:48,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:59:48,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:59:48,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:48" (1/1) ... [2020-10-13 10:59:48,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:48" (1/1) ... [2020-10-13 10:59:48,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:48" (1/1) ... [2020-10-13 10:59:48,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:48" (1/1) ... [2020-10-13 10:59:48,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:48" (1/1) ... [2020-10-13 10:59:48,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:48" (1/1) ... [2020-10-13 10:59:48,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:48" (1/1) ... [2020-10-13 10:59:48,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:59:48,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:59:48,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:59:48,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:59:48,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:48" (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 [2020-10-13 10:59:49,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:59:49,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:59:49,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:59:49,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:59:49,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:59:49,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:59:49,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:59:49,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:59:49,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:59:49,175 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:59:49,176 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:59:49,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:49 BoogieIcfgContainer [2020-10-13 10:59:49,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:59:49,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:59:49,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:59:49,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:59:49,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:59:48" (1/3) ... [2020-10-13 10:59:49,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5e3691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:49, skipping insertion in model container [2020-10-13 10:59:49,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:48" (2/3) ... [2020-10-13 10:59:49,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5e3691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:49, skipping insertion in model container [2020-10-13 10:59:49,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:49" (3/3) ... [2020-10-13 10:59:49,188 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono5_1.c [2020-10-13 10:59:49,198 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:59:49,205 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:59:49,219 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:59:49,239 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:59:49,239 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:59:49,239 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:59:49,240 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:59:49,240 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:59:49,240 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:59:49,240 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:59:49,240 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:59:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-13 10:59:49,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:59:49,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:49,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:49,262 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:49,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:49,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2020-10-13 10:59:49,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:49,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403353602] [2020-10-13 10:59:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:49,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:49,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:49,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:49,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:59:49,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:49,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-13 10:59:49,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:49,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:49,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:59:49,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:49,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:59:49,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:49,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:49,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:49,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:49,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:49,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:59:49,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:49,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:49,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403353602] [2020-10-13 10:59:49,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:59:49,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:59:49,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073887300] [2020-10-13 10:59:49,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:59:49,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:49,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:59:49,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:59:49,563 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-10-13 10:59:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:49,583 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-13 10:59:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:59:49,584 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-13 10:59:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:49,591 INFO L225 Difference]: With dead ends: 30 [2020-10-13 10:59:49,591 INFO L226 Difference]: Without dead ends: 13 [2020-10-13 10:59:49,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:59:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-13 10:59:49,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-13 10:59:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 10:59:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-13 10:59:49,628 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-13 10:59:49,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:49,628 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-13 10:59:49,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:59:49,628 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-13 10:59:49,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:59:49,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:49,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:49,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:59:49,629 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:49,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:49,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2020-10-13 10:59:49,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:49,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447543008] [2020-10-13 10:59:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:49,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:49,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:49,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:49,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:59:49,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:49,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-13 10:59:49,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:49,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:59:49,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:49,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:59:49,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:50,049 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 10 [2020-10-13 10:59:50,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:50,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:50,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:50,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:50,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:59:50,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:50,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:50,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:50,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:50,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:50,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447543008] [2020-10-13 10:59:50,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:59:50,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:59:50,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761778132] [2020-10-13 10:59:50,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:59:50,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:50,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:59:50,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:50,064 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-10-13 10:59:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:50,092 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-13 10:59:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:59:50,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:59:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:50,094 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:59:50,094 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:59:50,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:50,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:59:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-13 10:59:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:59:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-13 10:59:50,100 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-13 10:59:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:50,101 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-13 10:59:50,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:59:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-13 10:59:50,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:59:50,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:50,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:50,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:59:50,102 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:50,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:50,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1264308876, now seen corresponding path program 1 times [2020-10-13 10:59:50,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:50,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857742144] [2020-10-13 10:59:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:50,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:50,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:59:50,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:50,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-13 10:59:50,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:50,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:59:50,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:50,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:59:50,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:50,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:50,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:50,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:50,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:50,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:50,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:50,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:50,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:50,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:50,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:50,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857742144] [2020-10-13 10:59:50,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:59:50,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:59:50,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912810427] [2020-10-13 10:59:50,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:59:50,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:50,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:59:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:50,351 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-13 10:59:50,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:50,379 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-13 10:59:50,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:59:50,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 10:59:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:50,381 INFO L225 Difference]: With dead ends: 24 [2020-10-13 10:59:50,381 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:59:50,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:59:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:59:50,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-13 10:59:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:59:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-13 10:59:50,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-10-13 10:59:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:50,391 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-13 10:59:50,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:59:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-13 10:59:50,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:59:50,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:50,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:50,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:59:50,393 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:50,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:50,394 INFO L82 PathProgramCache]: Analyzing trace with hash 510698486, now seen corresponding path program 1 times [2020-10-13 10:59:50,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:50,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372837455] [2020-10-13 10:59:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:50,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:50,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:59:50,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:50,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-13 10:59:50,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:50,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:59:50,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:50,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:59:50,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:50,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:50,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:50,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:50,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:50,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:50,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:50,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:50,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:50,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:50,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:50,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372837455] [2020-10-13 10:59:50,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:50,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:59:50,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159595149] [2020-10-13 10:59:50,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:59:50,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:50,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:59:50,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:50,698 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-13 10:59:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:50,738 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-13 10:59:50,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:59:50,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-13 10:59:50,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:50,740 INFO L225 Difference]: With dead ends: 24 [2020-10-13 10:59:50,740 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 10:59:50,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:50,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 10:59:50,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-13 10:59:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:59:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-13 10:59:50,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-10-13 10:59:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:50,747 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-13 10:59:50,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:59:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-13 10:59:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:59:50,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:50,748 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:50,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:59:50,749 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:50,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:50,749 INFO L82 PathProgramCache]: Analyzing trace with hash -265742635, now seen corresponding path program 1 times [2020-10-13 10:59:50,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:50,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036699848] [2020-10-13 10:59:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:50,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:50,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:59:50,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:50,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-13 10:59:50,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:50,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:59:50,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:50,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:59:50,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:50,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:50,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:50,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:50,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:50,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:50,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:50,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:50,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:50,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:50,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:50,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:50,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036699848] [2020-10-13 10:59:50,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:50,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:59:50,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022413347] [2020-10-13 10:59:50,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:59:50,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:50,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:59:50,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:50,945 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-10-13 10:59:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:50,974 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-13 10:59:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:59:50,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 10:59:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:50,975 INFO L225 Difference]: With dead ends: 27 [2020-10-13 10:59:50,975 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 10:59:50,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:59:50,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 10:59:50,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-13 10:59:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 10:59:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-13 10:59:50,981 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-13 10:59:50,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:50,982 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-13 10:59:50,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:59:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-13 10:59:50,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:59:50,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:50,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:50,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:59:50,984 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:50,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:50,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1509264727, now seen corresponding path program 2 times [2020-10-13 10:59:50,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:50,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671956746] [2020-10-13 10:59:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:50,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:51,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:59:51,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:59:51,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-13 10:59:51,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:59:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:59:51,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:51,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:51,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:51,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:51,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:51,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:51,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:51,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:51,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:51,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:51,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671956746] [2020-10-13 10:59:51,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:51,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:59:51,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155390146] [2020-10-13 10:59:51,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:59:51,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:51,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:59:51,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:59:51,260 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-10-13 10:59:51,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:51,309 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-13 10:59:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:59:51,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-13 10:59:51,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:51,311 INFO L225 Difference]: With dead ends: 27 [2020-10-13 10:59:51,311 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:59:51,312 INFO L675 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 [2020-10-13 10:59:51,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:59:51,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-13 10:59:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 10:59:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-13 10:59:51,318 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-10-13 10:59:51,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:51,318 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-13 10:59:51,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:59:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-13 10:59:51,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:59:51,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:51,320 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:51,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:59:51,320 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:51,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:51,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650900, now seen corresponding path program 2 times [2020-10-13 10:59:51,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:51,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735503322] [2020-10-13 10:59:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:51,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:51,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:59:51,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:59:51,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-13 10:59:51,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:51,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:59:51,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:51,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:59:51,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:51,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:51,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:51,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:51,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:51,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:51,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:51,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:51,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:51,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:59:51,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735503322] [2020-10-13 10:59:51,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:51,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:59:51,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129396313] [2020-10-13 10:59:51,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:59:51,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:51,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:59:51,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:59:51,728 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-10-13 10:59:51,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:51,764 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-13 10:59:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:59:51,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-13 10:59:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:51,765 INFO L225 Difference]: With dead ends: 30 [2020-10-13 10:59:51,766 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:59:51,766 INFO L675 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 [2020-10-13 10:59:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:59:51,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-13 10:59:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:59:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-13 10:59:51,771 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-13 10:59:51,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:51,772 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-13 10:59:51,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:59:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-13 10:59:51,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:59:51,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:51,773 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:51,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:59:51,773 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:51,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:51,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309034, now seen corresponding path program 3 times [2020-10-13 10:59:51,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:51,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867815074] [2020-10-13 10:59:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:51,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:51,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:52,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:52,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:59:52,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:59:52,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-13 10:59:52,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:52,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:59:52,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:52,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:59:52,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:59:52,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:52,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:52,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:52,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:52,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:52,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:52,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:52,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:52,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:52,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:52,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:59:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:59:52,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867815074] [2020-10-13 10:59:52,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:52,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:59:52,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967968954] [2020-10-13 10:59:52,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:59:52,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:52,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:59:52,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:59:52,354 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-10-13 10:59:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:54,657 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-13 10:59:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:59:54,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 10:59:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:54,659 INFO L225 Difference]: With dead ends: 34 [2020-10-13 10:59:54,659 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:59:54,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:59:54,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:59:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-13 10:59:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:59:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-13 10:59:54,670 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2020-10-13 10:59:54,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:54,671 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-13 10:59:54,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:59:54,672 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-13 10:59:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:59:54,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:54,673 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:54,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:59:54,675 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:54,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:54,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1478259702, now seen corresponding path program 3 times [2020-10-13 10:59:54,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:54,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546423603] [2020-10-13 10:59:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:54,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:54,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:54,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:54,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:54,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:55,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:56,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:56,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:59:56,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:59:56,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1830 [2020-10-13 10:59:56,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:56,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:59:56,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:56,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:59:56,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:56,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:56,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:56,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:56,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:56,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:56,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:59:56,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:56,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:56,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:56,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:56,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:59:56,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546423603] [2020-10-13 10:59:56,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:56,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:59:56,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539779144] [2020-10-13 10:59:56,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:59:56,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:56,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:59:56,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:59:56,618 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2020-10-13 10:59:56,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:56,686 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-13 10:59:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:59:56,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-13 10:59:56,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:56,688 INFO L225 Difference]: With dead ends: 43 [2020-10-13 10:59:56,688 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 10:59:56,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:59:56,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 10:59:56,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 10:59:56,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:59:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 10:59:56,696 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2020-10-13 10:59:56,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:56,698 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 10:59:56,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:59:56,699 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 10:59:56,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:59:56,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:56,700 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:56,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:59:56,700 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:56,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:56,701 INFO L82 PathProgramCache]: Analyzing trace with hash 238113751, now seen corresponding path program 4 times [2020-10-13 10:59:56,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:56,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78098032] [2020-10-13 10:59:56,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:56,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:56,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:56,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:56,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:56,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:56,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:56,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:59,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:59:59,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:59:59,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2643 [2020-10-13 10:59:59,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:59,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:59:59,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:59:59,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:59:59,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:59,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:59,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:59,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:59,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:59,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:59:59,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:59,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:59,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:59,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:59,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:59:59,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78098032] [2020-10-13 10:59:59,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:59,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:59:59,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237331523] [2020-10-13 10:59:59,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:59:59,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:59,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:59:59,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:59:59,464 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-10-13 10:59:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:59,556 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-13 10:59:59,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:59:59,557 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 10:59:59,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:59,557 INFO L225 Difference]: With dead ends: 46 [2020-10-13 10:59:59,558 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 10:59:59,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:59:59,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 10:59:59,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 10:59:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 10:59:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 10:59:59,570 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2020-10-13 10:59:59,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:59,570 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 10:59:59,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:59:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 10:59:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:59:59,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:59,573 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:59,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:59:59,573 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:59,574 INFO L82 PathProgramCache]: Analyzing trace with hash 358767702, now seen corresponding path program 5 times [2020-10-13 10:59:59,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:59,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191203789] [2020-10-13 10:59:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:59,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:59,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:00,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:01,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:03,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 11:00:03,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 11:00:03,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3701 [2020-10-13 11:00:03,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:03,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:00:03,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:03,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:00:03,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:03,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:03,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:03,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:03,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:03,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:00:03,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:03,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:03,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:03,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:03,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:03,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191203789] [2020-10-13 11:00:03,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:03,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:00:03,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009758202] [2020-10-13 11:00:03,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:00:03,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:03,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:00:03,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:00:03,419 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2020-10-13 11:00:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:03,536 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-13 11:00:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:00:03,537 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-13 11:00:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:03,538 INFO L225 Difference]: With dead ends: 49 [2020-10-13 11:00:03,538 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 11:00:03,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:00:03,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 11:00:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-13 11:00:03,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 11:00:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-13 11:00:03,545 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2020-10-13 11:00:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:03,545 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-13 11:00:03,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:00:03,545 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-13 11:00:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 11:00:03,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:03,547 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:03,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 11:00:03,547 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:03,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:03,548 INFO L82 PathProgramCache]: Analyzing trace with hash -127004809, now seen corresponding path program 6 times [2020-10-13 11:00:03,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:03,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251350110] [2020-10-13 11:00:03,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:03,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:03,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:04,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:07,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 11:00:07,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 11:00:07,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3545 [2020-10-13 11:00:07,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:07,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:00:07,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:07,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:00:07,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:07,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:07,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:07,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:07,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:07,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:07,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:07,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:07,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:07,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:07,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:07,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251350110] [2020-10-13 11:00:07,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:07,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:00:07,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089750483] [2020-10-13 11:00:07,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:00:07,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:07,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:00:07,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:00:07,245 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 9 states. [2020-10-13 11:00:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:07,414 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-10-13 11:00:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:00:07,416 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-13 11:00:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:07,417 INFO L225 Difference]: With dead ends: 52 [2020-10-13 11:00:07,417 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 11:00:07,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:00:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 11:00:07,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-13 11:00:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 11:00:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-13 11:00:07,430 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2020-10-13 11:00:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:07,432 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-13 11:00:07,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:00:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-13 11:00:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 11:00:07,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:07,433 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:07,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 11:00:07,434 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:07,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:07,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2031059786, now seen corresponding path program 7 times [2020-10-13 11:00:07,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:07,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090174826] [2020-10-13 11:00:07,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:07,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:07,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:08,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:08,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:09,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:12,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:12,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 11:00:12,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 11:00:12,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:00:12,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:12,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 11:00:12,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:12,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:00:12,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:12,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:12,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:12,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:12,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:12,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:12,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:12,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:12,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:12,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:12,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:12,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:12,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090174826] [2020-10-13 11:00:12,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:12,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:00:12,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077998556] [2020-10-13 11:00:12,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:00:12,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:12,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:00:12,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:00:12,645 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 10 states. [2020-10-13 11:00:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:12,820 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-10-13 11:00:12,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:00:12,821 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-13 11:00:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:12,822 INFO L225 Difference]: With dead ends: 55 [2020-10-13 11:00:12,822 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 11:00:12,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:00:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 11:00:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 11:00:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 11:00:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-13 11:00:12,828 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-10-13 11:00:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:12,829 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-13 11:00:12,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:00:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-13 11:00:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:00:12,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:12,830 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:12,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 11:00:12,831 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:12,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:12,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2099801321, now seen corresponding path program 8 times [2020-10-13 11:00:12,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:12,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730392800] [2020-10-13 11:00:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:12,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:12,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:12,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:12,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:12,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:13,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:13,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:13,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:13,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:13,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:15,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:17,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:17,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 11:00:17,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 11:00:17,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:00:17,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:17,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:00:17,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:17,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 11:00:17,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:00:18,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:18,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:18,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:18,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:18,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:18,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:18,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:18,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:18,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:18,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:18,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:18,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730392800] [2020-10-13 11:00:18,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:18,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:00:18,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559056309] [2020-10-13 11:00:18,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:00:18,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:18,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:00:18,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:00:18,096 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 11 states. [2020-10-13 11:00:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:18,416 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-13 11:00:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:00:18,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-13 11:00:18,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:18,420 INFO L225 Difference]: With dead ends: 58 [2020-10-13 11:00:18,420 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 11:00:18,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:00:18,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 11:00:18,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 11:00:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 11:00:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 11:00:18,437 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 40 [2020-10-13 11:00:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:18,438 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 11:00:18,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:00:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 11:00:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 11:00:18,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:18,442 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:18,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 11:00:18,442 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:18,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1279470314, now seen corresponding path program 9 times [2020-10-13 11:00:18,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:18,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941518013] [2020-10-13 11:00:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:18,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:18,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:18,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:18,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:18,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:19,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:19,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:19,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:19,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:19,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:19,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:21,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:23,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:23,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 11:00:23,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 11:00:23,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 11:00:23,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:23,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 11:00:23,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:23,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 11:00:23,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:23,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:23,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:23,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:23,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:23,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:23,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:23,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:23,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:23,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:23,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:23,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 48 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:23,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941518013] [2020-10-13 11:00:23,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:23,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 11:00:23,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685272923] [2020-10-13 11:00:23,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 11:00:23,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:23,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 11:00:23,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:00:23,655 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-10-13 11:00:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:23,897 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-10-13 11:00:23,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 11:00:23,899 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-13 11:00:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:23,900 INFO L225 Difference]: With dead ends: 61 [2020-10-13 11:00:23,901 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 11:00:23,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:00:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 11:00:23,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-13 11:00:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 11:00:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-13 11:00:23,921 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2020-10-13 11:00:23,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:23,921 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-13 11:00:23,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 11:00:23,922 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-13 11:00:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 11:00:23,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:23,925 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:23,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 11:00:23,925 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:23,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:23,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1162355017, now seen corresponding path program 10 times [2020-10-13 11:00:23,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:23,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562121403] [2020-10-13 11:00:23,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:23,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:23,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:24,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:24,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:24,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:24,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:24,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:24,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:24,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:24,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:25,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:25,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:26,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:28,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:28,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 11:00:28,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 11:00:28,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:00:28,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:28,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:00:28,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:28,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 11:00:28,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:29,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:29,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:29,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:29,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:29,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:29,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:29,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:29,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:29,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:29,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:29,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 53 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:29,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562121403] [2020-10-13 11:00:29,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:29,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:00:29,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358099862] [2020-10-13 11:00:29,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:00:29,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:29,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:00:29,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:00:29,146 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 13 states. [2020-10-13 11:00:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:29,411 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-10-13 11:00:29,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 11:00:29,411 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-13 11:00:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:29,412 INFO L225 Difference]: With dead ends: 64 [2020-10-13 11:00:29,412 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 11:00:29,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:00:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 11:00:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-13 11:00:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 11:00:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-13 11:00:29,425 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-10-13 11:00:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:29,425 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-13 11:00:29,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:00:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-13 11:00:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 11:00:29,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:29,426 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:29,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 11:00:29,427 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:29,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:29,429 INFO L82 PathProgramCache]: Analyzing trace with hash 306013558, now seen corresponding path program 11 times [2020-10-13 11:00:29,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:29,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771340003] [2020-10-13 11:00:29,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:29,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:29,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:29,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:29,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:29,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:29,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:29,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:29,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:29,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:29,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:29,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:30,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:30,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:32,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:34,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:34,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 11:00:34,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 11:00:34,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 11:00:34,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:34,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:00:34,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:34,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 11:00:34,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 11:00:34,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:34,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:34,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:34,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:34,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:34,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:34,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:34,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:34,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:34,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:34,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 58 proven. 187 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:34,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771340003] [2020-10-13 11:00:34,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:34,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 11:00:34,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125270201] [2020-10-13 11:00:34,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 11:00:34,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:34,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 11:00:34,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:00:34,674 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 14 states. [2020-10-13 11:00:35,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:35,024 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2020-10-13 11:00:35,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:00:35,030 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-13 11:00:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:35,031 INFO L225 Difference]: With dead ends: 67 [2020-10-13 11:00:35,031 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 11:00:35,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:00:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 11:00:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-13 11:00:35,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 11:00:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-13 11:00:35,038 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2020-10-13 11:00:35,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:35,039 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-13 11:00:35,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 11:00:35,039 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-13 11:00:35,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:00:35,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:35,040 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:35,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 11:00:35,040 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:35,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:35,041 INFO L82 PathProgramCache]: Analyzing trace with hash 232321623, now seen corresponding path program 12 times [2020-10-13 11:00:35,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:35,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460313902] [2020-10-13 11:00:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:35,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:35,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:35,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:35,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:35,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:35,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:35,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:35,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:35,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:35,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:35,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:35,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:36,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:38,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:40,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:40,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 11:00:40,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 11:00:40,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:00:40,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:40,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:00:40,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:40,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 11:00:40,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:40,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:40,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:40,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:40,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:40,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:40,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:40,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:40,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:40,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:40,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:40,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 63 proven. 222 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:40,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460313902] [2020-10-13 11:00:40,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:40,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 11:00:40,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534088713] [2020-10-13 11:00:40,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 11:00:40,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:40,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 11:00:40,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:00:40,324 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 15 states. [2020-10-13 11:00:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:40,749 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-10-13 11:00:40,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 11:00:40,754 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-13 11:00:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:40,755 INFO L225 Difference]: With dead ends: 70 [2020-10-13 11:00:40,755 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 11:00:40,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:00:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 11:00:40,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 11:00:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 11:00:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-13 11:00:40,765 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-10-13 11:00:40,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:40,766 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-13 11:00:40,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 11:00:40,766 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-13 11:00:40,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 11:00:40,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:40,767 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:40,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 11:00:40,767 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:40,768 INFO L82 PathProgramCache]: Analyzing trace with hash -395825706, now seen corresponding path program 13 times [2020-10-13 11:00:40,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:40,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903546921] [2020-10-13 11:00:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:40,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:40,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:40,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:40,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:40,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:40,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:40,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:40,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:41,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:41,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:41,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:41,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:41,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:41,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:41,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:45,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:45,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:45,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 11:00:45,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 11:00:45,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:00:45,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:45,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:00:45,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:45,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 11:00:45,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:46,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:46,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:46,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:46,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:46,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:46,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:46,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:46,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:46,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:46,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:46,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 68 proven. 260 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:46,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903546921] [2020-10-13 11:00:46,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:46,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 11:00:46,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751718066] [2020-10-13 11:00:46,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 11:00:46,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:46,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 11:00:46,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:00:46,098 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 16 states. [2020-10-13 11:00:46,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:46,591 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-10-13 11:00:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 11:00:46,592 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-13 11:00:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:46,593 INFO L225 Difference]: With dead ends: 73 [2020-10-13 11:00:46,593 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 11:00:46,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:00:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 11:00:46,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-13 11:00:46,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 11:00:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-13 11:00:46,601 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2020-10-13 11:00:46,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:46,601 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-13 11:00:46,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 11:00:46,601 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-13 11:00:46,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 11:00:46,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:46,602 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:46,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 11:00:46,603 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:46,603 INFO L82 PathProgramCache]: Analyzing trace with hash -360395273, now seen corresponding path program 14 times [2020-10-13 11:00:46,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:46,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247020207] [2020-10-13 11:00:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:46,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:46,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:46,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:46,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:46,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:46,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:46,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:46,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:46,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:47,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:47,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:47,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:47,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:48,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:48,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:49,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:51,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:51,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:51,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 11:00:51,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 11:00:51,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:00:51,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:51,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:00:51,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:51,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 11:00:51,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:51,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:51,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:51,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:51,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:51,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:51,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:00:51,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:51,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 73 proven. 301 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:51,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247020207] [2020-10-13 11:00:51,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:51,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:00:51,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823499505] [2020-10-13 11:00:51,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:00:51,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:51,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:00:51,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:00:51,923 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 17 states. [2020-10-13 11:00:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:52,422 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-10-13 11:00:52,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 11:00:52,422 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-13 11:00:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:52,423 INFO L225 Difference]: With dead ends: 76 [2020-10-13 11:00:52,423 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 11:00:52,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:00:52,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 11:00:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-13 11:00:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 11:00:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-13 11:00:52,434 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 58 [2020-10-13 11:00:52,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:52,435 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-13 11:00:52,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:00:52,435 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-13 11:00:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 11:00:52,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:52,436 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:52,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 11:00:52,436 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:52,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1414320586, now seen corresponding path program 15 times [2020-10-13 11:00:52,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:52,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006639078] [2020-10-13 11:00:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:52,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:52,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:52,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:53,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:54,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:54,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:57,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:57,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 11:00:57,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 11:00:57,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:00:57,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:00:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:00:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 11:00:57,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:57,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:00:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:57,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:57,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:00:57,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:00:57,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:00:57,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:00:57,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:00:57,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:00:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:00:57,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:00:57,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:00:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 78 proven. 345 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:00:57,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006639078] [2020-10-13 11:00:57,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:00:57,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 11:00:57,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906597619] [2020-10-13 11:00:57,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 11:00:57,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:00:57,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 11:00:57,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:00:57,788 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 18 states. [2020-10-13 11:00:58,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:00:58,397 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-10-13 11:00:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 11:00:58,402 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-13 11:00:58,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:00:58,403 INFO L225 Difference]: With dead ends: 79 [2020-10-13 11:00:58,403 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 11:00:58,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:00:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 11:00:58,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-13 11:00:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 11:00:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-13 11:00:58,415 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 61 [2020-10-13 11:00:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:00:58,416 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-13 11:00:58,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 11:00:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-13 11:00:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 11:00:58,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:00:58,418 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:00:58,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 11:00:58,418 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:00:58,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:00:58,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1602580887, now seen corresponding path program 16 times [2020-10-13 11:00:58,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:00:58,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169343219] [2020-10-13 11:00:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:00:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:00:58,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:58,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:58,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:58,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:58,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:58,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:58,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:58,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:58,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:59,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:59,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:59,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:59,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:59,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:59,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:00:59,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:01,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:01,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:03,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:03,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:01:03,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:01:03,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:01:03,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:01:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 11:01:03,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:03,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:03,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:03,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:03,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:03,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:03,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:03,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:03,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:03,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:03,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:03,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 83 proven. 392 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:03,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169343219] [2020-10-13 11:01:03,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:03,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 11:01:03,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783220354] [2020-10-13 11:01:03,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 11:01:03,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:03,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 11:01:03,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:01:03,810 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 19 states. [2020-10-13 11:01:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:04,472 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-10-13 11:01:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 11:01:04,475 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2020-10-13 11:01:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:04,476 INFO L225 Difference]: With dead ends: 82 [2020-10-13 11:01:04,476 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 11:01:04,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:01:04,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 11:01:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 11:01:04,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 11:01:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-13 11:01:04,483 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2020-10-13 11:01:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:04,483 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-13 11:01:04,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 11:01:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-13 11:01:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 11:01:04,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:04,484 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:04,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 11:01:04,485 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:04,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1628726934, now seen corresponding path program 17 times [2020-10-13 11:01:04,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:04,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680889561] [2020-10-13 11:01:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:04,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:04,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:04,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:04,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:04,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:04,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:04,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:04,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:05,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:06,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:09,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:09,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:09,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 11:01:09,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 11:01:09,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:01:09,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:09,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 11:01:09,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:09,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 11:01:09,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:10,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:10,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:10,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:10,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:10,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:10,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:10,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:10,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:10,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:10,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:01:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 88 proven. 442 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:10,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680889561] [2020-10-13 11:01:10,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:10,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 11:01:10,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68653053] [2020-10-13 11:01:10,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 11:01:10,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:10,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 11:01:10,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:01:10,065 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 20 states. [2020-10-13 11:01:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:10,868 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2020-10-13 11:01:10,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 11:01:10,869 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-10-13 11:01:10,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:10,870 INFO L225 Difference]: With dead ends: 85 [2020-10-13 11:01:10,870 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 11:01:10,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:01:10,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 11:01:10,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-13 11:01:10,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 11:01:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-13 11:01:10,876 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2020-10-13 11:01:10,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:10,877 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-13 11:01:10,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 11:01:10,877 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-13 11:01:10,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 11:01:10,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:10,878 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:10,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 11:01:10,878 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:10,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:10,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1138434761, now seen corresponding path program 18 times [2020-10-13 11:01:10,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:10,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511856424] [2020-10-13 11:01:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:10,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:10,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:11,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:12,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:12,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:12,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:12,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:12,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:13,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:13,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:15,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:15,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 11:01:15,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 11:01:15,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:01:15,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:15,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 11:01:15,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:15,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 11:01:15,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:16,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:16,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:16,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:16,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:16,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:16,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:16,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:16,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:16,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:16,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:16,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 93 proven. 495 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:16,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511856424] [2020-10-13 11:01:16,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:16,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 11:01:16,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350928801] [2020-10-13 11:01:16,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 11:01:16,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:16,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 11:01:16,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:01:16,339 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 21 states. [2020-10-13 11:01:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:17,167 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2020-10-13 11:01:17,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 11:01:17,169 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2020-10-13 11:01:17,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:17,170 INFO L225 Difference]: With dead ends: 88 [2020-10-13 11:01:17,170 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 11:01:17,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:01:17,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 11:01:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-13 11:01:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 11:01:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-13 11:01:17,178 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-10-13 11:01:17,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:17,179 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-13 11:01:17,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 11:01:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-13 11:01:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 11:01:17,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:17,181 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:17,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 11:01:17,184 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:17,184 INFO L82 PathProgramCache]: Analyzing trace with hash -50211082, now seen corresponding path program 19 times [2020-10-13 11:01:17,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:17,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228706705] [2020-10-13 11:01:17,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:17,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:17,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:17,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:18,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:22,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:22,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 11:01:22,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 11:01:22,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:01:22,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 11:01:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 11:01:22,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:22,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:22,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:22,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:22,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:22,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:22,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:22,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:22,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:22,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:22,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:22,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 98 proven. 551 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:22,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228706705] [2020-10-13 11:01:22,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:22,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 11:01:22,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36007548] [2020-10-13 11:01:22,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 11:01:22,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:22,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 11:01:22,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:01:22,665 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 22 states. [2020-10-13 11:01:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:23,536 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-10-13 11:01:23,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 11:01:23,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2020-10-13 11:01:23,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:23,537 INFO L225 Difference]: With dead ends: 91 [2020-10-13 11:01:23,538 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 11:01:23,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:01:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 11:01:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-13 11:01:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 11:01:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-13 11:01:23,548 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2020-10-13 11:01:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:23,548 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-13 11:01:23,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 11:01:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-13 11:01:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 11:01:23,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:23,549 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:23,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 11:01:23,549 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:23,550 INFO L82 PathProgramCache]: Analyzing trace with hash 808259799, now seen corresponding path program 20 times [2020-10-13 11:01:23,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:23,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809790573] [2020-10-13 11:01:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:23,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:23,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:24,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:25,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:25,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:25,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:25,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:26,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:26,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:26,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:28,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:28,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 11:01:28,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-13 11:01:28,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 11:01:28,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:28,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 11:01:28,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:28,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 11:01:28,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:29,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:29,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:29,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:29,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:29,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:29,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:01:29,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:29,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:29,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:29,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:29,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 103 proven. 610 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:29,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809790573] [2020-10-13 11:01:29,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:29,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 11:01:29,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949390056] [2020-10-13 11:01:29,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 11:01:29,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:29,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 11:01:29,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:01:29,068 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 23 states. [2020-10-13 11:01:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:30,020 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-10-13 11:01:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:01:30,021 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 76 [2020-10-13 11:01:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:30,022 INFO L225 Difference]: With dead ends: 94 [2020-10-13 11:01:30,022 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 11:01:30,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-13 11:01:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 11:01:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-13 11:01:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 11:01:30,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-13 11:01:30,029 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-10-13 11:01:30,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:30,029 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-13 11:01:30,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 11:01:30,030 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-13 11:01:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 11:01:30,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:30,030 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:30,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 11:01:30,031 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:30,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:30,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1015972010, now seen corresponding path program 21 times [2020-10-13 11:01:30,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:30,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48880787] [2020-10-13 11:01:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:30,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:30,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:31,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:31,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:31,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:31,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:33,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:33,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:33,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:33,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:33,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:34,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:34,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:35,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:35,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 11:01:35,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 11:01:35,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:01:35,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:35,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 11:01:35,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:35,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 11:01:35,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:35,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:35,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:35,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:35,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:35,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:35,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:35,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:35,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:35,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:35,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:35,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 108 proven. 672 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:35,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48880787] [2020-10-13 11:01:35,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:35,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 11:01:35,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790259941] [2020-10-13 11:01:35,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 11:01:35,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:35,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 11:01:35,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:01:35,585 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 24 states. [2020-10-13 11:01:36,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:36,606 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2020-10-13 11:01:36,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 11:01:36,606 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2020-10-13 11:01:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:36,608 INFO L225 Difference]: With dead ends: 97 [2020-10-13 11:01:36,608 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 11:01:36,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-13 11:01:36,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 11:01:36,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-13 11:01:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 11:01:36,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-13 11:01:36,614 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-10-13 11:01:36,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:36,615 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-13 11:01:36,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 11:01:36,615 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-13 11:01:36,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 11:01:36,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:36,616 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:36,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 11:01:36,616 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:36,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:36,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1810369655, now seen corresponding path program 22 times [2020-10-13 11:01:36,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:36,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546093448] [2020-10-13 11:01:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:36,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:36,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:37,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:39,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:39,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:41,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:41,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 11:01:41,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:01:41,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 11:01:41,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:41,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 11:01:41,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:41,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 11:01:41,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:42,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:42,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:42,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:42,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:42,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:42,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:01:42,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:42,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:42,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 113 proven. 737 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:42,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546093448] [2020-10-13 11:01:42,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:42,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 11:01:42,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840040] [2020-10-13 11:01:42,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 11:01:42,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:42,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 11:01:42,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:01:42,202 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 25 states. [2020-10-13 11:01:43,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:43,347 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2020-10-13 11:01:43,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 11:01:43,348 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 82 [2020-10-13 11:01:43,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:43,349 INFO L225 Difference]: With dead ends: 100 [2020-10-13 11:01:43,350 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 11:01:43,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:01:43,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 11:01:43,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-13 11:01:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 11:01:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-13 11:01:43,356 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2020-10-13 11:01:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:43,357 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-13 11:01:43,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 11:01:43,357 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-13 11:01:43,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 11:01:43,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:43,358 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:43,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 11:01:43,358 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:43,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:43,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1478926410, now seen corresponding path program 23 times [2020-10-13 11:01:43,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:43,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345984155] [2020-10-13 11:01:43,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:43,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:43,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:44,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:44,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:44,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:44,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:44,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:45,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:45,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:45,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:45,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:45,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:46,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:48,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:48,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 11:01:48,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:01:48,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:01:48,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:48,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 11:01:48,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:48,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 11:01:48,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:49,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:49,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:49,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:49,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:49,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:49,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:01:49,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:49,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 118 proven. 805 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:01:49,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345984155] [2020-10-13 11:01:49,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:49,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 11:01:49,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591728819] [2020-10-13 11:01:49,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 11:01:49,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:49,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 11:01:49,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:01:49,024 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 26 states. [2020-10-13 11:01:50,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:01:50,264 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-10-13 11:01:50,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 11:01:50,265 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 85 [2020-10-13 11:01:50,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:01:50,266 INFO L225 Difference]: With dead ends: 103 [2020-10-13 11:01:50,266 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 11:01:50,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-10-13 11:01:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 11:01:50,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-13 11:01:50,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 11:01:50,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-13 11:01:50,272 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 85 [2020-10-13 11:01:50,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:01:50,272 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-13 11:01:50,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 11:01:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-13 11:01:50,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 11:01:50,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:01:50,273 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:01:50,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 11:01:50,274 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:01:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:01:50,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1075826711, now seen corresponding path program 24 times [2020-10-13 11:01:50,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:01:50,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96380179] [2020-10-13 11:01:50,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:01:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:50,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:50,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:50,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:50,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:50,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:50,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:50,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:50,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:50,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:50,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:50,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:51,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:51,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:51,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:52,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:52,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:55,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:55,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 11:01:55,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 11:01:55,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 11:01:55,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:55,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 11:01:55,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:01:55,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 11:01:55,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:58,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:01:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:01:58,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:01:58,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:01:58,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:01:58,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:01:58,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:01:58,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:01:58,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:01:58,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:01:58,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:01:58,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:01:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 813 refuted. 1 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-13 11:01:58,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96380179] [2020-10-13 11:01:58,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:01:58,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 11:01:58,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552786135] [2020-10-13 11:01:58,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 11:01:58,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:01:58,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 11:01:58,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=291, Unknown=1, NotChecked=0, Total=342 [2020-10-13 11:01:58,402 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 19 states. [2020-10-13 11:02:01,733 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2020-10-13 11:02:04,635 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-10-13 11:02:09,054 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-10-13 11:02:11,208 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296))))) is different from false [2020-10-13 11:02:12,082 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-13 11:02:15,669 WARN L193 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 63 DAG size of output: 23 [2020-10-13 11:02:22,623 WARN L193 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 65 DAG size of output: 25 [2020-10-13 11:02:27,012 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 23 [2020-10-13 11:02:34,951 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 73 DAG size of output: 25 [2020-10-13 11:02:45,014 WARN L193 SmtUtils]: Spent 2.94 s on a formula simplification. DAG size of input: 79 DAG size of output: 23 [2020-10-13 11:02:55,317 WARN L193 SmtUtils]: Spent 5.30 s on a formula simplification. DAG size of input: 81 DAG size of output: 25 [2020-10-13 11:03:03,005 WARN L193 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 87 DAG size of output: 23 [2020-10-13 11:03:07,517 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 89 DAG size of output: 25 [2020-10-13 11:03:09,556 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296))))) is different from false [2020-10-13 11:03:11,624 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296))))) is different from false [2020-10-13 11:03:22,567 WARN L193 SmtUtils]: Spent 5.31 s on a formula simplification. DAG size of input: 103 DAG size of output: 23 [2020-10-13 11:03:24,591 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (<= (+ c_main_~x~0 4999989) (+ (* 4294967296 (div (+ c_main_~x~0 (- 12)) 4294967296)) c_main_~y~0))) is different from false [2020-10-13 11:03:26,601 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296)))) (<= (+ c_main_~x~0 4999989) (+ (* 4294967296 (div (+ c_main_~x~0 (- 12)) 4294967296)) c_main_~y~0))) is different from false [2020-10-13 11:03:34,747 WARN L193 SmtUtils]: Spent 4.78 s on a formula simplification. DAG size of input: 113 DAG size of output: 25 [2020-10-13 11:03:36,898 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999988) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)))) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296)))) (<= (+ c_main_~x~0 4999989) (+ (* 4294967296 (div (+ c_main_~x~0 (- 12)) 4294967296)) c_main_~y~0))) is different from false [2020-10-13 11:03:38,950 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999988) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 13)) 4294967296)))) (<= (+ c_main_~x~0 4999987) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 14)) 4294967296)))) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (<= (+ c_main_~x~0 4999989) (+ (* 4294967296 (div (+ c_main_~x~0 (- 12)) 4294967296)) c_main_~y~0))) is different from false [2020-10-13 11:03:50,791 WARN L193 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 113 DAG size of output: 25