/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/array-fpi/ms2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:12:14,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:12:14,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:12:14,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:12:14,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:12:14,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:12:14,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:12:14,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:12:14,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:12:14,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:12:14,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:12:14,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:12:14,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:12:14,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:12:14,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:12:14,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:12:14,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:12:14,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:12:14,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:12:14,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:12:14,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:12:14,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:12:14,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:12:14,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:12:14,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:12:14,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:12:14,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:12:14,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:12:14,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:12:14,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:12:14,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:12:14,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:12:14,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:12:14,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:12:14,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:12:14,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:12:14,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:12:14,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:12:14,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:12:14,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:12:14,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:12:14,184 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 [2020-10-14 18:12:14,226 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:12:14,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:12:14,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:12:14,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:12:14,228 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:12:14,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:12:14,229 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:12:14,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:12:14,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:12:14,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:12:14,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:12:14,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:12:14,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:12:14,231 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:12:14,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:12:14,232 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:12:14,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:12:14,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:12:14,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:12:14,233 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:12:14,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:12:14,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:12:14,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:12:14,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:12:14,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:12:14,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:12:14,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:12:14,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:12:14,235 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:12:14,235 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:12:14,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:12:14,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:12:14,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:12:14,593 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:12:14,594 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:12:14,595 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms2.c [2020-10-14 18:12:14,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0eed17d92/efe8b8a4c7844bc2ac24e394013b5917/FLAGfdef7e806 [2020-10-14 18:12:15,098 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:12:15,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/ms2.c [2020-10-14 18:12:15,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0eed17d92/efe8b8a4c7844bc2ac24e394013b5917/FLAGfdef7e806 [2020-10-14 18:12:15,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0eed17d92/efe8b8a4c7844bc2ac24e394013b5917 [2020-10-14 18:12:15,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:12:15,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:12:15,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:12:15,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:12:15,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:12:15,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb5ca15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15, skipping insertion in model container [2020-10-14 18:12:15,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:12:15,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:12:15,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:12:15,816 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:12:15,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:12:15,854 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:12:15,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15 WrapperNode [2020-10-14 18:12:15,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:12:15,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:12:15,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:12:15,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:12:15,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (1/1) ... [2020-10-14 18:12:15,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:12:15,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:12:15,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:12:15,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:12:15,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (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 [2020-10-14 18:12:16,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:12:16,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:12:16,060 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 18:12:16,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:12:16,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:12:16,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:12:16,061 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 18:12:16,061 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 18:12:16,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:12:16,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:12:16,061 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 18:12:16,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:12:16,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:12:16,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 18:12:16,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:12:16,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:12:16,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:12:16,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:12:16,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:12:16,330 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:12:16,330 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 18:12:16,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:12:16 BoogieIcfgContainer [2020-10-14 18:12:16,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:12:16,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:12:16,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:12:16,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:12:16,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:12:15" (1/3) ... [2020-10-14 18:12:16,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4ab392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:12:16, skipping insertion in model container [2020-10-14 18:12:16,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:15" (2/3) ... [2020-10-14 18:12:16,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4ab392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:12:16, skipping insertion in model container [2020-10-14 18:12:16,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:12:16" (3/3) ... [2020-10-14 18:12:16,343 INFO L109 eAbstractionObserver]: Analyzing ICFG ms2.c [2020-10-14 18:12:16,354 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:12:16,365 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:12:16,399 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:12:16,426 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:12:16,427 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:12:16,427 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:12:16,427 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:12:16,428 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:12:16,428 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:12:16,428 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:12:16,428 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:12:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-14 18:12:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 18:12:16,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:16,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:16,455 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:16,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:16,461 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-10-14 18:12:16,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:16,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218902837] [2020-10-14 18:12:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:16,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:16,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:16,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:17,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 18:12:17,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:12:17,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-14 18:12:17,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:17,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:17,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:12:17,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:17,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:12:17,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:12:17,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:17,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:17,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:17,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:17,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:12:17,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:17,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:17,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:17,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:17,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:17,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:17,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:17,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:17,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:17,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:12:17,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 18:12:17,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:17,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:17,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:17,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:17,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:17,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:17,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218902837] [2020-10-14 18:12:17,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:12:17,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:12:17,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177657533] [2020-10-14 18:12:17,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:12:17,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:17,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:12:17,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:12:17,272 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2020-10-14 18:12:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:17,457 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2020-10-14 18:12:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:12:17,460 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-14 18:12:17,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:17,468 INFO L225 Difference]: With dead ends: 60 [2020-10-14 18:12:17,469 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 18:12:17,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:12:17,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 18:12:17,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 18:12:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 18:12:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-14 18:12:17,516 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-14 18:12:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:17,517 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-14 18:12:17,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:12:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-14 18:12:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 18:12:17,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:17,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:17,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:12:17,520 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-10-14 18:12:17,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:17,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711134346] [2020-10-14 18:12:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:17,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:17,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:17,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:12:17,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:12:17,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-10-14 18:12:17,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:17,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:17,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:12:17,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:17,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:12:17,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:18,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:18,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:18,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:18,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:18,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:12:18,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:18,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:18,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:18,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:18,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:18,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:18,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:18,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:18,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:18,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:18,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:12:18,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:18,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:18,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:18,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:18,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:18,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:12:18,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711134346] [2020-10-14 18:12:18,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:12:18,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 18:12:18,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566174444] [2020-10-14 18:12:18,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:12:18,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:18,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:12:18,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:12:18,077 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-14 18:12:18,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:18,298 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-14 18:12:18,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:12:18,299 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 18:12:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:18,300 INFO L225 Difference]: With dead ends: 36 [2020-10-14 18:12:18,300 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 18:12:18,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:12:18,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 18:12:18,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-14 18:12:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 18:12:18,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-14 18:12:18,309 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2020-10-14 18:12:18,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:18,309 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-14 18:12:18,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:12:18,310 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-14 18:12:18,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 18:12:18,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:18,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:18,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:12:18,311 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:18,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:18,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1255066423, now seen corresponding path program 1 times [2020-10-14 18:12:18,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:18,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626605764] [2020-10-14 18:12:18,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:18,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:18,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:18,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:12:18,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:12:18,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-14 18:12:18,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:18,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:18,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:12:18,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:18,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 18:12:18,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:19,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:19,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:19,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:19,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:19,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:19,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:19,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:19,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:19,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:19,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:19,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:19,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:19,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:19,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:19,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:19,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:19,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:19,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:12:19,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:19,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:19,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:19,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:19,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:19,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:19,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626605764] [2020-10-14 18:12:19,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:19,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:12:19,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950823250] [2020-10-14 18:12:19,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:12:19,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:12:19,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:12:19,038 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-10-14 18:12:19,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:19,263 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-14 18:12:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:12:19,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-14 18:12:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:19,266 INFO L225 Difference]: With dead ends: 56 [2020-10-14 18:12:19,266 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 18:12:19,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:12:19,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 18:12:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-14 18:12:19,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 18:12:19,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-14 18:12:19,287 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2020-10-14 18:12:19,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:19,294 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-14 18:12:19,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:12:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-14 18:12:19,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 18:12:19,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:19,296 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:19,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:12:19,298 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:19,299 INFO L82 PathProgramCache]: Analyzing trace with hash -278067577, now seen corresponding path program 2 times [2020-10-14 18:12:19,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:19,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444366708] [2020-10-14 18:12:19,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:19,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:19,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:19,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:19,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 18:12:19,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:12:19,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-14 18:12:19,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:19,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:19,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:12:19,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:19,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 18:12:19,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:19,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:19,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:19,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:19,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:19,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:19,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:12:19,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:19,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:19,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:19,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:19,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:19,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 17 [2020-10-14 18:12:19,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:19,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:19,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:19,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:19,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:19,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:19,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:19,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:19,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:19,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:19,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444366708] [2020-10-14 18:12:19,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:19,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:12:19,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906384340] [2020-10-14 18:12:19,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:12:19,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:19,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:12:19,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:12:19,645 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2020-10-14 18:12:19,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:19,842 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-14 18:12:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:12:19,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-14 18:12:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:19,843 INFO L225 Difference]: With dead ends: 45 [2020-10-14 18:12:19,844 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 18:12:19,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:12:19,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 18:12:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-14 18:12:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 18:12:19,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-14 18:12:19,851 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2020-10-14 18:12:19,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:19,851 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-14 18:12:19,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:12:19,852 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-14 18:12:19,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 18:12:19,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:19,853 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:19,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:12:19,853 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:19,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:19,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1246872481, now seen corresponding path program 1 times [2020-10-14 18:12:19,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:19,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107151849] [2020-10-14 18:12:19,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:19,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:20,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:21,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:21,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 18:12:21,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:12:21,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1930 [2020-10-14 18:12:21,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:21,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:21,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:12:21,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:21,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:12:21,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:22,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:22,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:22,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:22,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:22,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:22,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:22,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:22,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:22,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:22,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:22,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:22,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:22,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:22,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:22,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:12:22,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:22,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:22,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:22,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:22,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:22,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:12:22,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107151849] [2020-10-14 18:12:22,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:22,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:12:22,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544317864] [2020-10-14 18:12:22,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:12:22,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:22,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:12:22,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:12:22,223 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2020-10-14 18:12:22,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:22,829 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-10-14 18:12:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:12:22,830 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-14 18:12:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:22,831 INFO L225 Difference]: With dead ends: 41 [2020-10-14 18:12:22,831 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 18:12:22,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:12:22,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 18:12:22,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-14 18:12:22,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 18:12:22,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-14 18:12:22,839 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 31 [2020-10-14 18:12:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:22,839 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-14 18:12:22,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:12:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-14 18:12:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 18:12:22,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:22,841 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:22,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:12:22,841 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:22,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:22,842 INFO L82 PathProgramCache]: Analyzing trace with hash -726852151, now seen corresponding path program 2 times [2020-10-14 18:12:22,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:22,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166815948] [2020-10-14 18:12:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:22,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:22,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:22,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:23,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:23,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:23,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:23,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:24,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:24,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:25,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:25,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:26,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:26,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 18:12:26,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 18:12:26,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3344 [2020-10-14 18:12:26,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:26,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:26,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:12:26,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:26,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:12:26,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:26,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:26,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:26,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:26,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:26,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:26,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:26,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:26,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:26,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:26,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:26,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:26,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:26,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:26,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:26,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:26,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:26,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:26,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:26,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:26,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:26,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:26,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:12:26,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166815948] [2020-10-14 18:12:26,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:26,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:12:26,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468885945] [2020-10-14 18:12:26,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:12:26,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:26,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:12:26,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:12:26,390 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-10-14 18:12:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:26,781 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-14 18:12:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:12:26,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-14 18:12:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:26,783 INFO L225 Difference]: With dead ends: 57 [2020-10-14 18:12:26,783 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:12:26,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:12:26,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:12:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-14 18:12:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 18:12:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-14 18:12:26,790 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-14 18:12:26,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:26,791 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-14 18:12:26,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:12:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-14 18:12:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:12:26,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:26,792 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:26,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:12:26,793 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1923985017, now seen corresponding path program 3 times [2020-10-14 18:12:26,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:26,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969367847] [2020-10-14 18:12:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:26,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:27,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:27,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:27,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:27,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:27,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:28,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:29,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:29,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:12:29,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:12:29,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2856 [2020-10-14 18:12:29,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:29,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:29,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:12:29,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:29,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:12:29,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:30,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:30,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:30,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:30,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:30,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:30,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:30,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:30,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:30,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:30,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:30,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:30,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:30,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:30,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:30,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:30,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:30,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:30,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:12:30,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:30,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:30,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:30,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:30,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:30,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:12:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:12:30,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969367847] [2020-10-14 18:12:30,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:30,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:12:30,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552218041] [2020-10-14 18:12:30,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:12:30,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:30,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:12:30,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:12:30,523 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2020-10-14 18:12:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:31,995 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-14 18:12:31,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:12:31,996 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-10-14 18:12:31,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:31,996 INFO L225 Difference]: With dead ends: 46 [2020-10-14 18:12:31,997 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:12:31,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:12:31,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:12:32,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-14 18:12:32,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 18:12:32,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-14 18:12:32,005 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-10-14 18:12:32,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:32,006 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-14 18:12:32,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:12:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-14 18:12:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 18:12:32,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:32,007 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:32,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:12:32,007 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:32,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:32,008 INFO L82 PathProgramCache]: Analyzing trace with hash -231866845, now seen corresponding path program 4 times [2020-10-14 18:12:32,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:32,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843765753] [2020-10-14 18:12:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:32,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:32,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:32,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:32,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:32,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:32,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:32,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:32,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:36,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:36,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:37,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:37,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 18:12:37,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 18:12:37,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:12:37,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:37,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:12:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:12:37,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:37,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:37,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:37,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:37,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:37,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:37,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:37,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:37,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:37,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:37,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:37,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:37,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:37,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:37,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:37,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:37,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:37,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:37,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:37,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:37,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:37,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:37,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:37,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:37,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:12:37,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843765753] [2020-10-14 18:12:37,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:37,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:12:37,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463311379] [2020-10-14 18:12:37,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:12:37,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:37,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:12:37,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:12:37,279 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 16 states. [2020-10-14 18:12:37,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:37,886 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-14 18:12:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:12:37,887 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-14 18:12:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:37,888 INFO L225 Difference]: With dead ends: 65 [2020-10-14 18:12:37,888 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 18:12:37,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:12:37,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 18:12:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-14 18:12:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 18:12:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-14 18:12:37,904 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-10-14 18:12:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:37,905 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-14 18:12:37,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:12:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-14 18:12:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:12:37,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:37,908 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:37,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:12:37,910 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:37,910 INFO L82 PathProgramCache]: Analyzing trace with hash 604598565, now seen corresponding path program 5 times [2020-10-14 18:12:37,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:37,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610550955] [2020-10-14 18:12:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:37,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:38,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:39,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:39,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:39,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:39,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:39,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:41,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:41,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:41,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 18:12:41,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:12:41,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3470 [2020-10-14 18:12:41,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:41,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:41,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:12:41,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:41,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:12:41,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:41,892 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2020-10-14 18:12:42,185 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-14 18:12:42,347 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-14 18:12:42,534 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-14 18:12:42,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:42,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:42,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:42,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:42,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:42,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:42,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:42,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:42,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:42,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:42,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:42,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:42,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:42,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:42,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:42,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:42,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:42,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:42,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:42,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:42,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:42,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:12:42,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610550955] [2020-10-14 18:12:42,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:42,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:12:42,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046490129] [2020-10-14 18:12:42,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:12:42,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:42,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:12:42,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:12:42,962 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-10-14 18:12:43,282 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-14 18:12:44,342 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 117 [2020-10-14 18:12:44,544 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-10-14 18:12:44,892 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2020-10-14 18:12:45,357 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-14 18:12:46,009 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 96 [2020-10-14 18:12:46,415 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 98 [2020-10-14 18:12:46,830 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2020-10-14 18:12:46,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:46,893 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-10-14 18:12:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:12:46,894 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 41 [2020-10-14 18:12:46,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:46,895 INFO L225 Difference]: With dead ends: 51 [2020-10-14 18:12:46,895 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 18:12:46,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=294, Invalid=1776, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:12:46,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 18:12:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-14 18:12:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 18:12:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-14 18:12:46,904 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2020-10-14 18:12:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:46,904 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-14 18:12:46,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:12:46,905 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-14 18:12:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 18:12:46,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:46,907 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:46,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:12:46,908 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:46,909 INFO L82 PathProgramCache]: Analyzing trace with hash -629780027, now seen corresponding path program 6 times [2020-10-14 18:12:46,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:46,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920231425] [2020-10-14 18:12:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:50,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:50,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:51,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:51,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:51,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:12:51,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:12:51,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:12:51,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:51,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:51,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:12:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:12:51,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:52,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:52,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:52,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:52,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:52,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:52,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:52,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:52,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:52,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:52,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:52,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:52,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:52,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:52,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:52,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:52,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:52,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:52,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:52,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:52,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:52,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:52,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:52,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:52,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:12:52,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920231425] [2020-10-14 18:12:52,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:52,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:12:52,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573304824] [2020-10-14 18:12:52,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:12:52,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:52,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:12:52,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:12:52,252 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 19 states. [2020-10-14 18:12:53,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:53,106 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-14 18:12:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:12:53,106 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-14 18:12:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:53,108 INFO L225 Difference]: With dead ends: 73 [2020-10-14 18:12:53,108 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 18:12:53,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:12:53,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 18:12:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-14 18:12:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 18:12:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-14 18:12:53,124 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-14 18:12:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:53,124 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-14 18:12:53,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:12:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-14 18:12:53,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 18:12:53,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:53,127 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:53,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:12:53,127 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:53,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:53,128 INFO L82 PathProgramCache]: Analyzing trace with hash -634097661, now seen corresponding path program 7 times [2020-10-14 18:12:53,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:53,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420585179] [2020-10-14 18:12:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:53,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:53,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:54,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:54,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:57,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:57,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:57,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:58,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:58,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:58,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 18:12:58,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:12:58,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5143 [2020-10-14 18:12:58,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:58,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:58,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:12:58,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:58,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:12:58,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:58,596 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 27 [2020-10-14 18:12:59,058 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 37 [2020-10-14 18:12:59,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:59,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:59,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:59,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:59,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:59,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:59,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:59,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:59,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:59,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:59,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:59,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:59,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:59,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:59,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:59,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:59,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:59,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:59,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:59,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:59,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:59,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:59,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420585179] [2020-10-14 18:12:59,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:59,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:12:59,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754600851] [2020-10-14 18:12:59,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:12:59,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:59,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:12:59,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:12:59,720 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2020-10-14 18:13:01,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:01,438 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-14 18:13:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:13:01,439 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-10-14 18:13:01,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:01,444 INFO L225 Difference]: With dead ends: 78 [2020-10-14 18:13:01,444 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 18:13:01,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:13:01,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 18:13:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2020-10-14 18:13:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 18:13:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-14 18:13:01,466 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 46 [2020-10-14 18:13:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:01,466 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-14 18:13:01,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:13:01,467 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-14 18:13:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 18:13:01,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:01,468 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:01,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:13:01,468 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:01,468 INFO L82 PathProgramCache]: Analyzing trace with hash -488376639, now seen corresponding path program 8 times [2020-10-14 18:13:01,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:01,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965051038] [2020-10-14 18:13:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:01,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:01,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:01,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:02,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:03,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:04,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:04,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:04,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:04,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:04,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:05,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:05,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:06,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:06,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 18:13:06,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:13:06,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 18:13:06,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:06,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:06,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:13:06,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:06,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:13:06,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:06,904 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 25 [2020-10-14 18:13:07,040 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 23 [2020-10-14 18:13:07,406 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 39 [2020-10-14 18:13:08,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:08,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:08,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:08,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:08,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:08,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:08,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:08,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:08,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:08,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:08,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:08,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:08,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:08,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:08,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:08,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:08,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:08,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:08,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:08,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:08,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:08,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:08,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:08,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:13:08,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965051038] [2020-10-14 18:13:08,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:08,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:13:08,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651481706] [2020-10-14 18:13:08,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:13:08,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:08,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:13:08,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:13:08,207 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 25 states. [2020-10-14 18:13:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:10,483 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-10-14 18:13:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 18:13:10,484 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-10-14 18:13:10,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:10,485 INFO L225 Difference]: With dead ends: 103 [2020-10-14 18:13:10,485 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 18:13:10,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=228, Invalid=2222, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 18:13:10,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 18:13:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 57. [2020-10-14 18:13:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 18:13:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-14 18:13:10,501 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 48 [2020-10-14 18:13:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:10,501 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-14 18:13:10,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:13:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-14 18:13:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 18:13:10,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:10,502 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:10,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:13:10,503 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:10,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:10,504 INFO L82 PathProgramCache]: Analyzing trace with hash -270041561, now seen corresponding path program 9 times [2020-10-14 18:13:10,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:10,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93366654] [2020-10-14 18:13:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:10,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:11,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:12,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:13,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:13,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:15,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:15,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 18:13:15,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:13:15,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 18:13:15,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:15,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:15,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:13:15,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:13:15,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:13:15,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:15,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:15,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:15,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:15,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:15,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:15,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:15,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:15,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:15,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:15,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:15,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:15,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:15,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:15,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:15,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:15,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:15,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:15,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:15,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:15,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:15,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:15,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:15,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:15,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:13:15,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93366654] [2020-10-14 18:13:15,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:15,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:13:15,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095299582] [2020-10-14 18:13:15,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:13:15,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:15,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:13:15,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:13:15,999 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 22 states. [2020-10-14 18:13:17,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:17,117 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2020-10-14 18:13:17,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 18:13:17,117 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-14 18:13:17,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:17,119 INFO L225 Difference]: With dead ends: 105 [2020-10-14 18:13:17,119 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 18:13:17,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=471, Invalid=1691, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 18:13:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 18:13:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2020-10-14 18:13:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 18:13:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-14 18:13:17,132 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 49 [2020-10-14 18:13:17,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:17,132 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-14 18:13:17,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:13:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-14 18:13:17,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 18:13:17,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:17,133 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:17,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:13:17,134 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:17,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:17,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2110572031, now seen corresponding path program 10 times [2020-10-14 18:13:17,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:17,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299261381] [2020-10-14 18:13:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:17,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:17,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:17,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:17,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:17,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:18,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:20,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:21,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:21,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:21,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:21,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:21,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:21,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:22,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:22,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 18:13:22,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:13:22,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:13:22,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:22,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:22,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:13:22,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:22,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:13:22,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:13:22,703 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 25 [2020-10-14 18:13:23,071 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-10-14 18:13:23,307 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-10-14 18:13:24,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:24,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:24,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:24,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:24,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:24,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:24,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:24,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:24,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:24,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:24,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:24,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:24,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:24,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:24,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:24,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:24,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:24,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:24,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:13:24,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299261381] [2020-10-14 18:13:24,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:24,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:13:24,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631868546] [2020-10-14 18:13:24,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:13:24,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:24,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:13:24,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:13:24,196 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 26 states. [2020-10-14 18:13:26,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:26,735 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2020-10-14 18:13:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 18:13:26,735 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-10-14 18:13:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:26,737 INFO L225 Difference]: With dead ends: 105 [2020-10-14 18:13:26,737 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 18:13:26,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=221, Invalid=2229, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 18:13:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 18:13:26,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2020-10-14 18:13:26,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 18:13:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-14 18:13:26,752 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 50 [2020-10-14 18:13:26,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:26,752 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-14 18:13:26,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:13:26,752 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-14 18:13:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 18:13:26,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:26,753 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:26,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:13:26,753 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:26,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1307011415, now seen corresponding path program 11 times [2020-10-14 18:13:26,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:26,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236552170] [2020-10-14 18:13:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:26,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:27,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:27,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:28,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:28,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:29,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:30,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:30,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:30,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:31,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:31,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:31,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:13:31,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 18:13:31,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:13:31,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:31,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:31,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:13:31,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:31,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:13:31,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:32,316 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2020-10-14 18:13:32,476 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 33 [2020-10-14 18:13:32,671 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 37 [2020-10-14 18:13:32,840 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-10-14 18:13:33,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:33,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:33,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:33,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:33,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:33,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:33,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:33,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:33,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:33,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:33,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:33,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:33,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:33,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:33,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:33,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:33,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:33,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:33,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:33,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:33,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:33,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:33,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:33,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:13:33,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236552170] [2020-10-14 18:13:33,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:33,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:13:33,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756320900] [2020-10-14 18:13:33,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:13:33,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:33,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:13:33,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:13:33,799 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 28 states. [2020-10-14 18:13:36,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:36,066 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2020-10-14 18:13:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:13:36,066 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2020-10-14 18:13:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:36,068 INFO L225 Difference]: With dead ends: 91 [2020-10-14 18:13:36,068 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 18:13:36,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=140, Invalid=1840, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:13:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 18:13:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2020-10-14 18:13:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:13:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-10-14 18:13:36,082 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 51 [2020-10-14 18:13:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:36,083 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-10-14 18:13:36,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:13:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-10-14 18:13:36,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 18:13:36,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:36,084 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:36,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:13:36,084 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:36,084 INFO L82 PathProgramCache]: Analyzing trace with hash 29277629, now seen corresponding path program 12 times [2020-10-14 18:13:36,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:36,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435507526] [2020-10-14 18:13:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:36,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:36,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:36,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:36,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:36,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:37,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:37,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:38,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:38,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:38,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:38,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:39,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:39,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:39,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:41,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:41,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 18:13:41,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 18:13:41,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 18:13:41,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:41,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:41,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:13:41,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:13:41,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 18:13:41,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:13:41,843 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-14 18:13:42,074 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 34 [2020-10-14 18:13:42,507 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2020-10-14 18:13:42,886 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 56 [2020-10-14 18:13:43,321 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 58 [2020-10-14 18:13:43,544 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-10-14 18:13:43,702 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-14 18:13:44,029 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2020-10-14 18:13:44,334 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 81 [2020-10-14 18:13:44,740 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2020-10-14 18:13:44,979 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-14 18:13:45,362 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 71 [2020-10-14 18:13:46,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:46,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:46,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:46,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:46,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:46,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:46,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:46,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:46,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:46,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:46,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:46,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:46,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:46,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:46,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:46,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:46,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:46,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:46,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:13:46,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:46,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:13:46,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 50 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 18:13:46,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435507526] [2020-10-14 18:13:46,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:46,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 18:13:46,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694486145] [2020-10-14 18:13:46,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 18:13:46,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:46,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 18:13:46,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:13:46,180 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 27 states. [2020-10-14 18:13:46,859 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-10-14 18:13:47,139 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-14 18:13:47,456 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-14 18:13:47,826 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2020-10-14 18:13:48,152 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 69 [2020-10-14 18:13:48,478 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-10-14 18:13:50,656 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 269 DAG size of output: 202 [2020-10-14 18:13:51,244 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 110 [2020-10-14 18:13:52,503 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 200 DAG size of output: 198 [2020-10-14 18:13:53,051 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 125 [2020-10-14 18:13:53,371 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-14 18:13:53,648 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2020-10-14 18:13:54,066 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 118 [2020-10-14 18:13:54,336 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-14 18:13:54,628 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-14 18:13:55,041 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 111 [2020-10-14 18:13:55,457 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 18:13:55,785 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-14 18:13:56,918 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 180 DAG size of output: 172 [2020-10-14 18:13:58,076 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 179 DAG size of output: 171 [2020-10-14 18:13:59,277 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 182 DAG size of output: 174 [2020-10-14 18:13:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:59,506 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2020-10-14 18:13:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 18:13:59,507 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-10-14 18:13:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:59,509 INFO L225 Difference]: With dead ends: 99 [2020-10-14 18:13:59,509 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 18:13:59,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=367, Invalid=2603, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 18:13:59,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 18:13:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 60. [2020-10-14 18:13:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 18:13:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-14 18:13:59,525 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 52 [2020-10-14 18:13:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:59,525 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-14 18:13:59,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 18:13:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-14 18:13:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 18:13:59,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:59,526 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:59,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:13:59,527 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:59,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:59,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1402628437, now seen corresponding path program 13 times [2020-10-14 18:13:59,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:59,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565099868] [2020-10-14 18:13:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:59,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:59,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:00,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:00,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:01,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:01,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:02,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:02,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:02,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:02,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:03,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:04,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:04,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:04,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 18:14:04,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:14:04,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:14:04,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:04,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:04,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:14:04,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:14:04,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 18:14:04,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:06,057 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 22 [2020-10-14 18:14:06,318 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 38 [2020-10-14 18:14:06,700 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 40 [2020-10-14 18:14:07,136 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 50 [2020-10-14 18:14:07,591 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 52 [2020-10-14 18:14:10,162 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 260 DAG size of output: 64 [2020-10-14 18:14:10,898 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 67 [2020-10-14 18:14:11,738 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 77 [2020-10-14 18:14:12,781 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 87 [2020-10-14 18:14:13,500 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 83 [2020-10-14 18:14:13,975 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 77 [2020-10-14 18:14:15,857 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 226 DAG size of output: 160 [2020-10-14 18:14:17,280 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 185 DAG size of output: 144 [2020-10-14 18:14:19,261 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 185 DAG size of output: 150 [2020-10-14 18:14:20,308 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 128 [2020-10-14 18:14:21,071 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 98 [2020-10-14 18:14:21,650 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 91 [2020-10-14 18:14:22,120 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2020-10-14 18:14:22,331 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2020-10-14 18:14:22,538 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2020-10-14 18:14:23,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:23,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:23,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:23,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:23,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:23,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:14:23,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:23,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:23,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:23,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:23,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:23,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:23,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:23,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:23,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:23,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:23,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:23,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:23,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:23,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:23,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:14:23,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:23,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:14:23,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 71 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:14:23,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565099868] [2020-10-14 18:14:23,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:23,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 18:14:23,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587948950] [2020-10-14 18:14:23,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 18:14:23,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:23,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 18:14:23,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:14:23,560 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 31 states. [2020-10-14 18:14:30,008 WARN L193 SmtUtils]: Spent 5.61 s on a formula simplification. DAG size of input: 398 DAG size of output: 273 [2020-10-14 18:14:36,685 WARN L193 SmtUtils]: Spent 5.60 s on a formula simplification. DAG size of input: 400 DAG size of output: 273 [2020-10-14 18:14:40,650 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 191 DAG size of output: 110 [2020-10-14 18:14:44,230 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 209 DAG size of output: 100 [2020-10-14 18:15:20,480 WARN L193 SmtUtils]: Spent 35.47 s on a formula simplification. DAG size of input: 610 DAG size of output: 482 [2020-10-14 18:15:38,012 WARN L193 SmtUtils]: Spent 16.75 s on a formula simplification. DAG size of input: 431 DAG size of output: 317 [2020-10-14 18:15:58,745 WARN L193 SmtUtils]: Spent 19.36 s on a formula simplification. DAG size of input: 507 DAG size of output: 370 [2020-10-14 18:16:07,561 WARN L193 SmtUtils]: Spent 7.46 s on a formula simplification. DAG size of input: 309 DAG size of output: 240 [2020-10-14 18:16:11,150 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 148 DAG size of output: 144 [2020-10-14 18:16:14,275 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 211 DAG size of output: 208