/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:34:23,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:34:23,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:34:23,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:34:23,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:34:23,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:34:23,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:34:23,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:34:23,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:34:23,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:34:23,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:34:23,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:34:23,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:34:23,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:34:23,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:34:23,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:34:23,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:34:23,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:34:23,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:34:23,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:34:23,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:34:23,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:34:23,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:34:23,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:34:23,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:34:23,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:34:23,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:34:23,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:34:23,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:34:23,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:34:23,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:34:23,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:34:23,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:34:23,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:34:23,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:34:23,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:34:23,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:34:23,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:34:23,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:34:23,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:34:23,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:34:23,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:34:23,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:34:23,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:34:23,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:34:23,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:34:23,276 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:34:23,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:34:23,277 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:34:23,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:34:23,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:34:23,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:34:23,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:34:23,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:34:23,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:34:23,279 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:34:23,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:34:23,280 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:34:23,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:34:23,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:34:23,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:34:23,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:34:23,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:34:23,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:34:23,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:34:23,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:34:23,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:34:23,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:34:23,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:34:23,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:34:23,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:34:23,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:34:23,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:34:23,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:34:23,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:34:23,607 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:34:23,607 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:34:23,608 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2020-10-13 04:34:23,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44b519394/84286da44ca04b46aa1b4f9c769404a3/FLAG32a6ebd78 [2020-10-13 04:34:24,090 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:34:24,091 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2020-10-13 04:34:24,097 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44b519394/84286da44ca04b46aa1b4f9c769404a3/FLAG32a6ebd78 [2020-10-13 04:34:24,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44b519394/84286da44ca04b46aa1b4f9c769404a3 [2020-10-13 04:34:24,518 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:34:24,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:34:24,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:34:24,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:34:24,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:34:24,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:34:24" (1/1) ... [2020-10-13 04:34:24,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f0c700e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:24, skipping insertion in model container [2020-10-13 04:34:24,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:34:24" (1/1) ... [2020-10-13 04:34:24,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:34:24,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:34:24,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:34:24,784 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:34:24,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:34:24,824 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:34:24,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:24 WrapperNode [2020-10-13 04:34:24,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:34:24,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:34:24,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:34:24,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:34:24,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:24" (1/1) ... [2020-10-13 04:34:24,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:24" (1/1) ... [2020-10-13 04:34:24,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:24" (1/1) ... [2020-10-13 04:34:24,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:24" (1/1) ... [2020-10-13 04:34:24,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:24" (1/1) ... [2020-10-13 04:34:24,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:24" (1/1) ... [2020-10-13 04:34:24,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:24" (1/1) ... [2020-10-13 04:34:24,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:34:24,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:34:24,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:34:24,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:34:24,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:34:25,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:34:25,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:34:25,038 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 04:34:25,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:34:25,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:34:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:34:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 04:34:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 04:34:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:34:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-13 04:34:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 04:34:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:34:25,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 04:34:25,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:34:25,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:34:25,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:34:25,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:34:25,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:34:25,287 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:34:25,288 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 04:34:25,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:34:25 BoogieIcfgContainer [2020-10-13 04:34:25,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:34:25,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:34:25,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:34:25,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:34:25,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:34:24" (1/3) ... [2020-10-13 04:34:25,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1843243a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:34:25, skipping insertion in model container [2020-10-13 04:34:25,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:34:24" (2/3) ... [2020-10-13 04:34:25,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1843243a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:34:25, skipping insertion in model container [2020-10-13 04:34:25,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:34:25" (3/3) ... [2020-10-13 04:34:25,301 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const1.c [2020-10-13 04:34:25,313 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:34:25,322 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:34:25,341 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:34:25,381 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:34:25,382 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:34:25,382 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:34:25,382 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:34:25,382 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:34:25,383 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:34:25,383 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:34:25,383 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:34:25,405 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 04:34:25,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:34:25,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:25,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:25,438 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash -378544401, now seen corresponding path program 1 times [2020-10-13 04:34:25,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:25,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514079042] [2020-10-13 04:34:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:25,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:25,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:25,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:25,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:25,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:25,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:34:25,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:34:25,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-13 04:34:25,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:25,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:25,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 04:34:25,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:25,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:34:26,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:26,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:26,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:26,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:26,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:26,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:34:26,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:26,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:26,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:26,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:26,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:34:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:34:26,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514079042] [2020-10-13 04:34:26,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:34:26,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:34:26,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5907349] [2020-10-13 04:34:26,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:34:26,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:26,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:34:26,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:34:26,107 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-13 04:34:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:26,201 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-10-13 04:34:26,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:34:26,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 04:34:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:26,214 INFO L225 Difference]: With dead ends: 45 [2020-10-13 04:34:26,215 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 04:34:26,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:34:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 04:34:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 04:34:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 04:34:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 04:34:26,254 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2020-10-13 04:34:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:26,254 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 04:34:26,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:34:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 04:34:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:34:26,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:26,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:26,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:34:26,257 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:26,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:26,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1414140317, now seen corresponding path program 1 times [2020-10-13 04:34:26,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:26,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084211921] [2020-10-13 04:34:26,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:26,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:26,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:26,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:26,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:26,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:26,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:34:26,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:34:26,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-13 04:34:26,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:26,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:34:26,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:26,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:34:26,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 04:34:26,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:26,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:26,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:26,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:26,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:26,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:34:26,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:26,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:26,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:26,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:26,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:34:26,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084211921] [2020-10-13 04:34:26,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:34:26,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:34:26,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997018363] [2020-10-13 04:34:26,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:34:26,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:26,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:34:26,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:34:26,754 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-13 04:34:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:26,852 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-13 04:34:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:34:26,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 04:34:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:26,854 INFO L225 Difference]: With dead ends: 33 [2020-10-13 04:34:26,854 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 04:34:26,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:34:26,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 04:34:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-13 04:34:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 04:34:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 04:34:26,875 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-10-13 04:34:26,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:26,875 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 04:34:26,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:34:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 04:34:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 04:34:26,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:26,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:26,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:34:26,880 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:26,881 INFO L82 PathProgramCache]: Analyzing trace with hash 24846977, now seen corresponding path program 1 times [2020-10-13 04:34:26,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:26,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142490001] [2020-10-13 04:34:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:26,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:26,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:26,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:27,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:27,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:27,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 04:34:27,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:34:27,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 582 [2020-10-13 04:34:27,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:27,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:34:27,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:27,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:34:27,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:34:27,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:27,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:27,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:27,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:27,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:27,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:34:27,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:27,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:27,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:27,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:27,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:34:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:34:27,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142490001] [2020-10-13 04:34:27,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:34:27,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:34:27,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780385460] [2020-10-13 04:34:27,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:34:27,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:27,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:34:27,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:34:27,566 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-13 04:34:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:27,663 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-13 04:34:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:34:27,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 04:34:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:27,665 INFO L225 Difference]: With dead ends: 34 [2020-10-13 04:34:27,665 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 04:34:27,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:34:27,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 04:34:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 04:34:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 04:34:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 04:34:27,675 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-10-13 04:34:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:27,676 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 04:34:27,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:34:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 04:34:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:34:27,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:27,677 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:27,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:34:27,678 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:27,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:27,678 INFO L82 PathProgramCache]: Analyzing trace with hash -87832801, now seen corresponding path program 2 times [2020-10-13 04:34:27,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:27,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583953376] [2020-10-13 04:34:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:27,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:27,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:27,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:27,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:27,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:34:27,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:34:27,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-13 04:34:27,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:34:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:34:27,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:27,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:27,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:27,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:27,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:27,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:27,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:34:27,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:27,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:27,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:27,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:27,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:34:27,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583953376] [2020-10-13 04:34:27,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:34:27,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 04:34:27,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960282783] [2020-10-13 04:34:27,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:34:27,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:27,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:34:27,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:34:27,957 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-13 04:34:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:28,044 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-13 04:34:28,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:34:28,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 04:34:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:28,046 INFO L225 Difference]: With dead ends: 35 [2020-10-13 04:34:28,046 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 04:34:28,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:34:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 04:34:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-13 04:34:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 04:34:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 04:34:28,053 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2020-10-13 04:34:28,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:28,054 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 04:34:28,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:34:28,054 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 04:34:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 04:34:28,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:28,055 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] [2020-10-13 04:34:28,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:34:28,055 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash -716697317, now seen corresponding path program 1 times [2020-10-13 04:34:28,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:28,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683867149] [2020-10-13 04:34:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:28,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:28,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:28,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:28,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:28,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:29,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:29,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:29,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 04:34:29,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:34:29,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1879 [2020-10-13 04:34:29,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:34:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:34:29,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:29,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:30,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:30,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:30,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:30,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:30,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:34:30,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:30,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:30,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:30,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:30,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 04:34:30,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683867149] [2020-10-13 04:34:30,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:34:30,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:34:30,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454275331] [2020-10-13 04:34:30,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:34:30,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:30,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:34:30,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:34:30,011 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-13 04:34:30,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:30,148 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-13 04:34:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:34:30,149 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 04:34:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:30,150 INFO L225 Difference]: With dead ends: 38 [2020-10-13 04:34:30,150 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 04:34:30,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:34:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 04:34:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 04:34:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 04:34:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 04:34:30,157 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2020-10-13 04:34:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:30,157 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 04:34:30,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:34:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 04:34:30,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:34:30,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:30,159 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:30,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:34:30,159 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:30,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:30,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1075581673, now seen corresponding path program 2 times [2020-10-13 04:34:30,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:30,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224743669] [2020-10-13 04:34:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:30,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:30,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:30,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:30,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:30,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:31,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:31,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:31,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:31,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:33,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:33,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:34:33,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:34:33,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3168 [2020-10-13 04:34:33,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:33,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:34:33,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:33,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:34:33,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:33,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:33,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:33,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:33,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:33,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:33,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:34:33,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:33,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:33,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:33,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:34:33,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224743669] [2020-10-13 04:34:33,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:34:33,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:34:33,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842081555] [2020-10-13 04:34:33,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:34:33,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:33,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:34:33,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:34:33,860 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 14 states. [2020-10-13 04:34:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:34,128 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-13 04:34:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:34:34,128 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-13 04:34:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:34,129 INFO L225 Difference]: With dead ends: 42 [2020-10-13 04:34:34,130 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 04:34:34,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:34:34,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 04:34:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-13 04:34:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 04:34:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-13 04:34:34,137 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 28 [2020-10-13 04:34:34,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:34,137 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-13 04:34:34,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:34:34,138 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-13 04:34:34,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:34:34,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:34,139 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:34,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:34:34,139 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:34,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:34,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2014917621, now seen corresponding path program 3 times [2020-10-13 04:34:34,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:34,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809754453] [2020-10-13 04:34:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:34,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:34,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:34,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:34,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:34:34,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:34:34,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-13 04:34:34,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:34,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:34:34,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:34,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:34:34,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:35,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:35,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:35,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:35,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:35,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:35,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:34:35,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:35,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:35,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:35,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:34:35,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809754453] [2020-10-13 04:34:35,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:34:35,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:34:35,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823492918] [2020-10-13 04:34:35,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:34:35,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:35,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:34:35,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:34:35,049 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 10 states. [2020-10-13 04:34:35,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:35,281 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-13 04:34:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:34:35,282 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-13 04:34:35,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:35,283 INFO L225 Difference]: With dead ends: 68 [2020-10-13 04:34:35,283 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 04:34:35,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:34:35,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 04:34:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-10-13 04:34:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 04:34:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-13 04:34:35,290 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-10-13 04:34:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:35,290 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-13 04:34:35,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:34:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-13 04:34:35,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:34:35,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:35,292 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:35,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:34:35,292 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:35,293 INFO L82 PathProgramCache]: Analyzing trace with hash -362161261, now seen corresponding path program 4 times [2020-10-13 04:34:35,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:35,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143941390] [2020-10-13 04:34:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:35,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:35,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:36,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:36,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:34:36,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:34:36,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-10-13 04:34:36,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:36,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:34:36,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 04:34:36,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:34:36,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:36,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:36,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:36,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:36,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:36,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:36,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:34:36,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:36,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:36,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:36,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:36,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:34:36,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143941390] [2020-10-13 04:34:36,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:34:36,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:34:36,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28922992] [2020-10-13 04:34:36,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:34:36,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:36,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:34:36,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:34:36,203 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2020-10-13 04:34:36,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:36,487 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-13 04:34:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:34:36,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-13 04:34:36,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:36,489 INFO L225 Difference]: With dead ends: 40 [2020-10-13 04:34:36,489 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 04:34:36,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:34:36,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 04:34:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 04:34:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 04:34:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-13 04:34:36,495 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-10-13 04:34:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:36,496 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-13 04:34:36,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:34:36,496 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-13 04:34:36,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:34:36,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:36,497 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:36,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:34:36,498 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:36,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:36,498 INFO L82 PathProgramCache]: Analyzing trace with hash 868717361, now seen corresponding path program 5 times [2020-10-13 04:34:36,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:36,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257123353] [2020-10-13 04:34:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:36,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:36,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:36,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:37,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:37,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:37,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:38,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:39,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:40,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:41,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:41,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:41,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:41,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 04:34:41,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 04:34:41,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-13 04:34:41,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:41,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:34:41,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:41,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:34:41,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:42,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:42,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:42,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:42,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:42,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:42,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:34:42,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:42,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:42,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:42,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:42,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:34:42,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257123353] [2020-10-13 04:34:42,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:34:42,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:34:42,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967988043] [2020-10-13 04:34:42,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:34:42,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:42,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:34:42,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:34:42,682 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 23 states. [2020-10-13 04:34:42,986 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-13 04:34:43,792 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-13 04:34:43,946 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-13 04:34:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:44,744 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-10-13 04:34:44,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:34:44,745 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-13 04:34:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:44,746 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:34:44,747 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 04:34:44,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=212, Invalid=1270, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:34:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 04:34:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-10-13 04:34:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:34:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-13 04:34:44,765 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 34 [2020-10-13 04:34:44,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:44,766 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-13 04:34:44,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:34:44,766 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-13 04:34:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 04:34:44,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:44,774 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:44,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:34:44,775 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1816876145, now seen corresponding path program 6 times [2020-10-13 04:34:44,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:44,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078394358] [2020-10-13 04:34:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:44,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:44,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:46,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:46,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 04:34:46,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:34:46,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1461 [2020-10-13 04:34:46,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:46,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:34:46,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:46,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:34:46,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:46,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:46,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:46,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:46,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:46,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:46,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:34:46,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:46,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:46,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:46,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:46,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:34:46,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078394358] [2020-10-13 04:34:46,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:34:46,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:34:46,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944427854] [2020-10-13 04:34:46,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:34:46,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:46,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:34:46,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:34:46,361 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 12 states. [2020-10-13 04:34:46,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:46,626 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-13 04:34:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:34:46,627 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-13 04:34:46,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:46,628 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:34:46,628 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:34:46,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:34:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:34:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2020-10-13 04:34:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 04:34:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-13 04:34:46,647 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 36 [2020-10-13 04:34:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:46,648 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-13 04:34:46,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:34:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-13 04:34:46,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 04:34:46,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:46,651 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:46,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:34:46,652 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:46,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:46,652 INFO L82 PathProgramCache]: Analyzing trace with hash 941571023, now seen corresponding path program 7 times [2020-10-13 04:34:46,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:46,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738766017] [2020-10-13 04:34:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:46,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:46,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:47,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:47,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:48,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:49,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:49,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:50,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:50,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:50,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:51,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:51,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:51,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 04:34:51,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 04:34:51,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:34:51,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:51,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:34:51,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:51,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:34:51,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:34:51,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:51,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:51,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:51,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:51,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:51,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:34:51,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:51,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:51,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:51,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:51,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:34:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:34:51,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738766017] [2020-10-13 04:34:51,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:34:51,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:34:51,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208325008] [2020-10-13 04:34:51,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:34:51,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:51,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:34:51,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:34:51,827 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 12 states. [2020-10-13 04:34:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:34:52,248 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-13 04:34:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:34:52,249 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-13 04:34:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:34:52,250 INFO L225 Difference]: With dead ends: 54 [2020-10-13 04:34:52,251 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:34:52,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:34:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:34:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 04:34:52,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:34:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-13 04:34:52,266 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2020-10-13 04:34:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:34:52,269 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-13 04:34:52,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:34:52,269 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-13 04:34:52,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 04:34:52,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:34:52,270 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:34:52,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:34:52,271 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:34:52,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:34:52,272 INFO L82 PathProgramCache]: Analyzing trace with hash -23822901, now seen corresponding path program 8 times [2020-10-13 04:34:52,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:34:52,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888396714] [2020-10-13 04:34:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:34:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:52,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:52,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:52,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:53,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:53,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:53,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:54,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:54,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:55,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:55,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:56,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:56,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:56,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:56,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:57,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:57,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:57,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 04:34:57,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 04:34:57,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:34:57,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:57,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:34:57,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:34:57,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:34:57,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:34:58,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:34:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:34:58,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:34:58,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:34:58,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:34:58,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:34:58,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:34:58,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:34:58,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:34:58,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:34:58,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:34:58,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:34:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 04:34:58,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888396714] [2020-10-13 04:34:58,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:34:58,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:34:58,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24460835] [2020-10-13 04:34:58,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:34:58,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:34:58,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:34:58,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:34:58,186 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 24 states. [2020-10-13 04:35:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:00,006 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-13 04:35:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:35:00,007 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 40 [2020-10-13 04:35:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:00,010 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:35:00,010 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 04:35:00,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:35:00,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 04:35:00,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-10-13 04:35:00,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:35:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-13 04:35:00,027 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2020-10-13 04:35:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:00,028 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-13 04:35:00,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:35:00,028 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-13 04:35:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:35:00,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:00,029 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:00,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:35:00,031 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:00,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1837217879, now seen corresponding path program 9 times [2020-10-13 04:35:00,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:00,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337608318] [2020-10-13 04:35:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:00,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:00,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:02,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:02,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:35:02,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:35:02,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2150 [2020-10-13 04:35:02,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:02,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:35:02,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:02,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:35:02,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:35:02,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:02,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:02,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:02,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:02,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:02,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:35:02,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:02,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:02,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:02,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:02,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:35:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 04:35:02,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337608318] [2020-10-13 04:35:02,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:02,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:35:02,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672544845] [2020-10-13 04:35:02,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:35:02,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:02,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:35:02,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:35:02,372 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 14 states. [2020-10-13 04:35:02,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:02,750 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-10-13 04:35:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:35:02,751 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-13 04:35:02,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:02,752 INFO L225 Difference]: With dead ends: 92 [2020-10-13 04:35:02,752 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 04:35:02,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:35:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 04:35:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-10-13 04:35:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 04:35:02,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-13 04:35:02,768 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-10-13 04:35:02,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:02,769 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-13 04:35:02,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:35:02,769 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-13 04:35:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:35:02,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:02,772 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:02,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:35:02,772 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:02,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:02,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1159040441, now seen corresponding path program 10 times [2020-10-13 04:35:02,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:02,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594785024] [2020-10-13 04:35:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:02,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:02,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:04,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:04,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:35:04,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:35:04,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1920 [2020-10-13 04:35:04,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:04,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:35:04,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 04:35:04,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:35:04,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:04,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:04,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:04,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:04,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:04,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:04,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:35:04,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:04,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:35:04,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594785024] [2020-10-13 04:35:04,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:04,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:35:04,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545310544] [2020-10-13 04:35:04,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:35:04,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:04,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:35:04,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:35:04,844 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 14 states. [2020-10-13 04:35:05,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:05,176 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-13 04:35:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:35:05,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-13 04:35:05,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:05,178 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:35:05,178 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 04:35:05,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:35:05,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 04:35:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 04:35:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 04:35:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-13 04:35:05,192 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-10-13 04:35:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:05,192 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-13 04:35:05,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:35:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-13 04:35:05,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 04:35:05,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:05,193 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:05,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:35:05,194 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:05,195 INFO L82 PathProgramCache]: Analyzing trace with hash -427995931, now seen corresponding path program 11 times [2020-10-13 04:35:05,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:05,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482855055] [2020-10-13 04:35:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:05,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:05,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:06,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:07,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:07,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:08,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:08,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:08,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:09,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:09,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:10,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:10,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:10,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 04:35:10,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 04:35:10,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 04:35:10,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:10,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:35:10,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:10,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 04:35:10,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:35:12,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:12,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:12,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:12,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:12,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:12,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:35:12,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:12,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:12,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:12,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:12,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:35:12,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482855055] [2020-10-13 04:35:12,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:12,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:35:12,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770878649] [2020-10-13 04:35:12,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:35:12,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:12,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:35:12,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:35:12,710 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 33 states. [2020-10-13 04:35:13,051 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 73 [2020-10-13 04:35:13,383 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-13 04:35:14,573 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 90 [2020-10-13 04:35:15,079 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 120 [2020-10-13 04:35:15,360 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-13 04:35:16,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:16,408 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2020-10-13 04:35:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:35:16,409 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 46 [2020-10-13 04:35:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:16,410 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:35:16,411 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 04:35:16,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=369, Invalid=2387, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 04:35:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 04:35:16,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-10-13 04:35:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:35:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-13 04:35:16,422 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 46 [2020-10-13 04:35:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:16,422 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-13 04:35:16,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:35:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-13 04:35:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 04:35:16,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:16,423 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:16,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:35:16,424 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:16,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:16,424 INFO L82 PathProgramCache]: Analyzing trace with hash 662743107, now seen corresponding path program 12 times [2020-10-13 04:35:16,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:16,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179005823] [2020-10-13 04:35:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:16,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:16,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:18,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:18,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 04:35:18,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:35:18,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1937 [2020-10-13 04:35:18,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:35:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:35:18,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:18,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:18,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:18,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:18,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:18,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:18,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:35:18,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:18,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:18,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:18,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:18,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:35:18,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179005823] [2020-10-13 04:35:18,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:18,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:35:18,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153389453] [2020-10-13 04:35:18,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:35:18,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:18,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:35:18,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:35:18,536 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 16 states. [2020-10-13 04:35:18,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:18,925 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-10-13 04:35:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:35:18,926 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-13 04:35:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:18,927 INFO L225 Difference]: With dead ends: 104 [2020-10-13 04:35:18,927 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 04:35:18,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:35:18,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 04:35:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-10-13 04:35:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 04:35:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-13 04:35:18,946 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 48 [2020-10-13 04:35:18,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:18,946 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-13 04:35:18,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:35:18,946 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-13 04:35:18,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 04:35:18,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:18,948 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:18,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:35:18,948 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:18,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:18,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1366751363, now seen corresponding path program 13 times [2020-10-13 04:35:18,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:18,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720402842] [2020-10-13 04:35:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:18,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:19,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:19,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:20,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:20,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:22,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:22,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:22,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:23,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:23,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:23,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:23,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 04:35:23,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 04:35:23,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:35:23,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:23,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:35:23,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:23,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:35:23,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:35:24,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:24,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:24,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:24,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:24,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:24,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:35:24,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:24,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:24,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:24,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:24,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:35:24,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720402842] [2020-10-13 04:35:24,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:24,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:35:24,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873458133] [2020-10-13 04:35:24,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:35:24,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:24,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:35:24,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:35:24,127 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 16 states. [2020-10-13 04:35:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:24,653 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-10-13 04:35:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:35:24,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-13 04:35:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:24,655 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:35:24,656 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 04:35:24,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:35:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 04:35:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-13 04:35:24,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 04:35:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-13 04:35:24,681 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2020-10-13 04:35:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:24,682 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-13 04:35:24,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:35:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-13 04:35:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:35:24,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:24,684 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:24,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:35:24,685 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:24,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:24,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1060937855, now seen corresponding path program 14 times [2020-10-13 04:35:24,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:24,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68103320] [2020-10-13 04:35:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:24,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:25,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:25,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:25,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:26,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:26,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:27,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:27,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:28,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:29,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:29,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:29,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:29,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:35:29,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 04:35:29,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:35:29,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:29,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:35:29,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:29,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 04:35:29,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:30,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:30,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:30,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:30,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:30,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:30,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:35:30,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:30,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:30,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:30,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:30,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:35:30,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68103320] [2020-10-13 04:35:30,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:30,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:35:30,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198837564] [2020-10-13 04:35:31,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:35:31,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:31,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:35:31,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:35:31,002 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 31 states. [2020-10-13 04:35:33,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:33,368 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-13 04:35:33,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:35:33,369 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 52 [2020-10-13 04:35:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:33,370 INFO L225 Difference]: With dead ends: 74 [2020-10-13 04:35:33,370 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 04:35:33,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=174, Invalid=2178, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 04:35:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 04:35:33,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2020-10-13 04:35:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:35:33,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-13 04:35:33,381 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 52 [2020-10-13 04:35:33,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:33,382 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-13 04:35:33,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:35:33,382 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-13 04:35:33,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:35:33,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:33,383 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:33,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:35:33,383 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:33,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:33,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1857131171, now seen corresponding path program 15 times [2020-10-13 04:35:33,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:33,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623142062] [2020-10-13 04:35:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:33,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:33,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:36,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:36,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 04:35:36,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:35:36,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2862 [2020-10-13 04:35:36,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:35:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:35:36,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:36,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:36,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:36,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:36,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:36,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:36,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:35:36,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:36,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:36,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:36,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:36,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:35:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:35:36,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623142062] [2020-10-13 04:35:36,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:36,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:35:36,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78450043] [2020-10-13 04:35:36,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:35:36,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:36,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:35:36,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:35:36,500 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 18 states. [2020-10-13 04:35:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:37,063 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-10-13 04:35:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:35:37,063 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-13 04:35:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:37,064 INFO L225 Difference]: With dead ends: 116 [2020-10-13 04:35:37,064 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:35:37,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:35:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:35:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2020-10-13 04:35:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 04:35:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-13 04:35:37,076 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2020-10-13 04:35:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:37,076 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-13 04:35:37,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:35:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-13 04:35:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:35:37,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:37,077 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:37,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:35:37,078 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:37,078 INFO L82 PathProgramCache]: Analyzing trace with hash 732535547, now seen corresponding path program 16 times [2020-10-13 04:35:37,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:37,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234101920] [2020-10-13 04:35:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:37,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:37,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:40,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:40,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:35:40,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:35:40,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3422 [2020-10-13 04:35:40,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:40,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:35:40,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 04:35:40,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:35:40,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:40,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:40,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:40,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:40,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:40,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:40,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:35:40,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:40,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:40,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:40,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:40,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:35:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 04:35:40,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234101920] [2020-10-13 04:35:40,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:40,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:35:40,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878872477] [2020-10-13 04:35:40,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:35:40,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:40,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:35:40,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:35:40,731 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 18 states. [2020-10-13 04:35:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:41,609 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-13 04:35:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:35:41,610 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2020-10-13 04:35:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:41,612 INFO L225 Difference]: With dead ends: 64 [2020-10-13 04:35:41,612 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:35:41,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:35:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:35:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 04:35:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 04:35:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-13 04:35:41,637 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2020-10-13 04:35:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:41,640 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-13 04:35:41,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:35:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-13 04:35:41,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 04:35:41,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:41,645 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:41,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:35:41,646 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:41,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:41,646 INFO L82 PathProgramCache]: Analyzing trace with hash 605362329, now seen corresponding path program 17 times [2020-10-13 04:35:41,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:41,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923628015] [2020-10-13 04:35:41,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:41,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:42,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:43,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:43,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:43,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:44,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:44,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:45,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:45,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:45,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:46,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:46,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:46,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:46,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 04:35:46,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 04:35:46,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:35:46,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:35:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 04:35:46,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:49,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:49,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:49,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:49,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:49,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:49,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:35:49,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:49,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:49,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:49,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:49,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 04:35:49,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923628015] [2020-10-13 04:35:49,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:49,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:35:49,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298059747] [2020-10-13 04:35:49,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:35:49,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:49,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:35:49,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1178, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:35:49,589 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 36 states. [2020-10-13 04:35:52,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:52,622 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2020-10-13 04:35:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:35:52,622 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 58 [2020-10-13 04:35:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:52,623 INFO L225 Difference]: With dead ends: 83 [2020-10-13 04:35:52,623 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 04:35:52,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=199, Invalid=2771, Unknown=0, NotChecked=0, Total=2970 [2020-10-13 04:35:52,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 04:35:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2020-10-13 04:35:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:35:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-13 04:35:52,634 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 58 [2020-10-13 04:35:52,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:52,635 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-13 04:35:52,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:35:52,635 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-13 04:35:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 04:35:52,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:52,636 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:52,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:35:52,636 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:52,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:52,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1409431287, now seen corresponding path program 18 times [2020-10-13 04:35:52,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:52,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609150716] [2020-10-13 04:35:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:52,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:52,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:57,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:57,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 04:35:57,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:35:57,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:35:57,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:57,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:35:57,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:35:57,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:35:57,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:35:57,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:35:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:57,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:57,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:35:57,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:35:57,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:35:57,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:35:57,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:35:57,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:35:57,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:35:57,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:35:57,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:35:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 04:35:57,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609150716] [2020-10-13 04:35:57,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:35:57,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:35:57,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797583406] [2020-10-13 04:35:57,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:35:57,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:35:57,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:35:57,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:35:57,923 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 20 states. [2020-10-13 04:35:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:35:58,624 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-10-13 04:35:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:35:58,627 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-10-13 04:35:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:35:58,628 INFO L225 Difference]: With dead ends: 128 [2020-10-13 04:35:58,628 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 04:35:58,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:35:58,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 04:35:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-10-13 04:35:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 04:35:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-13 04:35:58,645 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2020-10-13 04:35:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:35:58,646 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-13 04:35:58,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:35:58,646 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-13 04:35:58,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 04:35:58,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:35:58,647 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:35:58,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:35:58,649 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:35:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:35:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1667221995, now seen corresponding path program 19 times [2020-10-13 04:35:58,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:35:58,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752676214] [2020-10-13 04:35:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:35:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:35:58,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:35:58,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:03,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:03,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 04:36:03,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:36:03,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:36:03,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:36:03,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 04:36:03,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:36:03,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:03,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:36:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:03,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:03,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:03,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:36:03,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:36:03,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:36:03,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:03,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:36:03,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:36:03,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:36:03,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 04:36:03,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752676214] [2020-10-13 04:36:03,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:36:03,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:36:03,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63967933] [2020-10-13 04:36:03,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:36:03,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:36:03,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:36:03,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:36:03,913 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 20 states. [2020-10-13 04:36:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:36:04,726 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-13 04:36:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:36:04,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-10-13 04:36:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:36:04,729 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:36:04,729 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 04:36:04,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=304, Invalid=1028, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:36:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 04:36:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 04:36:04,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 04:36:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-13 04:36:04,740 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2020-10-13 04:36:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:36:04,740 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-13 04:36:04,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:36:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-13 04:36:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 04:36:04,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:36:04,741 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:36:04,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:36:04,741 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:36:04,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:36:04,741 INFO L82 PathProgramCache]: Analyzing trace with hash 835802419, now seen corresponding path program 20 times [2020-10-13 04:36:04,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:36:04,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016187280] [2020-10-13 04:36:04,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:36:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:04,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:05,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:06,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:06,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:06,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:07,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:07,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:08,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:08,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:08,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:09,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:09,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:09,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:09,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 04:36:09,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 04:36:09,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:36:09,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:09,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 04:36:09,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:36:09,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 04:36:09,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:14,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:36:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:14,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:14,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:14,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:36:14,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:36:14,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:36:14,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:14,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:36:14,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:36:14,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:36:14,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 42 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:36:14,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016187280] [2020-10-13 04:36:14,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:36:14,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 04:36:14,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995607658] [2020-10-13 04:36:14,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 04:36:14,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:36:14,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 04:36:14,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1955, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:36:14,770 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 48 states. [2020-10-13 04:36:18,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:36:18,931 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2020-10-13 04:36:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 04:36:18,931 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 64 [2020-10-13 04:36:18,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:36:18,932 INFO L225 Difference]: With dead ends: 115 [2020-10-13 04:36:18,932 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 04:36:18,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=564, Invalid=3726, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 04:36:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 04:36:18,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 70. [2020-10-13 04:36:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 04:36:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-13 04:36:18,944 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 64 [2020-10-13 04:36:18,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:36:18,944 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-13 04:36:18,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 04:36:18,944 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-13 04:36:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:36:18,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:36:18,945 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:36:18,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:36:18,945 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:36:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:36:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1933485329, now seen corresponding path program 21 times [2020-10-13 04:36:18,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:36:18,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071695284] [2020-10-13 04:36:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:36:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:18,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:19,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:23,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:23,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:36:23,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:36:23,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4269 [2020-10-13 04:36:23,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:23,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:36:23,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:36:23,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:36:23,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:23,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:36:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:23,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:23,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:23,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:36:23,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:36:23,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:36:23,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:23,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:36:23,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:36:23,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:36:23,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:36:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 04:36:23,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071695284] [2020-10-13 04:36:23,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:36:23,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:36:23,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000885812] [2020-10-13 04:36:23,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:36:23,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:36:23,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:36:23,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:36:23,602 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 22 states. [2020-10-13 04:36:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:36:24,474 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-10-13 04:36:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:36:24,475 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 66 [2020-10-13 04:36:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:36:24,476 INFO L225 Difference]: With dead ends: 140 [2020-10-13 04:36:24,476 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 04:36:24,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:36:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 04:36:24,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-10-13 04:36:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 04:36:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-10-13 04:36:24,491 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 66 [2020-10-13 04:36:24,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:36:24,491 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-10-13 04:36:24,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:36:24,491 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-10-13 04:36:24,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:36:24,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:36:24,492 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:36:24,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:36:24,493 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:36:24,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:36:24,493 INFO L82 PathProgramCache]: Analyzing trace with hash -285305519, now seen corresponding path program 22 times [2020-10-13 04:36:24,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:36:24,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406318694] [2020-10-13 04:36:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:36:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:24,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:24,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:25,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:25,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:28,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:28,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:29,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:29,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:36:29,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:36:29,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:36:29,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:29,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:36:29,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:36:29,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:36:29,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:29,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:36:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:29,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:29,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:29,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:36:29,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:36:29,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:36:29,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:29,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:36:29,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:36:29,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:36:29,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:36:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 04:36:29,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406318694] [2020-10-13 04:36:29,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:36:29,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:36:29,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843759372] [2020-10-13 04:36:29,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:36:29,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:36:29,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:36:29,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:36:29,911 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 22 states. [2020-10-13 04:36:31,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:36:31,388 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-10-13 04:36:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:36:31,389 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 66 [2020-10-13 04:36:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:36:31,390 INFO L225 Difference]: With dead ends: 94 [2020-10-13 04:36:31,391 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 04:36:31,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:36:31,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 04:36:31,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-13 04:36:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 04:36:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-13 04:36:31,410 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2020-10-13 04:36:31,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:36:31,411 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-13 04:36:31,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:36:31,411 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-13 04:36:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 04:36:31,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:36:31,412 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:36:31,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:36:31,413 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:36:31,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:36:31,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1060899251, now seen corresponding path program 23 times [2020-10-13 04:36:31,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:36:31,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381533293] [2020-10-13 04:36:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:36:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:31,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:32,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:33,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:33,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:34,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:34,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:35,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:36,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:36,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 04:36:36,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:36:36,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:36:36,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:36,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:36:36,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:36:36,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 04:36:36,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:39,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:36:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:39,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:39,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:39,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:36:39,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:36:39,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:36:39,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:39,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:36:39,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:36:39,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:36:39,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 04:36:39,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381533293] [2020-10-13 04:36:39,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:36:39,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:36:39,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576207480] [2020-10-13 04:36:39,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:36:39,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:36:39,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:36:39,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1714, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:36:39,902 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 43 states. [2020-10-13 04:36:46,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:36:46,029 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-10-13 04:36:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 04:36:46,030 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 70 [2020-10-13 04:36:46,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:36:46,031 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:36:46,031 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 04:36:46,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=264, Invalid=4566, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 04:36:46,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 04:36:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-10-13 04:36:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:36:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-13 04:36:46,045 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 70 [2020-10-13 04:36:46,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:36:46,045 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-13 04:36:46,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:36:46,046 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-13 04:36:46,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 04:36:46,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:36:46,046 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:36:46,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:36:46,047 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:36:46,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:36:46,047 INFO L82 PathProgramCache]: Analyzing trace with hash 741234603, now seen corresponding path program 24 times [2020-10-13 04:36:46,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:36:46,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877901319] [2020-10-13 04:36:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:36:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:46,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:46,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:51,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:51,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 04:36:51,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:36:51,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:36:51,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:51,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:36:51,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:36:51,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:36:51,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:51,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:36:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:51,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:51,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:51,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:36:51,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:36:51,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:36:51,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:51,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:36:51,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:36:51,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:36:51,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 04:36:51,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877901319] [2020-10-13 04:36:51,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:36:51,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:36:51,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724122028] [2020-10-13 04:36:51,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:36:51,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:36:51,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:36:51,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:36:51,434 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 24 states. [2020-10-13 04:36:52,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:36:52,183 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2020-10-13 04:36:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:36:52,185 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 72 [2020-10-13 04:36:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:36:52,186 INFO L225 Difference]: With dead ends: 152 [2020-10-13 04:36:52,186 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 04:36:52,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:36:52,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 04:36:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-10-13 04:36:52,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 04:36:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-13 04:36:52,197 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2020-10-13 04:36:52,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:36:52,197 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-13 04:36:52,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:36:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-13 04:36:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 04:36:52,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:36:52,198 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:36:52,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:36:52,198 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:36:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:36:52,199 INFO L82 PathProgramCache]: Analyzing trace with hash -400516663, now seen corresponding path program 25 times [2020-10-13 04:36:52,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:36:52,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963451308] [2020-10-13 04:36:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:36:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:52,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:52,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:57,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:57,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 04:36:57,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:36:57,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:36:57,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:57,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:36:57,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 04:36:57,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:36:57,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:57,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:36:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:57,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:57,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:36:57,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:36:57,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:36:57,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:36:57,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:36:57,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:36:57,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:36:57,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:36:57,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:36:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 04:36:57,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963451308] [2020-10-13 04:36:57,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:36:57,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:36:57,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429134253] [2020-10-13 04:36:57,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:36:57,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:36:57,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:36:57,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:36:57,584 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 24 states. [2020-10-13 04:36:58,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:36:58,786 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-13 04:36:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:36:58,787 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 74 [2020-10-13 04:36:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:36:58,788 INFO L225 Difference]: With dead ends: 82 [2020-10-13 04:36:58,788 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 04:36:58,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=447, Invalid=1533, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:36:58,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 04:36:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-13 04:36:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 04:36:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-13 04:36:58,802 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2020-10-13 04:36:58,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:36:58,802 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-13 04:36:58,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:36:58,802 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-13 04:36:58,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 04:36:58,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:36:58,803 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:36:58,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:36:58,803 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:36:58,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:36:58,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1631085593, now seen corresponding path program 26 times [2020-10-13 04:36:58,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:36:58,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399527170] [2020-10-13 04:36:58,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:36:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:36:58,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:36:59,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:00,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:01,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:01,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:02,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:03,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:03,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:03,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 04:37:03,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:37:03,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:37:03,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:03,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 04:37:03,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:37:03,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 04:37:03,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:05,895 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-13 04:37:06,091 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-13 04:37:06,324 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-13 04:37:06,560 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-13 04:37:06,833 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-13 04:37:10,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:37:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:10,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:10,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:10,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:37:10,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:37:10,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:37:10,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:10,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:37:10,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:37:10,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:37:10,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 49 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:37:10,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399527170] [2020-10-13 04:37:10,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:37:10,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 04:37:10,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89837705] [2020-10-13 04:37:10,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 04:37:10,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:37:10,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 04:37:10,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=2944, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 04:37:10,486 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 58 states. [2020-10-13 04:37:11,124 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-13 04:37:13,931 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-13 04:37:14,217 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-13 04:37:14,560 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-13 04:37:18,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:37:18,011 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-10-13 04:37:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 04:37:18,012 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 76 [2020-10-13 04:37:18,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:37:18,013 INFO L225 Difference]: With dead ends: 133 [2020-10-13 04:37:18,014 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 04:37:18,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=730, Invalid=6410, Unknown=0, NotChecked=0, Total=7140 [2020-10-13 04:37:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 04:37:18,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 104. [2020-10-13 04:37:18,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:37:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-10-13 04:37:18,037 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 76 [2020-10-13 04:37:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:37:18,037 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-10-13 04:37:18,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 04:37:18,038 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-10-13 04:37:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:37:18,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:37:18,038 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:37:18,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:37:18,039 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:37:18,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:37:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1203146373, now seen corresponding path program 27 times [2020-10-13 04:37:18,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:37:18,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247173874] [2020-10-13 04:37:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:37:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:18,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:18,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:23,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:23,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:37:23,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:37:23,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:37:23,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:23,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:37:23,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 04:37:23,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:37:23,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:23,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:37:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:23,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:23,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:23,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:37:23,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:37:23,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:37:23,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:23,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:37:23,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:37:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:37:23,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:37:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 04:37:23,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247173874] [2020-10-13 04:37:23,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:37:23,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:37:23,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003113150] [2020-10-13 04:37:23,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:37:23,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:37:23,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:37:23,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:37:23,663 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 26 states. [2020-10-13 04:37:24,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:37:24,834 INFO L93 Difference]: Finished difference Result 188 states and 195 transitions. [2020-10-13 04:37:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:37:24,835 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 78 [2020-10-13 04:37:24,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:37:24,840 INFO L225 Difference]: With dead ends: 188 [2020-10-13 04:37:24,840 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 04:37:24,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:37:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 04:37:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2020-10-13 04:37:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 04:37:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-10-13 04:37:24,854 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 78 [2020-10-13 04:37:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:37:24,855 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-10-13 04:37:24,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:37:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-10-13 04:37:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:37:24,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:37:24,856 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:37:24,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:37:24,856 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:37:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:37:24,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1250975995, now seen corresponding path program 28 times [2020-10-13 04:37:24,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:37:24,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251165092] [2020-10-13 04:37:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:37:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:24,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:25,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:25,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:27,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:28,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:29,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:29,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:37:29,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:37:29,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:37:29,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:29,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:37:29,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:37:29,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:37:29,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:30,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:37:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:30,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:30,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:30,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:37:30,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:37:30,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:37:30,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:30,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:37:30,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:37:30,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:37:30,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 04:37:30,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251165092] [2020-10-13 04:37:30,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:37:30,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:37:30,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954403132] [2020-10-13 04:37:30,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:37:30,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:37:30,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:37:30,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:37:30,411 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 26 states. [2020-10-13 04:37:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:37:32,137 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2020-10-13 04:37:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:37:32,138 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 78 [2020-10-13 04:37:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:37:32,139 INFO L225 Difference]: With dead ends: 110 [2020-10-13 04:37:32,139 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 04:37:32,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=529, Invalid=1823, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 04:37:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 04:37:32,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-13 04:37:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 04:37:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-13 04:37:32,152 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 78 [2020-10-13 04:37:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:37:32,153 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-13 04:37:32,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:37:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-13 04:37:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:37:32,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:37:32,153 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:37:32,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:37:32,154 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:37:32,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:37:32,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1228858881, now seen corresponding path program 29 times [2020-10-13 04:37:32,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:37:32,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746936255] [2020-10-13 04:37:32,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:37:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:32,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:33,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:34,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:35,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:36,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:37,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:37,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:37:37,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:37:37,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:37:37,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:37,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 04:37:37,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:37:37,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 04:37:37,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:44,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:37:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:44,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:44,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:44,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:37:44,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:37:44,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:37:44,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:44,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:37:44,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:37:44,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:37:44,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 04:37:44,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746936255] [2020-10-13 04:37:44,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:37:44,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 04:37:44,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728491401] [2020-10-13 04:37:44,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 04:37:44,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:37:44,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 04:37:44,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2348, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 04:37:44,216 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 50 states. [2020-10-13 04:37:49,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:37:49,526 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2020-10-13 04:37:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 04:37:49,528 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 82 [2020-10-13 04:37:49,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:37:49,530 INFO L225 Difference]: With dead ends: 114 [2020-10-13 04:37:49,530 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 04:37:49,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=112, Invalid=2540, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 04:37:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 04:37:49,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2020-10-13 04:37:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:37:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-10-13 04:37:49,548 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 82 [2020-10-13 04:37:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:37:49,548 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-10-13 04:37:49,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 04:37:49,549 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-10-13 04:37:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:37:49,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:37:49,550 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:37:49,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:37:49,550 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:37:49,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:37:49,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1534724703, now seen corresponding path program 30 times [2020-10-13 04:37:49,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:37:49,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127436117] [2020-10-13 04:37:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:37:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:49,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:50,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:54,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:54,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:37:54,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:37:54,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:37:54,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:54,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:37:54,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:37:54,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:37:54,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:55,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:37:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:55,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:55,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:37:55,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:37:55,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:37:55,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:37:55,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:37:55,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:37:55,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:37:55,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:37:55,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:37:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 04:37:55,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127436117] [2020-10-13 04:37:55,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:37:55,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:37:55,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909989553] [2020-10-13 04:37:55,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:37:55,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:37:55,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:37:55,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:37:55,351 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 28 states. [2020-10-13 04:37:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:37:56,836 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2020-10-13 04:37:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:37:56,838 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 84 [2020-10-13 04:37:56,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:37:56,840 INFO L225 Difference]: With dead ends: 176 [2020-10-13 04:37:56,840 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 04:37:56,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:37:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 04:37:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-10-13 04:37:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 04:37:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-13 04:37:56,852 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2020-10-13 04:37:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:37:56,853 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-13 04:37:56,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:37:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-13 04:37:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 04:37:56,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:37:56,854 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:37:56,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:37:56,854 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:37:56,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:37:56,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2004094845, now seen corresponding path program 31 times [2020-10-13 04:37:56,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:37:56,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150029320] [2020-10-13 04:37:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:37:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:37:56,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:37:56,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking...