/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 01:57:24,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 01:57:24,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 01:57:24,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 01:57:24,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 01:57:24,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 01:57:24,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 01:57:24,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 01:57:24,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 01:57:24,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 01:57:24,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 01:57:24,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 01:57:24,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 01:57:24,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 01:57:24,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 01:57:24,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 01:57:24,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 01:57:24,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 01:57:24,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 01:57:24,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 01:57:24,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 01:57:24,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 01:57:24,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 01:57:24,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 01:57:24,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 01:57:24,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 01:57:24,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 01:57:24,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 01:57:24,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 01:57:24,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 01:57:24,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 01:57:24,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 01:57:24,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 01:57:24,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 01:57:24,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 01:57:24,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 01:57:24,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 01:57:24,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 01:57:24,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 01:57:24,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 01:57:24,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 01:57:24,198 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 [2020-10-15 01:57:24,218 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 01:57:24,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 01:57:24,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 01:57:24,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 01:57:24,223 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 01:57:24,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 01:57:24,223 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 01:57:24,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 01:57:24,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 01:57:24,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 01:57:24,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 01:57:24,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 01:57:24,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 01:57:24,225 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 01:57:24,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 01:57:24,225 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 01:57:24,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 01:57:24,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 01:57:24,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 01:57:24,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 01:57:24,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 01:57:24,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 01:57:24,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 01:57:24,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 01:57:24,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 01:57:24,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 01:57:24,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 01:57:24,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 01:57:24,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 01:57:24,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 01:57:24,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 01:57:24,521 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 01:57:24,524 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 01:57:24,526 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 01:57:24,526 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 01:57:24,527 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2020-10-15 01:57:24,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62cc561fd/32b274aa5e9d4ade92778851f9903f31/FLAG46af23ec5 [2020-10-15 01:57:25,115 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 01:57:25,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2020-10-15 01:57:25,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62cc561fd/32b274aa5e9d4ade92778851f9903f31/FLAG46af23ec5 [2020-10-15 01:57:25,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62cc561fd/32b274aa5e9d4ade92778851f9903f31 [2020-10-15 01:57:25,426 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 01:57:25,428 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 01:57:25,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 01:57:25,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 01:57:25,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 01:57:25,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:57:25" (1/1) ... [2020-10-15 01:57:25,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee4d01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:57:25, skipping insertion in model container [2020-10-15 01:57:25,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:57:25" (1/1) ... [2020-10-15 01:57:25,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 01:57:25,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 01:57:25,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 01:57:25,792 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 01:57:26,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 01:57:26,034 INFO L208 MainTranslator]: Completed translation [2020-10-15 01:57:26,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:57:26 WrapperNode [2020-10-15 01:57:26,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 01:57:26,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 01:57:26,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 01:57:26,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 01:57:26,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:57:26" (1/1) ... [2020-10-15 01:57:26,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:57:26" (1/1) ... [2020-10-15 01:57:26,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:57:26" (1/1) ... [2020-10-15 01:57:26,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:57:26" (1/1) ... [2020-10-15 01:57:26,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:57:26" (1/1) ... [2020-10-15 01:57:26,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:57:26" (1/1) ... [2020-10-15 01:57:26,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:57:26" (1/1) ... [2020-10-15 01:57:26,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 01:57:26,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 01:57:26,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 01:57:26,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 01:57:26,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:57:26" (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 [2020-10-15 01:57:26,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 01:57:26,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 01:57:26,208 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 01:57:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-15 01:57:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 01:57:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 01:57:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 01:57:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 01:57:27,176 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 01:57:27,177 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-15 01:57:27,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:57:27 BoogieIcfgContainer [2020-10-15 01:57:27,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 01:57:27,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 01:57:27,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 01:57:27,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 01:57:27,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:57:25" (1/3) ... [2020-10-15 01:57:27,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556f78ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:57:27, skipping insertion in model container [2020-10-15 01:57:27,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:57:26" (2/3) ... [2020-10-15 01:57:27,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556f78ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:57:27, skipping insertion in model container [2020-10-15 01:57:27,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:57:27" (3/3) ... [2020-10-15 01:57:27,200 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-1.c [2020-10-15 01:57:27,212 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 01:57:27,223 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 01:57:27,237 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 01:57:27,261 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 01:57:27,261 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 01:57:27,262 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 01:57:27,262 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 01:57:27,262 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 01:57:27,263 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 01:57:27,263 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 01:57:27,263 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 01:57:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-15 01:57:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 01:57:27,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:27,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:27,290 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:27,297 INFO L82 PathProgramCache]: Analyzing trace with hash 919157391, now seen corresponding path program 1 times [2020-10-15 01:57:27,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:27,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511120519] [2020-10-15 01:57:27,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:27,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:27,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:27,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:27,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-15 01:57:27,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 01:57:27,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-15 01:57:27,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:27,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:27,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 01:57:27,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 01:57:27,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-15 01:57:27,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 01:57:27,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:27,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:27,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:27,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:27,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:27,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 01:57:27,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:27,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:27,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:27,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:27,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:27,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:57:27,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511120519] [2020-10-15 01:57:27,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 01:57:27,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 01:57:27,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230147258] [2020-10-15 01:57:27,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 01:57:27,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:27,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 01:57:27,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 01:57:27,796 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 4 states. [2020-10-15 01:57:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:28,507 INFO L93 Difference]: Finished difference Result 331 states and 635 transitions. [2020-10-15 01:57:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 01:57:28,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-15 01:57:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:28,524 INFO L225 Difference]: With dead ends: 331 [2020-10-15 01:57:28,524 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 01:57:28,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 01:57:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 182. [2020-10-15 01:57:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-15 01:57:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 314 transitions. [2020-10-15 01:57:28,586 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 314 transitions. Word has length 14 [2020-10-15 01:57:28,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:28,587 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 314 transitions. [2020-10-15 01:57:28,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 01:57:28,587 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 314 transitions. [2020-10-15 01:57:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 01:57:28,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:28,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:28,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 01:57:28,589 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:28,590 INFO L82 PathProgramCache]: Analyzing trace with hash 736602936, now seen corresponding path program 1 times [2020-10-15 01:57:28,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:28,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580362257] [2020-10-15 01:57:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:28,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:28,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:28,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:28,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 01:57:28,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 01:57:28,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-15 01:57:28,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:28,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:28,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 01:57:28,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 01:57:28,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 01:57:28,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:28,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:28,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:28,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:28,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:28,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:28,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 01:57:28,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:28,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:28,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:28,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:28,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:28,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:57:28,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580362257] [2020-10-15 01:57:28,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 01:57:28,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 01:57:28,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951962701] [2020-10-15 01:57:28,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 01:57:28,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:28,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 01:57:28,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 01:57:28,783 INFO L87 Difference]: Start difference. First operand 182 states and 314 transitions. Second operand 4 states. [2020-10-15 01:57:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:29,144 INFO L93 Difference]: Finished difference Result 365 states and 632 transitions. [2020-10-15 01:57:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 01:57:29,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-15 01:57:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:29,147 INFO L225 Difference]: With dead ends: 365 [2020-10-15 01:57:29,147 INFO L226 Difference]: Without dead ends: 189 [2020-10-15 01:57:29,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:29,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-15 01:57:29,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2020-10-15 01:57:29,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-15 01:57:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 322 transitions. [2020-10-15 01:57:29,164 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 322 transitions. Word has length 15 [2020-10-15 01:57:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:29,164 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 322 transitions. [2020-10-15 01:57:29,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 01:57:29,165 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 322 transitions. [2020-10-15 01:57:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 01:57:29,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:29,166 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:29,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 01:57:29,166 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:29,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:29,167 INFO L82 PathProgramCache]: Analyzing trace with hash 816788357, now seen corresponding path program 1 times [2020-10-15 01:57:29,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:29,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086340829] [2020-10-15 01:57:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:29,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:29,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:29,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 01:57:29,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:29,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-15 01:57:29,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:29,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:29,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 01:57:29,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:29,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 01:57:29,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:29,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:29,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:29,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:29,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:29,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:29,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 01:57:29,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:29,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:29,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:29,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:29,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:29,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:57:29,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086340829] [2020-10-15 01:57:29,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 01:57:29,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 01:57:29,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783501096] [2020-10-15 01:57:29,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 01:57:29,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:29,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 01:57:29,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 01:57:29,419 INFO L87 Difference]: Start difference. First operand 189 states and 322 transitions. Second operand 4 states. [2020-10-15 01:57:29,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:29,929 INFO L93 Difference]: Finished difference Result 290 states and 484 transitions. [2020-10-15 01:57:29,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 01:57:29,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-15 01:57:29,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:29,932 INFO L225 Difference]: With dead ends: 290 [2020-10-15 01:57:29,932 INFO L226 Difference]: Without dead ends: 274 [2020-10-15 01:57:29,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-15 01:57:29,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 259. [2020-10-15 01:57:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-15 01:57:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 436 transitions. [2020-10-15 01:57:29,949 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 436 transitions. Word has length 21 [2020-10-15 01:57:29,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:29,949 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 436 transitions. [2020-10-15 01:57:29,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 01:57:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 436 transitions. [2020-10-15 01:57:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 01:57:29,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:29,951 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] [2020-10-15 01:57:29,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 01:57:29,952 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:29,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1993084704, now seen corresponding path program 1 times [2020-10-15 01:57:29,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:29,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752652134] [2020-10-15 01:57:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:29,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:29,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:30,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:30,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-15 01:57:30,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 01:57:30,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-15 01:57:30,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:30,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:30,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 01:57:30,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:30,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 01:57:30,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:30,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:30,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:30,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:30,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:30,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:30,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 01:57:30,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:30,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:30,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:30,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:30,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:30,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 01:57:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:57:30,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752652134] [2020-10-15 01:57:30,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 01:57:30,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 01:57:30,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269857886] [2020-10-15 01:57:30,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 01:57:30,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:30,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 01:57:30,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 01:57:30,091 INFO L87 Difference]: Start difference. First operand 259 states and 436 transitions. Second operand 4 states. [2020-10-15 01:57:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:30,390 INFO L93 Difference]: Finished difference Result 483 states and 818 transitions. [2020-10-15 01:57:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 01:57:30,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-15 01:57:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:30,393 INFO L225 Difference]: With dead ends: 483 [2020-10-15 01:57:30,393 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 01:57:30,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:30,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 01:57:30,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2020-10-15 01:57:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-15 01:57:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 376 transitions. [2020-10-15 01:57:30,407 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 376 transitions. Word has length 22 [2020-10-15 01:57:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:30,407 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 376 transitions. [2020-10-15 01:57:30,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 01:57:30,408 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 376 transitions. [2020-10-15 01:57:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 01:57:30,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:30,409 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:30,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 01:57:30,410 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:30,410 INFO L82 PathProgramCache]: Analyzing trace with hash -365898165, now seen corresponding path program 1 times [2020-10-15 01:57:30,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:30,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988530270] [2020-10-15 01:57:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:30,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:30,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:30,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:30,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 01:57:30,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 01:57:30,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-15 01:57:30,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:30,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:30,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 01:57:30,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:30,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-15 01:57:30,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:30,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:30,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:30,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:30,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:30,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:30,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:57:30,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:30,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:30,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:30,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:30,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:30,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:57:30,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988530270] [2020-10-15 01:57:30,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:30,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 01:57:30,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355482001] [2020-10-15 01:57:30,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 01:57:30,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:30,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 01:57:30,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:30,699 INFO L87 Difference]: Start difference. First operand 229 states and 376 transitions. Second operand 5 states. [2020-10-15 01:57:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:31,457 INFO L93 Difference]: Finished difference Result 591 states and 961 transitions. [2020-10-15 01:57:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 01:57:31,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-15 01:57:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:31,462 INFO L225 Difference]: With dead ends: 591 [2020-10-15 01:57:31,462 INFO L226 Difference]: Without dead ends: 365 [2020-10-15 01:57:31,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 01:57:31,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-15 01:57:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 311. [2020-10-15 01:57:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-15 01:57:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 526 transitions. [2020-10-15 01:57:31,481 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 526 transitions. Word has length 28 [2020-10-15 01:57:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:31,482 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 526 transitions. [2020-10-15 01:57:31,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 01:57:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 526 transitions. [2020-10-15 01:57:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 01:57:31,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:31,484 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] [2020-10-15 01:57:31,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 01:57:31,484 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:31,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1409109197, now seen corresponding path program 1 times [2020-10-15 01:57:31,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:31,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038145575] [2020-10-15 01:57:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:31,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:31,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:31,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 01:57:31,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:31,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-15 01:57:31,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:31,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 01:57:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-15 01:57:31,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 01:57:31,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:31,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:31,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:31,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:31,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:31,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:31,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:57:31,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:31,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:31,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:31,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:31,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:31,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 01:57:31,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038145575] [2020-10-15 01:57:31,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 01:57:31,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 01:57:31,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194043775] [2020-10-15 01:57:31,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 01:57:31,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:31,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 01:57:31,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 01:57:31,630 INFO L87 Difference]: Start difference. First operand 311 states and 526 transitions. Second operand 4 states. [2020-10-15 01:57:31,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:31,774 INFO L93 Difference]: Finished difference Result 575 states and 971 transitions. [2020-10-15 01:57:31,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 01:57:31,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-15 01:57:31,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:31,777 INFO L225 Difference]: With dead ends: 575 [2020-10-15 01:57:31,777 INFO L226 Difference]: Without dead ends: 271 [2020-10-15 01:57:31,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-15 01:57:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2020-10-15 01:57:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-15 01:57:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 442 transitions. [2020-10-15 01:57:31,791 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 442 transitions. Word has length 28 [2020-10-15 01:57:31,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:31,791 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 442 transitions. [2020-10-15 01:57:31,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 01:57:31,791 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 442 transitions. [2020-10-15 01:57:31,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 01:57:31,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:31,793 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:31,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 01:57:31,793 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:31,794 INFO L82 PathProgramCache]: Analyzing trace with hash -944739986, now seen corresponding path program 1 times [2020-10-15 01:57:31,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:31,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518705809] [2020-10-15 01:57:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:31,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:31,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:32,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:32,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 01:57:32,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 01:57:32,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-15 01:57:32,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:32,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:32,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 01:57:32,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:32,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 01:57:32,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:32,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:32,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:32,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:32,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:32,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:32,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:57:32,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:32,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:32,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:32,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:32,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:32,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:57:32,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518705809] [2020-10-15 01:57:32,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:32,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 01:57:32,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112079542] [2020-10-15 01:57:32,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 01:57:32,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:32,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 01:57:32,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:32,080 INFO L87 Difference]: Start difference. First operand 269 states and 442 transitions. Second operand 5 states. [2020-10-15 01:57:32,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:32,676 INFO L93 Difference]: Finished difference Result 511 states and 847 transitions. [2020-10-15 01:57:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 01:57:32,677 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-15 01:57:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:32,681 INFO L225 Difference]: With dead ends: 511 [2020-10-15 01:57:32,681 INFO L226 Difference]: Without dead ends: 499 [2020-10-15 01:57:32,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-15 01:57:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-15 01:57:32,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 477. [2020-10-15 01:57:32,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-15 01:57:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 785 transitions. [2020-10-15 01:57:32,702 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 785 transitions. Word has length 30 [2020-10-15 01:57:32,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:32,703 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 785 transitions. [2020-10-15 01:57:32,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 01:57:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 785 transitions. [2020-10-15 01:57:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 01:57:32,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:32,710 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:32,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 01:57:32,710 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:32,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:32,711 INFO L82 PathProgramCache]: Analyzing trace with hash 789275061, now seen corresponding path program 1 times [2020-10-15 01:57:32,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:32,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968965868] [2020-10-15 01:57:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:32,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:32,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:33,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:33,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 01:57:33,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 01:57:33,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-10-15 01:57:33,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:33,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:33,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 01:57:33,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:33,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-15 01:57:33,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:33,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:33,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:33,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:33,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:33,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:33,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:57:33,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:33,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:33,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:33,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:33,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:33,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:57:33,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968965868] [2020-10-15 01:57:33,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:33,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 01:57:33,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362746000] [2020-10-15 01:57:33,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 01:57:33,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:33,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 01:57:33,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:33,180 INFO L87 Difference]: Start difference. First operand 477 states and 785 transitions. Second operand 5 states. [2020-10-15 01:57:33,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:33,766 INFO L93 Difference]: Finished difference Result 540 states and 879 transitions. [2020-10-15 01:57:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 01:57:33,767 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-15 01:57:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:33,771 INFO L225 Difference]: With dead ends: 540 [2020-10-15 01:57:33,771 INFO L226 Difference]: Without dead ends: 535 [2020-10-15 01:57:33,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-15 01:57:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-10-15 01:57:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 523. [2020-10-15 01:57:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2020-10-15 01:57:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 857 transitions. [2020-10-15 01:57:33,791 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 857 transitions. Word has length 31 [2020-10-15 01:57:33,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:33,793 INFO L479 AbstractCegarLoop]: Abstraction has 523 states and 857 transitions. [2020-10-15 01:57:33,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 01:57:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 857 transitions. [2020-10-15 01:57:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 01:57:33,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:33,795 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:33,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 01:57:33,795 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:33,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2038890699, now seen corresponding path program 1 times [2020-10-15 01:57:33,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:33,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561166138] [2020-10-15 01:57:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:33,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:33,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:33,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:33,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 01:57:33,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 01:57:33,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-15 01:57:33,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:33,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:33,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 01:57:33,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-15 01:57:33,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 01:57:33,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:33,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:33,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:33,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:33,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:33,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:33,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 01:57:33,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:33,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:33,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:33,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:33,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:33,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 01:57:33,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561166138] [2020-10-15 01:57:33,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 01:57:33,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 01:57:33,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212744778] [2020-10-15 01:57:33,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 01:57:33,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:33,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 01:57:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 01:57:33,981 INFO L87 Difference]: Start difference. First operand 523 states and 857 transitions. Second operand 4 states. [2020-10-15 01:57:34,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:34,240 INFO L93 Difference]: Finished difference Result 1050 states and 1707 transitions. [2020-10-15 01:57:34,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 01:57:34,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-15 01:57:34,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:34,244 INFO L225 Difference]: With dead ends: 1050 [2020-10-15 01:57:34,245 INFO L226 Difference]: Without dead ends: 534 [2020-10-15 01:57:34,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:34,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-10-15 01:57:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2020-10-15 01:57:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2020-10-15 01:57:34,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 849 transitions. [2020-10-15 01:57:34,270 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 849 transitions. Word has length 32 [2020-10-15 01:57:34,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:34,272 INFO L479 AbstractCegarLoop]: Abstraction has 532 states and 849 transitions. [2020-10-15 01:57:34,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 01:57:34,273 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 849 transitions. [2020-10-15 01:57:34,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 01:57:34,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:34,274 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:34,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 01:57:34,275 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:34,275 INFO L82 PathProgramCache]: Analyzing trace with hash 820851006, now seen corresponding path program 1 times [2020-10-15 01:57:34,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:34,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669961996] [2020-10-15 01:57:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:34,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:34,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:34,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:34,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:34,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 01:57:34,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 01:57:34,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 515 [2020-10-15 01:57:34,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:34,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:34,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 01:57:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 01:57:34,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:34,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:34,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:34,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:34,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:34,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:34,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:57:34,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:34,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:34,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:34,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:34,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:34,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 01:57:34,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669961996] [2020-10-15 01:57:34,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:34,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 01:57:34,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446035084] [2020-10-15 01:57:34,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 01:57:34,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:34,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 01:57:34,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:34,895 INFO L87 Difference]: Start difference. First operand 532 states and 849 transitions. Second operand 5 states. [2020-10-15 01:57:35,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:35,543 INFO L93 Difference]: Finished difference Result 717 states and 1132 transitions. [2020-10-15 01:57:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 01:57:35,544 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-10-15 01:57:35,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:35,548 INFO L225 Difference]: With dead ends: 717 [2020-10-15 01:57:35,549 INFO L226 Difference]: Without dead ends: 704 [2020-10-15 01:57:35,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-15 01:57:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2020-10-15 01:57:35,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 680. [2020-10-15 01:57:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-10-15 01:57:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1076 transitions. [2020-10-15 01:57:35,574 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1076 transitions. Word has length 40 [2020-10-15 01:57:35,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:35,575 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 1076 transitions. [2020-10-15 01:57:35,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 01:57:35,575 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1076 transitions. [2020-10-15 01:57:35,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-15 01:57:35,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:35,576 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:35,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 01:57:35,576 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:35,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:35,577 INFO L82 PathProgramCache]: Analyzing trace with hash -311979035, now seen corresponding path program 1 times [2020-10-15 01:57:35,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:35,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824248637] [2020-10-15 01:57:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:35,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:35,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:35,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 01:57:35,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:35,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-15 01:57:35,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:35,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 01:57:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-15 01:57:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 01:57:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:35,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:35,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:35,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:35,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:35,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:35,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:57:35,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:35,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:35,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:35,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:35,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:35,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-15 01:57:35,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824248637] [2020-10-15 01:57:35,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 01:57:35,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 01:57:35,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105467874] [2020-10-15 01:57:35,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 01:57:35,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:35,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 01:57:35,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 01:57:35,738 INFO L87 Difference]: Start difference. First operand 680 states and 1076 transitions. Second operand 4 states. [2020-10-15 01:57:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:35,925 INFO L93 Difference]: Finished difference Result 1262 states and 2005 transitions. [2020-10-15 01:57:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 01:57:35,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-15 01:57:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:35,930 INFO L225 Difference]: With dead ends: 1262 [2020-10-15 01:57:35,930 INFO L226 Difference]: Without dead ends: 589 [2020-10-15 01:57:35,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-10-15 01:57:35,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 587. [2020-10-15 01:57:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-10-15 01:57:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 928 transitions. [2020-10-15 01:57:35,952 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 928 transitions. Word has length 41 [2020-10-15 01:57:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:35,953 INFO L479 AbstractCegarLoop]: Abstraction has 587 states and 928 transitions. [2020-10-15 01:57:35,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 01:57:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 928 transitions. [2020-10-15 01:57:35,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 01:57:35,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:35,954 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:35,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 01:57:35,954 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2035215205, now seen corresponding path program 1 times [2020-10-15 01:57:35,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:35,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176858564] [2020-10-15 01:57:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:35,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:36,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:36,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:36,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 01:57:36,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 01:57:36,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-15 01:57:36,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:36,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:36,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 01:57:36,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:36,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 01:57:36,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:36,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:36,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:36,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:36,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:36,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:36,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 01:57:36,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:36,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:36,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:36,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:36,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:36,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 01:57:36,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176858564] [2020-10-15 01:57:36,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:36,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 01:57:36,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492707939] [2020-10-15 01:57:36,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 01:57:36,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:36,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 01:57:36,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:36,379 INFO L87 Difference]: Start difference. First operand 587 states and 928 transitions. Second operand 5 states. [2020-10-15 01:57:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:36,970 INFO L93 Difference]: Finished difference Result 611 states and 953 transitions. [2020-10-15 01:57:36,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 01:57:36,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-10-15 01:57:36,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:36,975 INFO L225 Difference]: With dead ends: 611 [2020-10-15 01:57:36,975 INFO L226 Difference]: Without dead ends: 599 [2020-10-15 01:57:36,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-15 01:57:36,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2020-10-15 01:57:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 587. [2020-10-15 01:57:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-10-15 01:57:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 902 transitions. [2020-10-15 01:57:37,000 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 902 transitions. Word has length 42 [2020-10-15 01:57:37,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:37,000 INFO L479 AbstractCegarLoop]: Abstraction has 587 states and 902 transitions. [2020-10-15 01:57:37,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 01:57:37,001 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 902 transitions. [2020-10-15 01:57:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 01:57:37,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:37,002 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:37,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 01:57:37,002 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:37,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:37,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1265387988, now seen corresponding path program 1 times [2020-10-15 01:57:37,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:37,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859488581] [2020-10-15 01:57:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:37,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:37,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:37,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-15 01:57:37,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:37,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-15 01:57:37,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:37,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:37,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 01:57:37,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:37,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 01:57:37,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:37,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:37,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:37,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:37,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:37,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:37,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 01:57:37,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:37,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:37,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:37,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:37,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:37,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:57:37,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859488581] [2020-10-15 01:57:37,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:37,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 01:57:37,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945985145] [2020-10-15 01:57:37,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 01:57:37,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:37,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 01:57:37,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 01:57:37,442 INFO L87 Difference]: Start difference. First operand 587 states and 902 transitions. Second operand 6 states. [2020-10-15 01:57:38,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:38,269 INFO L93 Difference]: Finished difference Result 609 states and 925 transitions. [2020-10-15 01:57:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 01:57:38,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-15 01:57:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:38,275 INFO L225 Difference]: With dead ends: 609 [2020-10-15 01:57:38,275 INFO L226 Difference]: Without dead ends: 607 [2020-10-15 01:57:38,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 01:57:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2020-10-15 01:57:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 588. [2020-10-15 01:57:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2020-10-15 01:57:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 903 transitions. [2020-10-15 01:57:38,301 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 903 transitions. Word has length 44 [2020-10-15 01:57:38,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:38,302 INFO L479 AbstractCegarLoop]: Abstraction has 588 states and 903 transitions. [2020-10-15 01:57:38,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 01:57:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 903 transitions. [2020-10-15 01:57:38,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-15 01:57:38,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:38,303 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:38,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 01:57:38,303 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:38,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:38,303 INFO L82 PathProgramCache]: Analyzing trace with hash -447084202, now seen corresponding path program 1 times [2020-10-15 01:57:38,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:38,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606434222] [2020-10-15 01:57:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:38,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:38,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:38,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:38,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-15 01:57:38,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 01:57:38,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-15 01:57:38,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:38,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:38,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 01:57:38,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-15 01:57:38,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 01:57:38,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:38,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:38,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:38,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:38,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:38,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:38,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:57:38,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:38,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:38,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:38,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:38,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:38,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-15 01:57:38,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606434222] [2020-10-15 01:57:38,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 01:57:38,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 01:57:38,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853398447] [2020-10-15 01:57:38,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 01:57:38,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:38,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 01:57:38,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 01:57:38,672 INFO L87 Difference]: Start difference. First operand 588 states and 903 transitions. Second operand 4 states. [2020-10-15 01:57:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:38,814 INFO L93 Difference]: Finished difference Result 1191 states and 1815 transitions. [2020-10-15 01:57:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 01:57:38,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-15 01:57:38,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:38,820 INFO L225 Difference]: With dead ends: 1191 [2020-10-15 01:57:38,820 INFO L226 Difference]: Without dead ends: 610 [2020-10-15 01:57:38,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-10-15 01:57:38,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 608. [2020-10-15 01:57:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2020-10-15 01:57:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 911 transitions. [2020-10-15 01:57:38,846 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 911 transitions. Word has length 45 [2020-10-15 01:57:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:38,846 INFO L479 AbstractCegarLoop]: Abstraction has 608 states and 911 transitions. [2020-10-15 01:57:38,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 01:57:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 911 transitions. [2020-10-15 01:57:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 01:57:38,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:38,847 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:38,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 01:57:38,848 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:38,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:38,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1882634818, now seen corresponding path program 1 times [2020-10-15 01:57:38,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:38,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126247557] [2020-10-15 01:57:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:38,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:38,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:38,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:39,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:40,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:41,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:41,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 01:57:41,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 01:57:41,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2338 [2020-10-15 01:57:41,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:41,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:41,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 01:57:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 01:57:41,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:41,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:41,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:41,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:41,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:41,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:41,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:57:41,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:41,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:41,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:41,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:41,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:41,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 01:57:41,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126247557] [2020-10-15 01:57:41,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:41,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 01:57:41,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615946161] [2020-10-15 01:57:41,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 01:57:41,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:41,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 01:57:41,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 01:57:41,281 INFO L87 Difference]: Start difference. First operand 608 states and 911 transitions. Second operand 6 states. [2020-10-15 01:57:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:42,275 INFO L93 Difference]: Finished difference Result 1454 states and 2166 transitions. [2020-10-15 01:57:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 01:57:42,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-15 01:57:42,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:42,283 INFO L225 Difference]: With dead ends: 1454 [2020-10-15 01:57:42,283 INFO L226 Difference]: Without dead ends: 853 [2020-10-15 01:57:42,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 01:57:42,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2020-10-15 01:57:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 778. [2020-10-15 01:57:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-10-15 01:57:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1175 transitions. [2020-10-15 01:57:42,340 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1175 transitions. Word has length 55 [2020-10-15 01:57:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:42,341 INFO L479 AbstractCegarLoop]: Abstraction has 778 states and 1175 transitions. [2020-10-15 01:57:42,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 01:57:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1175 transitions. [2020-10-15 01:57:42,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-15 01:57:42,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:42,342 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:42,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 01:57:42,343 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:42,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1711267900, now seen corresponding path program 1 times [2020-10-15 01:57:42,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:42,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373179426] [2020-10-15 01:57:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:42,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:42,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:42,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:43,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:43,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-15 01:57:43,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 01:57:43,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 776 [2020-10-15 01:57:43,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:43,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:43,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 01:57:43,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-15 01:57:43,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-15 01:57:43,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:43,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:43,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:43,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:43,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:43,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:43,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:57:43,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:43,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:43,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:43,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-15 01:57:43,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373179426] [2020-10-15 01:57:43,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:43,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 01:57:43,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138906385] [2020-10-15 01:57:43,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 01:57:43,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:43,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 01:57:43,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 01:57:43,400 INFO L87 Difference]: Start difference. First operand 778 states and 1175 transitions. Second operand 6 states. [2020-10-15 01:57:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:44,443 INFO L93 Difference]: Finished difference Result 1689 states and 2541 transitions. [2020-10-15 01:57:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 01:57:44,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-15 01:57:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:44,449 INFO L225 Difference]: With dead ends: 1689 [2020-10-15 01:57:44,449 INFO L226 Difference]: Without dead ends: 899 [2020-10-15 01:57:44,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-15 01:57:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2020-10-15 01:57:44,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 868. [2020-10-15 01:57:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2020-10-15 01:57:44,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1279 transitions. [2020-10-15 01:57:44,493 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1279 transitions. Word has length 55 [2020-10-15 01:57:44,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:44,494 INFO L479 AbstractCegarLoop]: Abstraction has 868 states and 1279 transitions. [2020-10-15 01:57:44,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 01:57:44,494 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1279 transitions. [2020-10-15 01:57:44,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-15 01:57:44,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:44,495 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:44,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 01:57:44,495 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:44,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:44,496 INFO L82 PathProgramCache]: Analyzing trace with hash 810326805, now seen corresponding path program 1 times [2020-10-15 01:57:44,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:44,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969374783] [2020-10-15 01:57:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:44,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:44,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:44,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-15 01:57:44,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:44,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-15 01:57:44,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:44,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:44,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 01:57:44,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-15 01:57:44,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 01:57:44,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:44,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:44,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:44,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:44,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:44,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:44,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:57:44,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:44,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:44,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:44,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:44,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:44,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-15 01:57:44,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969374783] [2020-10-15 01:57:44,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 01:57:44,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 01:57:44,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3799119] [2020-10-15 01:57:44,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 01:57:44,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:44,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 01:57:44,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 01:57:44,671 INFO L87 Difference]: Start difference. First operand 868 states and 1279 transitions. Second operand 4 states. [2020-10-15 01:57:44,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:44,900 INFO L93 Difference]: Finished difference Result 1250 states and 1829 transitions. [2020-10-15 01:57:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 01:57:44,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-15 01:57:44,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:44,903 INFO L225 Difference]: With dead ends: 1250 [2020-10-15 01:57:44,903 INFO L226 Difference]: Without dead ends: 389 [2020-10-15 01:57:44,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 01:57:44,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-15 01:57:44,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 387. [2020-10-15 01:57:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-15 01:57:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 552 transitions. [2020-10-15 01:57:44,924 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 552 transitions. Word has length 57 [2020-10-15 01:57:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:44,924 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 552 transitions. [2020-10-15 01:57:44,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 01:57:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 552 transitions. [2020-10-15 01:57:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-15 01:57:44,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:44,925 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:44,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 01:57:44,926 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:44,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:44,926 INFO L82 PathProgramCache]: Analyzing trace with hash 933833257, now seen corresponding path program 1 times [2020-10-15 01:57:44,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:44,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076274313] [2020-10-15 01:57:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:44,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:45,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:45,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-15 01:57:45,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:45,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-15 01:57:45,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:45,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 01:57:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:45,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 01:57:45,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:45,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:45,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:45,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:45,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:45,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:45,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:57:45,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:45,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:45,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:45,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:45,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:45,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-15 01:57:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 01:57:45,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076274313] [2020-10-15 01:57:45,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 01:57:45,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 01:57:45,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340465198] [2020-10-15 01:57:45,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 01:57:45,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:45,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 01:57:45,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 01:57:45,402 INFO L87 Difference]: Start difference. First operand 387 states and 552 transitions. Second operand 6 states. [2020-10-15 01:57:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:45,881 INFO L93 Difference]: Finished difference Result 539 states and 766 transitions. [2020-10-15 01:57:45,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 01:57:45,882 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-15 01:57:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:45,885 INFO L225 Difference]: With dead ends: 539 [2020-10-15 01:57:45,885 INFO L226 Difference]: Without dead ends: 535 [2020-10-15 01:57:45,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 01:57:45,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-10-15 01:57:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 515. [2020-10-15 01:57:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-10-15 01:57:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 738 transitions. [2020-10-15 01:57:45,911 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 738 transitions. Word has length 59 [2020-10-15 01:57:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:45,911 INFO L479 AbstractCegarLoop]: Abstraction has 515 states and 738 transitions. [2020-10-15 01:57:45,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 01:57:45,912 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 738 transitions. [2020-10-15 01:57:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 01:57:45,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:45,913 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:45,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 01:57:45,913 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:45,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:45,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1104488738, now seen corresponding path program 1 times [2020-10-15 01:57:45,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:45,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947552888] [2020-10-15 01:57:45,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:45,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:46,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:46,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 01:57:46,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:46,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-15 01:57:46,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:46,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:46,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 01:57:46,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:46,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-15 01:57:46,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:46,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:46,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:46,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:46,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:46,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:46,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:57:46,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:46,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:46,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:46,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:57:46,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947552888] [2020-10-15 01:57:46,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:46,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 01:57:46,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478326238] [2020-10-15 01:57:46,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 01:57:46,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:46,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 01:57:46,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 01:57:46,312 INFO L87 Difference]: Start difference. First operand 515 states and 738 transitions. Second operand 7 states. [2020-10-15 01:57:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:47,090 INFO L93 Difference]: Finished difference Result 523 states and 746 transitions. [2020-10-15 01:57:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 01:57:47,091 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-10-15 01:57:47,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:47,094 INFO L225 Difference]: With dead ends: 523 [2020-10-15 01:57:47,094 INFO L226 Difference]: Without dead ends: 521 [2020-10-15 01:57:47,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-15 01:57:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2020-10-15 01:57:47,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 515. [2020-10-15 01:57:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-10-15 01:57:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 737 transitions. [2020-10-15 01:57:47,113 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 737 transitions. Word has length 60 [2020-10-15 01:57:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:47,113 INFO L479 AbstractCegarLoop]: Abstraction has 515 states and 737 transitions. [2020-10-15 01:57:47,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 01:57:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 737 transitions. [2020-10-15 01:57:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-15 01:57:47,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:47,120 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:47,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 01:57:47,121 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:47,121 INFO L82 PathProgramCache]: Analyzing trace with hash 855434068, now seen corresponding path program 1 times [2020-10-15 01:57:47,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:47,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762526725] [2020-10-15 01:57:47,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:47,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:47,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:47,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:47,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-15 01:57:47,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 01:57:47,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 496 [2020-10-15 01:57:47,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:47,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:47,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 01:57:47,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-15 01:57:47,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-15 01:57:47,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:47,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:47,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:47,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:47,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:47,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:47,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 01:57:47,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:47,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:47,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:47,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:47,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:47,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 01:57:47,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762526725] [2020-10-15 01:57:47,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:47,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 01:57:47,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580088756] [2020-10-15 01:57:47,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 01:57:47,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:47,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 01:57:47,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 01:57:47,857 INFO L87 Difference]: Start difference. First operand 515 states and 737 transitions. Second operand 8 states. [2020-10-15 01:57:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:49,279 INFO L93 Difference]: Finished difference Result 552 states and 768 transitions. [2020-10-15 01:57:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 01:57:49,280 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-15 01:57:49,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:49,283 INFO L225 Difference]: With dead ends: 552 [2020-10-15 01:57:49,283 INFO L226 Difference]: Without dead ends: 550 [2020-10-15 01:57:49,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-15 01:57:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2020-10-15 01:57:49,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 515. [2020-10-15 01:57:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-10-15 01:57:49,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 731 transitions. [2020-10-15 01:57:49,314 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 731 transitions. Word has length 67 [2020-10-15 01:57:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:49,315 INFO L479 AbstractCegarLoop]: Abstraction has 515 states and 731 transitions. [2020-10-15 01:57:49,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 01:57:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 731 transitions. [2020-10-15 01:57:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-15 01:57:49,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:49,316 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:49,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 01:57:49,317 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:49,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:49,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1201928326, now seen corresponding path program 1 times [2020-10-15 01:57:49,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:49,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662965382] [2020-10-15 01:57:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:49,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:49,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:49,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-15 01:57:49,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:49,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-15 01:57:49,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:49,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:49,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 01:57:49,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:49,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-15 01:57:49,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:49,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:49,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:49,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:49,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:49,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:49,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:57:49,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:49,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:49,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-15 01:57:49,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662965382] [2020-10-15 01:57:49,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:49,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 01:57:49,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380023181] [2020-10-15 01:57:49,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 01:57:49,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:49,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 01:57:49,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-15 01:57:49,935 INFO L87 Difference]: Start difference. First operand 515 states and 731 transitions. Second operand 7 states. [2020-10-15 01:57:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:50,761 INFO L93 Difference]: Finished difference Result 1133 states and 1600 transitions. [2020-10-15 01:57:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 01:57:50,769 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-10-15 01:57:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:50,772 INFO L225 Difference]: With dead ends: 1133 [2020-10-15 01:57:50,772 INFO L226 Difference]: Without dead ends: 625 [2020-10-15 01:57:50,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-15 01:57:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2020-10-15 01:57:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 597. [2020-10-15 01:57:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 597 states. [2020-10-15 01:57:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 844 transitions. [2020-10-15 01:57:50,797 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 844 transitions. Word has length 77 [2020-10-15 01:57:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:50,798 INFO L479 AbstractCegarLoop]: Abstraction has 597 states and 844 transitions. [2020-10-15 01:57:50,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 01:57:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 844 transitions. [2020-10-15 01:57:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-15 01:57:50,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:50,799 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:50,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 01:57:50,799 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:50,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1100197245, now seen corresponding path program 1 times [2020-10-15 01:57:50,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:50,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103312701] [2020-10-15 01:57:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:50,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:51,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:51,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-15 01:57:51,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:51,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-15 01:57:51,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:51,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 01:57:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-15 01:57:51,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:51,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:51,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:51,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:51,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:51,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:51,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 01:57:51,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:51,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:51,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:51,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:51,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:51,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:57:52,006 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:57:52,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103312701] [2020-10-15 01:57:52,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:52,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 01:57:52,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321317798] [2020-10-15 01:57:52,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 01:57:52,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:52,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 01:57:52,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-15 01:57:52,008 INFO L87 Difference]: Start difference. First operand 597 states and 844 transitions. Second operand 10 states. [2020-10-15 01:57:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:53,604 INFO L93 Difference]: Finished difference Result 612 states and 861 transitions. [2020-10-15 01:57:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 01:57:53,608 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 90 [2020-10-15 01:57:53,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:53,611 INFO L225 Difference]: With dead ends: 612 [2020-10-15 01:57:53,612 INFO L226 Difference]: Without dead ends: 610 [2020-10-15 01:57:53,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-15 01:57:53,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-10-15 01:57:53,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 598. [2020-10-15 01:57:53,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2020-10-15 01:57:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 845 transitions. [2020-10-15 01:57:53,634 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 845 transitions. Word has length 90 [2020-10-15 01:57:53,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:53,634 INFO L479 AbstractCegarLoop]: Abstraction has 598 states and 845 transitions. [2020-10-15 01:57:53,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 01:57:53,635 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 845 transitions. [2020-10-15 01:57:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-15 01:57:53,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:53,636 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:53,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 01:57:53,636 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:53,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1790135754, now seen corresponding path program 1 times [2020-10-15 01:57:53,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:53,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801139269] [2020-10-15 01:57:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:53,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:53,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:54,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:54,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:54,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:56,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:56,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-15 01:57:56,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 01:57:56,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3191 [2020-10-15 01:57:56,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:56,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:56,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 01:57:56,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:56,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-15 01:57:56,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:56,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:56,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:56,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:56,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:56,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:56,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 01:57:56,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:56,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:56,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:56,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:56,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:56,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 57 proven. 118 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-15 01:57:56,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801139269] [2020-10-15 01:57:56,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:56,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 01:57:56,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765384653] [2020-10-15 01:57:56,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 01:57:56,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:56,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 01:57:56,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-15 01:57:56,972 INFO L87 Difference]: Start difference. First operand 598 states and 845 transitions. Second operand 8 states. [2020-10-15 01:57:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:57:58,301 INFO L93 Difference]: Finished difference Result 1313 states and 1848 transitions. [2020-10-15 01:57:58,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 01:57:58,302 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 105 [2020-10-15 01:57:58,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:57:58,307 INFO L225 Difference]: With dead ends: 1313 [2020-10-15 01:57:58,308 INFO L226 Difference]: Without dead ends: 722 [2020-10-15 01:57:58,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-15 01:57:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2020-10-15 01:57:58,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 685. [2020-10-15 01:57:58,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2020-10-15 01:57:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 970 transitions. [2020-10-15 01:57:58,348 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 970 transitions. Word has length 105 [2020-10-15 01:57:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:57:58,349 INFO L479 AbstractCegarLoop]: Abstraction has 685 states and 970 transitions. [2020-10-15 01:57:58,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 01:57:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 970 transitions. [2020-10-15 01:57:58,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-15 01:57:58,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:57:58,352 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:57:58,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 01:57:58,352 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:57:58,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:57:58,353 INFO L82 PathProgramCache]: Analyzing trace with hash -669250513, now seen corresponding path program 1 times [2020-10-15 01:57:58,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:57:58,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144634799] [2020-10-15 01:57:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:57:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:58,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:59,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:59,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-15 01:57:59,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:59,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-15 01:57:59,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:59,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:59,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 01:57:59,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:57:59,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-15 01:57:59,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:59,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:57:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:57:59,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:57:59,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:57:59,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:57:59,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:57:59,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 01:57:59,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:57:59,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:57:59,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:57:59,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:57:59,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:57:59,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:57:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 24 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:57:59,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144634799] [2020-10-15 01:57:59,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:57:59,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 01:57:59,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030991716] [2020-10-15 01:57:59,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 01:57:59,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:57:59,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 01:57:59,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-15 01:57:59,697 INFO L87 Difference]: Start difference. First operand 685 states and 970 transitions. Second operand 11 states. [2020-10-15 01:58:01,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:58:01,540 INFO L93 Difference]: Finished difference Result 699 states and 985 transitions. [2020-10-15 01:58:01,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 01:58:01,543 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 106 [2020-10-15 01:58:01,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:58:01,546 INFO L225 Difference]: With dead ends: 699 [2020-10-15 01:58:01,546 INFO L226 Difference]: Without dead ends: 697 [2020-10-15 01:58:01,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-15 01:58:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-10-15 01:58:01,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 685. [2020-10-15 01:58:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2020-10-15 01:58:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 969 transitions. [2020-10-15 01:58:01,576 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 969 transitions. Word has length 106 [2020-10-15 01:58:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:58:01,577 INFO L479 AbstractCegarLoop]: Abstraction has 685 states and 969 transitions. [2020-10-15 01:58:01,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 01:58:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 969 transitions. [2020-10-15 01:58:01,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-15 01:58:01,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:01,579 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:01,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 01:58:01,579 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:01,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1815351467, now seen corresponding path program 2 times [2020-10-15 01:58:01,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:01,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012727208] [2020-10-15 01:58:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:01,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:02,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:02,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-15 01:58:02,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:02,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-15 01:58:02,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:02,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:02,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 01:58:02,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:58:02,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-15 01:58:02,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:02,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:58:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:02,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:02,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:02,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:58:02,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:02,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 01:58:02,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:02,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:02,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:58:02,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:02,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:58:02,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 68 proven. 206 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-15 01:58:02,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012727208] [2020-10-15 01:58:02,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:58:02,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 01:58:02,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150962600] [2020-10-15 01:58:02,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 01:58:02,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:58:02,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 01:58:02,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 01:58:02,734 INFO L87 Difference]: Start difference. First operand 685 states and 969 transitions. Second operand 9 states. [2020-10-15 01:58:03,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:58:03,918 INFO L93 Difference]: Finished difference Result 1485 states and 2087 transitions. [2020-10-15 01:58:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 01:58:03,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2020-10-15 01:58:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:58:03,926 INFO L225 Difference]: With dead ends: 1485 [2020-10-15 01:58:03,926 INFO L226 Difference]: Without dead ends: 807 [2020-10-15 01:58:03,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-15 01:58:03,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2020-10-15 01:58:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 767. [2020-10-15 01:58:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2020-10-15 01:58:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1082 transitions. [2020-10-15 01:58:03,953 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1082 transitions. Word has length 123 [2020-10-15 01:58:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:58:03,954 INFO L479 AbstractCegarLoop]: Abstraction has 767 states and 1082 transitions. [2020-10-15 01:58:03,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 01:58:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1082 transitions. [2020-10-15 01:58:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-15 01:58:03,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:03,956 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:03,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 01:58:03,956 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:03,956 INFO L82 PathProgramCache]: Analyzing trace with hash -287211762, now seen corresponding path program 2 times [2020-10-15 01:58:03,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:03,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752046158] [2020-10-15 01:58:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:04,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:05,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:05,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-15 01:58:05,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:05,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1359 [2020-10-15 01:58:05,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:05,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:05,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 01:58:05,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:58:05,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-15 01:58:05,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:05,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:58:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:05,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:05,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:05,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:58:05,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:05,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 01:58:05,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:05,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:05,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:58:05,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:05,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:58:05,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:58:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 33 proven. 334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:58:05,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752046158] [2020-10-15 01:58:05,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:58:05,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 01:58:05,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261711551] [2020-10-15 01:58:05,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 01:58:05,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:58:05,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 01:58:05,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-15 01:58:05,861 INFO L87 Difference]: Start difference. First operand 767 states and 1082 transitions. Second operand 14 states. [2020-10-15 01:58:09,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:58:09,252 INFO L93 Difference]: Finished difference Result 788 states and 1106 transitions. [2020-10-15 01:58:09,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 01:58:09,253 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 136 [2020-10-15 01:58:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:58:09,257 INFO L225 Difference]: With dead ends: 788 [2020-10-15 01:58:09,257 INFO L226 Difference]: Without dead ends: 786 [2020-10-15 01:58:09,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-15 01:58:09,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2020-10-15 01:58:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 768. [2020-10-15 01:58:09,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2020-10-15 01:58:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1083 transitions. [2020-10-15 01:58:09,281 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1083 transitions. Word has length 136 [2020-10-15 01:58:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:58:09,282 INFO L479 AbstractCegarLoop]: Abstraction has 768 states and 1083 transitions. [2020-10-15 01:58:09,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 01:58:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1083 transitions. [2020-10-15 01:58:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-15 01:58:09,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:09,284 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:09,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 01:58:09,284 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:09,285 INFO L82 PathProgramCache]: Analyzing trace with hash -568234875, now seen corresponding path program 2 times [2020-10-15 01:58:09,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:09,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314005516] [2020-10-15 01:58:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:09,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:09,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:10,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:10,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:11,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:11,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:11,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:14,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:14,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-15 01:58:14,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 01:58:14,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-15 01:58:14,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:14,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:14,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 01:58:14,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:58:14,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-15 01:58:14,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:14,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:58:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:14,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:14,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:14,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:58:14,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:14,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:58:14,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:14,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:14,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:58:14,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:14,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:58:14,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:58:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 91 proven. 330 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-15 01:58:14,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314005516] [2020-10-15 01:58:14,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:58:14,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 01:58:14,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596221385] [2020-10-15 01:58:14,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 01:58:14,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:58:14,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 01:58:14,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-15 01:58:14,517 INFO L87 Difference]: Start difference. First operand 768 states and 1083 transitions. Second operand 10 states. [2020-10-15 01:58:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:58:15,856 INFO L93 Difference]: Finished difference Result 1665 states and 2335 transitions. [2020-10-15 01:58:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 01:58:15,857 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 151 [2020-10-15 01:58:15,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:58:15,861 INFO L225 Difference]: With dead ends: 1665 [2020-10-15 01:58:15,861 INFO L226 Difference]: Without dead ends: 904 [2020-10-15 01:58:15,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-15 01:58:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-10-15 01:58:15,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 855. [2020-10-15 01:58:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-10-15 01:58:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1208 transitions. [2020-10-15 01:58:15,891 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1208 transitions. Word has length 151 [2020-10-15 01:58:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:58:15,892 INFO L479 AbstractCegarLoop]: Abstraction has 855 states and 1208 transitions. [2020-10-15 01:58:15,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 01:58:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1208 transitions. [2020-10-15 01:58:15,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-15 01:58:15,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:15,894 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:15,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 01:58:15,894 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:15,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:15,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1445028928, now seen corresponding path program 2 times [2020-10-15 01:58:15,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:15,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251858235] [2020-10-15 01:58:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:16,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:17,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:17,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-15 01:58:17,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:17,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1454 [2020-10-15 01:58:17,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:17,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:17,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 01:58:17,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:58:17,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-15 01:58:17,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:17,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:58:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:17,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:17,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:17,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:58:17,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:17,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 01:58:17,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:17,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:17,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:58:17,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:17,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:58:17,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:58:17,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251858235] [2020-10-15 01:58:17,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:58:17,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 01:58:17,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889642455] [2020-10-15 01:58:17,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 01:58:17,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:58:17,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 01:58:17,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-15 01:58:17,819 INFO L87 Difference]: Start difference. First operand 855 states and 1208 transitions. Second operand 15 states. [2020-10-15 01:58:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:58:21,435 INFO L93 Difference]: Finished difference Result 875 states and 1230 transitions. [2020-10-15 01:58:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 01:58:21,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 152 [2020-10-15 01:58:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:58:21,440 INFO L225 Difference]: With dead ends: 875 [2020-10-15 01:58:21,440 INFO L226 Difference]: Without dead ends: 873 [2020-10-15 01:58:21,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-10-15 01:58:21,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2020-10-15 01:58:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 855. [2020-10-15 01:58:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-10-15 01:58:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1207 transitions. [2020-10-15 01:58:21,466 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1207 transitions. Word has length 152 [2020-10-15 01:58:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:58:21,466 INFO L479 AbstractCegarLoop]: Abstraction has 855 states and 1207 transitions. [2020-10-15 01:58:21,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 01:58:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1207 transitions. [2020-10-15 01:58:21,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-15 01:58:21,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:21,468 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 10, 10, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:21,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 01:58:21,469 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:21,469 INFO L82 PathProgramCache]: Analyzing trace with hash 305812452, now seen corresponding path program 3 times [2020-10-15 01:58:21,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:21,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431883324] [2020-10-15 01:58:21,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:21,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:23,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:23,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-15 01:58:23,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:23,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2337 [2020-10-15 01:58:23,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:23,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 01:58:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:58:23,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-15 01:58:23,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:23,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:58:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:23,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:23,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:23,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:58:23,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:23,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 01:58:23,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:23,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:23,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:58:23,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:23,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:58:23,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 98 proven. 470 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-15 01:58:24,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431883324] [2020-10-15 01:58:24,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:58:24,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 01:58:24,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548767238] [2020-10-15 01:58:24,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 01:58:24,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:58:24,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 01:58:24,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-15 01:58:24,015 INFO L87 Difference]: Start difference. First operand 855 states and 1207 transitions. Second operand 11 states. [2020-10-15 01:58:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:58:25,551 INFO L93 Difference]: Finished difference Result 1837 states and 2574 transitions. [2020-10-15 01:58:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 01:58:25,552 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 169 [2020-10-15 01:58:25,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:58:25,557 INFO L225 Difference]: With dead ends: 1837 [2020-10-15 01:58:25,558 INFO L226 Difference]: Without dead ends: 989 [2020-10-15 01:58:25,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-15 01:58:25,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2020-10-15 01:58:25,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 937. [2020-10-15 01:58:25,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 937 states. [2020-10-15 01:58:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1320 transitions. [2020-10-15 01:58:25,592 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1320 transitions. Word has length 169 [2020-10-15 01:58:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:58:25,593 INFO L479 AbstractCegarLoop]: Abstraction has 937 states and 1320 transitions. [2020-10-15 01:58:25,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 01:58:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1320 transitions. [2020-10-15 01:58:25,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-15 01:58:25,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:25,595 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 11, 11, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:25,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 01:58:25,596 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:25,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:25,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1596376353, now seen corresponding path program 3 times [2020-10-15 01:58:25,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:25,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148123144] [2020-10-15 01:58:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:25,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:28,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:28,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-15 01:58:28,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:28,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2655 [2020-10-15 01:58:28,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:28,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:28,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 01:58:28,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:58:28,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-15 01:58:28,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:29,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:58:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:29,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:29,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:29,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:58:29,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:29,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:58:29,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:29,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:29,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:58:29,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:29,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:58:29,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 01:58:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 45 proven. 656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:58:29,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148123144] [2020-10-15 01:58:29,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:58:29,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 01:58:29,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081604400] [2020-10-15 01:58:29,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 01:58:29,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:58:29,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 01:58:29,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-15 01:58:29,274 INFO L87 Difference]: Start difference. First operand 937 states and 1320 transitions. Second operand 18 states. [2020-10-15 01:58:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:58:35,191 INFO L93 Difference]: Finished difference Result 964 states and 1351 transitions. [2020-10-15 01:58:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 01:58:35,192 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 182 [2020-10-15 01:58:35,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:58:35,195 INFO L225 Difference]: With dead ends: 964 [2020-10-15 01:58:35,196 INFO L226 Difference]: Without dead ends: 962 [2020-10-15 01:58:35,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 01:58:35,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2020-10-15 01:58:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 938. [2020-10-15 01:58:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-10-15 01:58:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1321 transitions. [2020-10-15 01:58:35,219 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1321 transitions. Word has length 182 [2020-10-15 01:58:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:58:35,219 INFO L479 AbstractCegarLoop]: Abstraction has 938 states and 1321 transitions. [2020-10-15 01:58:35,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 01:58:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1321 transitions. [2020-10-15 01:58:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-15 01:58:35,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:35,222 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 12, 12, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:35,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-15 01:58:35,222 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:35,223 INFO L82 PathProgramCache]: Analyzing trace with hash -730696556, now seen corresponding path program 3 times [2020-10-15 01:58:35,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:35,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091206887] [2020-10-15 01:58:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:35,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:35,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:36,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:36,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:37,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:38,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:38,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:39,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:40,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:40,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-15 01:58:40,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 01:58:40,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-15 01:58:40,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:40,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:40,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 01:58:40,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:58:40,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-15 01:58:40,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:40,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:58:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:40,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:40,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:40,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:58:40,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:40,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 01:58:40,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:40,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:40,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:58:40,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:40,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:58:40,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 125 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-15 01:58:40,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091206887] [2020-10-15 01:58:40,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:58:40,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 01:58:40,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368006353] [2020-10-15 01:58:40,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 01:58:40,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:58:40,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 01:58:40,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-15 01:58:40,530 INFO L87 Difference]: Start difference. First operand 938 states and 1321 transitions. Second operand 12 states. [2020-10-15 01:58:42,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:58:42,355 INFO L93 Difference]: Finished difference Result 2017 states and 2822 transitions. [2020-10-15 01:58:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 01:58:42,356 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 197 [2020-10-15 01:58:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:58:42,360 INFO L225 Difference]: With dead ends: 2017 [2020-10-15 01:58:42,360 INFO L226 Difference]: Without dead ends: 1086 [2020-10-15 01:58:42,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-15 01:58:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2020-10-15 01:58:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1025. [2020-10-15 01:58:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1025 states. [2020-10-15 01:58:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1446 transitions. [2020-10-15 01:58:42,392 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1446 transitions. Word has length 197 [2020-10-15 01:58:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:58:42,392 INFO L479 AbstractCegarLoop]: Abstraction has 1025 states and 1446 transitions. [2020-10-15 01:58:42,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 01:58:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1446 transitions. [2020-10-15 01:58:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-15 01:58:42,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:42,395 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 12, 12, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:42,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-15 01:58:42,396 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:42,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2108593553, now seen corresponding path program 3 times [2020-10-15 01:58:42,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:42,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586487432] [2020-10-15 01:58:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:42,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:45,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:45,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-15 01:58:45,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:45,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2937 [2020-10-15 01:58:45,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:45,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:45,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 01:58:45,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:58:45,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 185 [2020-10-15 01:58:45,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:45,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:58:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:45,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:45,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:45,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:58:45,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:45,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:58:45,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:45,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:45,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:58:45,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:45,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:58:45,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 48 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:58:46,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586487432] [2020-10-15 01:58:46,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:58:46,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 01:58:46,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213092670] [2020-10-15 01:58:46,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 01:58:46,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:58:46,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 01:58:46,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-15 01:58:46,022 INFO L87 Difference]: Start difference. First operand 1025 states and 1446 transitions. Second operand 19 states. [2020-10-15 01:58:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:58:52,388 INFO L93 Difference]: Finished difference Result 1051 states and 1475 transitions. [2020-10-15 01:58:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 01:58:52,388 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 198 [2020-10-15 01:58:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:58:52,392 INFO L225 Difference]: With dead ends: 1051 [2020-10-15 01:58:52,392 INFO L226 Difference]: Without dead ends: 1049 [2020-10-15 01:58:52,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 01:58:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2020-10-15 01:58:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1025. [2020-10-15 01:58:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1025 states. [2020-10-15 01:58:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1445 transitions. [2020-10-15 01:58:52,420 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1445 transitions. Word has length 198 [2020-10-15 01:58:52,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:58:52,421 INFO L479 AbstractCegarLoop]: Abstraction has 1025 states and 1445 transitions. [2020-10-15 01:58:52,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 01:58:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1445 transitions. [2020-10-15 01:58:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-15 01:58:52,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:52,424 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 13, 13, 8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:52,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-15 01:58:52,425 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:52,425 INFO L82 PathProgramCache]: Analyzing trace with hash -699066829, now seen corresponding path program 4 times [2020-10-15 01:58:52,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:52,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323735492] [2020-10-15 01:58:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:52,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:55,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:55,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-15 01:58:55,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:55,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3438 [2020-10-15 01:58:55,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:55,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:55,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 01:58:55,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:58:55,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-15 01:58:55,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:56,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:58:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:56,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:58:56,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:58:56,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:58:56,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:58:56,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:58:56,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:58:56,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:58:56,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:58:56,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:58:56,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:58:56,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:58:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 128 proven. 842 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-15 01:58:56,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323735492] [2020-10-15 01:58:56,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:58:56,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 01:58:56,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540321964] [2020-10-15 01:58:56,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 01:58:56,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:58:56,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 01:58:56,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-15 01:58:56,103 INFO L87 Difference]: Start difference. First operand 1025 states and 1445 transitions. Second operand 13 states. [2020-10-15 01:58:57,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:58:57,975 INFO L93 Difference]: Finished difference Result 2189 states and 3061 transitions. [2020-10-15 01:58:57,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 01:58:57,976 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 215 [2020-10-15 01:58:57,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:58:57,981 INFO L225 Difference]: With dead ends: 2189 [2020-10-15 01:58:57,981 INFO L226 Difference]: Without dead ends: 1171 [2020-10-15 01:58:57,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-15 01:58:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2020-10-15 01:58:58,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1107. [2020-10-15 01:58:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1107 states. [2020-10-15 01:58:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1558 transitions. [2020-10-15 01:58:58,009 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1558 transitions. Word has length 215 [2020-10-15 01:58:58,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:58:58,010 INFO L479 AbstractCegarLoop]: Abstraction has 1107 states and 1558 transitions. [2020-10-15 01:58:58,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 01:58:58,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1558 transitions. [2020-10-15 01:58:58,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-15 01:58:58,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:58:58,012 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 14, 14, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:58:58,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-15 01:58:58,012 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:58:58,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:58:58,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1657081616, now seen corresponding path program 4 times [2020-10-15 01:58:58,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:58:58,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700012760] [2020-10-15 01:58:58,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:58:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:58:58,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:03,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:59:03,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-15 01:59:03,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:59:03,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-15 01:59:03,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:59:03,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:59:03,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 01:59:03,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:59:03,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 215 [2020-10-15 01:59:03,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:59:03,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:59:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:59:03,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:03,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:59:03,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:59:03,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:59:03,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:59:03,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:59:03,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:59:03,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:59:03,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:59:03,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:59:03,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:59:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 57 proven. 1086 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:59:03,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700012760] [2020-10-15 01:59:03,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:59:03,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 01:59:03,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304290196] [2020-10-15 01:59:03,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 01:59:03,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:59:03,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 01:59:03,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-15 01:59:03,969 INFO L87 Difference]: Start difference. First operand 1107 states and 1558 transitions. Second operand 22 states. [2020-10-15 01:59:12,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:59:12,900 INFO L93 Difference]: Finished difference Result 1140 states and 1596 transitions. [2020-10-15 01:59:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 01:59:12,900 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 228 [2020-10-15 01:59:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:59:12,905 INFO L225 Difference]: With dead ends: 1140 [2020-10-15 01:59:12,905 INFO L226 Difference]: Without dead ends: 1138 [2020-10-15 01:59:12,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 01:59:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2020-10-15 01:59:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1108. [2020-10-15 01:59:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1108 states. [2020-10-15 01:59:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1559 transitions. [2020-10-15 01:59:12,928 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1559 transitions. Word has length 228 [2020-10-15 01:59:12,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:59:12,929 INFO L479 AbstractCegarLoop]: Abstraction has 1108 states and 1559 transitions. [2020-10-15 01:59:12,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 01:59:12,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1559 transitions. [2020-10-15 01:59:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-15 01:59:12,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:59:12,931 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 15, 15, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:59:12,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-15 01:59:12,931 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:59:12,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:59:12,932 INFO L82 PathProgramCache]: Analyzing trace with hash 408795747, now seen corresponding path program 4 times [2020-10-15 01:59:12,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:59:12,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140476071] [2020-10-15 01:59:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:59:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:59:13,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:13,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:14,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:15,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:15,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:18,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:59:18,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-15 01:59:18,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 01:59:18,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-15 01:59:18,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:59:18,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:59:18,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 01:59:18,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:59:18,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-15 01:59:18,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:59:18,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:59:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:59:18,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:18,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:59:18,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:59:18,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:59:18,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 01:59:18,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:59:18,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:59:18,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:59:18,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:59:18,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:59:18,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:59:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 159 proven. 1078 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-15 01:59:18,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140476071] [2020-10-15 01:59:18,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:59:18,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 01:59:18,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672407600] [2020-10-15 01:59:18,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 01:59:18,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:59:18,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 01:59:18,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-15 01:59:18,333 INFO L87 Difference]: Start difference. First operand 1108 states and 1559 transitions. Second operand 14 states. [2020-10-15 01:59:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:59:20,372 INFO L93 Difference]: Finished difference Result 2369 states and 3309 transitions. [2020-10-15 01:59:20,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 01:59:20,373 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 243 [2020-10-15 01:59:20,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:59:20,380 INFO L225 Difference]: With dead ends: 2369 [2020-10-15 01:59:20,380 INFO L226 Difference]: Without dead ends: 1268 [2020-10-15 01:59:20,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-15 01:59:20,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2020-10-15 01:59:20,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1195. [2020-10-15 01:59:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1195 states. [2020-10-15 01:59:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1684 transitions. [2020-10-15 01:59:20,414 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1684 transitions. Word has length 243 [2020-10-15 01:59:20,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:59:20,414 INFO L479 AbstractCegarLoop]: Abstraction has 1195 states and 1684 transitions. [2020-10-15 01:59:20,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 01:59:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1684 transitions. [2020-10-15 01:59:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-15 01:59:20,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:59:20,416 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 15, 15, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:59:20,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-15 01:59:20,417 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:59:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:59:20,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1221850718, now seen corresponding path program 4 times [2020-10-15 01:59:20,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:59:20,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845208011] [2020-10-15 01:59:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:59:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:59:20,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:25,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:59:25,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-15 01:59:25,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:59:25,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-15 01:59:25,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:59:25,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:59:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 01:59:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:59:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 231 [2020-10-15 01:59:25,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:59:26,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:59:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:59:26,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:26,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:59:26,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:59:26,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:59:26,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 01:59:26,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:59:26,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:59:26,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:59:26,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:59:26,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:59:26,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:59:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 60 proven. 1235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:59:26,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845208011] [2020-10-15 01:59:26,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:59:26,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-15 01:59:26,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801961886] [2020-10-15 01:59:26,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 01:59:26,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:59:26,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 01:59:26,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-15 01:59:26,226 INFO L87 Difference]: Start difference. First operand 1195 states and 1684 transitions. Second operand 23 states. [2020-10-15 01:59:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:59:35,831 INFO L93 Difference]: Finished difference Result 1227 states and 1720 transitions. [2020-10-15 01:59:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 01:59:35,832 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 244 [2020-10-15 01:59:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:59:35,837 INFO L225 Difference]: With dead ends: 1227 [2020-10-15 01:59:35,837 INFO L226 Difference]: Without dead ends: 1225 [2020-10-15 01:59:35,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 01:59:35,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2020-10-15 01:59:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1195. [2020-10-15 01:59:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1195 states. [2020-10-15 01:59:35,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1683 transitions. [2020-10-15 01:59:35,869 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1683 transitions. Word has length 244 [2020-10-15 01:59:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:59:35,869 INFO L479 AbstractCegarLoop]: Abstraction has 1195 states and 1683 transitions. [2020-10-15 01:59:35,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 01:59:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1683 transitions. [2020-10-15 01:59:35,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-15 01:59:35,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:59:35,872 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 16, 16, 10, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:59:35,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-15 01:59:35,872 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:59:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:59:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1318987330, now seen corresponding path program 5 times [2020-10-15 01:59:35,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:59:35,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453848249] [2020-10-15 01:59:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:59:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:59:36,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:41,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:59:41,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-15 01:59:41,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:59:41,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-15 01:59:41,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:59:41,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:59:41,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 01:59:41,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:59:41,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 240 [2020-10-15 01:59:41,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:59:41,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:59:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:59:41,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:41,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:59:41,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:59:41,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:59:41,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 01:59:41,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:59:41,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:59:41,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:59:41,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:59:41,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:59:41,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:59:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 158 proven. 1322 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-15 01:59:41,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453848249] [2020-10-15 01:59:41,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:59:41,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 01:59:41,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547979599] [2020-10-15 01:59:41,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 01:59:41,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:59:41,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 01:59:41,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-15 01:59:41,287 INFO L87 Difference]: Start difference. First operand 1195 states and 1683 transitions. Second operand 15 states. [2020-10-15 01:59:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 01:59:43,468 INFO L93 Difference]: Finished difference Result 2541 states and 3548 transitions. [2020-10-15 01:59:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 01:59:43,469 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 261 [2020-10-15 01:59:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 01:59:43,475 INFO L225 Difference]: With dead ends: 2541 [2020-10-15 01:59:43,475 INFO L226 Difference]: Without dead ends: 1353 [2020-10-15 01:59:43,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-15 01:59:43,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2020-10-15 01:59:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1277. [2020-10-15 01:59:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1277 states. [2020-10-15 01:59:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1796 transitions. [2020-10-15 01:59:43,515 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1796 transitions. Word has length 261 [2020-10-15 01:59:43,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 01:59:43,515 INFO L479 AbstractCegarLoop]: Abstraction has 1277 states and 1796 transitions. [2020-10-15 01:59:43,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 01:59:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1796 transitions. [2020-10-15 01:59:43,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-15 01:59:43,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 01:59:43,517 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 17, 17, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 01:59:43,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-15 01:59:43,518 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 01:59:43,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 01:59:43,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1138052799, now seen corresponding path program 5 times [2020-10-15 01:59:43,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 01:59:43,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107628680] [2020-10-15 01:59:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 01:59:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:59:43,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:48,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:59:48,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-15 01:59:48,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:59:48,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5152 [2020-10-15 01:59:48,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:59:48,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:59:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-15 01:59:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 01:59:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 261 [2020-10-15 01:59:48,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:59:49,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 01:59:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 01:59:49,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 01:59:49,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 01:59:49,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 01:59:49,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 01:59:49,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 01:59:49,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 01:59:49,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 01:59:49,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 01:59:49,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 01:59:49,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 01:59:49,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 01:59:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 69 proven. 1624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 01:59:49,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107628680] [2020-10-15 01:59:49,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 01:59:49,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 01:59:49,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571109529] [2020-10-15 01:59:49,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 01:59:49,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 01:59:49,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 01:59:49,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-15 01:59:49,845 INFO L87 Difference]: Start difference. First operand 1277 states and 1796 transitions. Second operand 26 states. [2020-10-15 02:00:02,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:00:02,603 INFO L93 Difference]: Finished difference Result 1316 states and 1841 transitions. [2020-10-15 02:00:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 02:00:02,604 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 274 [2020-10-15 02:00:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:00:02,607 INFO L225 Difference]: With dead ends: 1316 [2020-10-15 02:00:02,607 INFO L226 Difference]: Without dead ends: 1314 [2020-10-15 02:00:02,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 02:00:02,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2020-10-15 02:00:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1278. [2020-10-15 02:00:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1278 states. [2020-10-15 02:00:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1797 transitions. [2020-10-15 02:00:02,640 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1797 transitions. Word has length 274 [2020-10-15 02:00:02,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:00:02,641 INFO L479 AbstractCegarLoop]: Abstraction has 1278 states and 1797 transitions. [2020-10-15 02:00:02,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 02:00:02,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1797 transitions. [2020-10-15 02:00:02,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-15 02:00:02,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:00:02,643 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 18, 18, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:00:02,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-15 02:00:02,644 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:00:02,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:00:02,644 INFO L82 PathProgramCache]: Analyzing trace with hash 589114866, now seen corresponding path program 5 times [2020-10-15 02:00:02,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:00:02,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887239330] [2020-10-15 02:00:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:00:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:00:02,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:00:03,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:00:05,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:00:05,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:00:06,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:00:07,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:00:07,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-15 02:00:07,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 02:00:07,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-15 02:00:07,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:00:07,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:00:07,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 02:00:07,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-15 02:00:07,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-10-15 02:00:07,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 02:00:08,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:00:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:00:08,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:00:08,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:00:08,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 02:00:08,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:00:08,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 02:00:08,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:00:08,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:00:08,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:00:08,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:00:08,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:00:08,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 02:00:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 759 proven. 1000 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-10-15 02:00:08,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887239330] [2020-10-15 02:00:08,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 02:00:08,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 02:00:08,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895506378] [2020-10-15 02:00:08,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 02:00:08,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:00:08,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 02:00:08,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-15 02:00:08,280 INFO L87 Difference]: Start difference. First operand 1278 states and 1797 transitions. Second operand 16 states. [2020-10-15 02:00:11,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:00:11,441 INFO L93 Difference]: Finished difference Result 2010 states and 2794 transitions. [2020-10-15 02:00:11,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 02:00:11,442 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 289 [2020-10-15 02:00:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:00:11,444 INFO L225 Difference]: With dead ends: 2010 [2020-10-15 02:00:11,444 INFO L226 Difference]: Without dead ends: 739 [2020-10-15 02:00:11,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 02:00:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2020-10-15 02:00:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 680. [2020-10-15 02:00:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-10-15 02:00:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 939 transitions. [2020-10-15 02:00:11,468 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 939 transitions. Word has length 289 [2020-10-15 02:00:11,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:00:11,469 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 939 transitions. [2020-10-15 02:00:11,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 02:00:11,469 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 939 transitions. [2020-10-15 02:00:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-15 02:00:11,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:00:11,471 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 18, 18, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:00:11,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-15 02:00:11,471 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:00:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:00:11,472 INFO L82 PathProgramCache]: Analyzing trace with hash 73074675, now seen corresponding path program 5 times [2020-10-15 02:00:11,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:00:11,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454972795] [2020-10-15 02:00:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:00:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:00:11,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:00:16,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:00:16,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-15 02:00:16,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:00:16,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-15 02:00:16,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:00:16,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:00:16,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 02:00:16,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 02:00:16,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 277 [2020-10-15 02:00:16,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 02:00:17,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:00:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:00:17,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:00:17,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:00:17,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 02:00:17,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:00:17,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 02:00:17,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:00:17,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:00:17,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:00:17,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:00:17,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:00:17,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 02:00:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 72 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 02:00:17,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454972795] [2020-10-15 02:00:17,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 02:00:17,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-15 02:00:17,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645939490] [2020-10-15 02:00:17,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 02:00:17,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:00:17,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 02:00:17,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-15 02:00:17,674 INFO L87 Difference]: Start difference. First operand 680 states and 939 transitions. Second operand 27 states. [2020-10-15 02:00:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:00:31,482 INFO L93 Difference]: Finished difference Result 720 states and 983 transitions. [2020-10-15 02:00:31,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 02:00:31,483 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 290 [2020-10-15 02:00:31,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:00:31,485 INFO L225 Difference]: With dead ends: 720 [2020-10-15 02:00:31,485 INFO L226 Difference]: Without dead ends: 718 [2020-10-15 02:00:31,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 02:00:31,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-10-15 02:00:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 680. [2020-10-15 02:00:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-10-15 02:00:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 938 transitions. [2020-10-15 02:00:31,509 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 938 transitions. Word has length 290 [2020-10-15 02:00:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:00:31,509 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 938 transitions. [2020-10-15 02:00:31,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 02:00:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 938 transitions. [2020-10-15 02:00:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-15 02:00:31,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:00:31,512 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 19, 19, 12, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:00:31,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-15 02:00:31,512 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:00:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:00:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash 867398673, now seen corresponding path program 6 times [2020-10-15 02:00:31,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:00:31,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459708441] [2020-10-15 02:00:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:00:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:00:31,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:00:36,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:00:36,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-15 02:00:36,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:00:36,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-15 02:00:36,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:00:36,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:00:36,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-15 02:00:36,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 02:00:36,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 286 [2020-10-15 02:00:36,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 02:00:36,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:00:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:00:36,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:00:36,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:00:36,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 02:00:36,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:00:36,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 02:00:36,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:00:36,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:00:36,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:00:36,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:00:36,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:00:36,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 02:00:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 188 proven. 1910 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-15 02:00:36,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459708441] [2020-10-15 02:00:36,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 02:00:36,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 02:00:36,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553269347] [2020-10-15 02:00:36,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 02:00:36,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:00:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 02:00:36,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-15 02:00:36,936 INFO L87 Difference]: Start difference. First operand 680 states and 938 transitions. Second operand 17 states. [2020-10-15 02:00:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:00:39,376 INFO L93 Difference]: Finished difference Result 1494 states and 2049 transitions. [2020-10-15 02:00:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 02:00:39,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 307 [2020-10-15 02:00:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:00:39,379 INFO L225 Difference]: With dead ends: 1494 [2020-10-15 02:00:39,379 INFO L226 Difference]: Without dead ends: 821 [2020-10-15 02:00:39,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-15 02:00:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2020-10-15 02:00:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 724. [2020-10-15 02:00:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2020-10-15 02:00:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 999 transitions. [2020-10-15 02:00:39,398 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 999 transitions. Word has length 307 [2020-10-15 02:00:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:00:39,398 INFO L479 AbstractCegarLoop]: Abstraction has 724 states and 999 transitions. [2020-10-15 02:00:39,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 02:00:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 999 transitions. [2020-10-15 02:00:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-15 02:00:39,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:00:39,400 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 20, 20, 13, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:00:39,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-15 02:00:39,400 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:00:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:00:39,401 INFO L82 PathProgramCache]: Analyzing trace with hash -651129902, now seen corresponding path program 6 times [2020-10-15 02:00:39,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:00:39,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192948302] [2020-10-15 02:00:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:00:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:00:39,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:00:44,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:00:44,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-15 02:00:44,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:00:44,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-15 02:00:44,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:00:44,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:00:44,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-15 02:00:44,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 02:00:44,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 307 [2020-10-15 02:00:44,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 02:00:45,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:00:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:00:45,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:00:45,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:00:45,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 02:00:45,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:00:45,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 02:00:45,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:00:45,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:00:45,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:00:45,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:00:45,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:00:45,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 02:00:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2351 backedges. 81 proven. 2270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 02:00:46,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192948302] [2020-10-15 02:00:46,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 02:00:46,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-15 02:00:46,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479346389] [2020-10-15 02:00:46,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 02:00:46,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:00:46,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 02:00:46,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-15 02:00:46,169 INFO L87 Difference]: Start difference. First operand 724 states and 999 transitions. Second operand 30 states. [2020-10-15 02:01:03,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:01:03,466 INFO L93 Difference]: Finished difference Result 809 states and 1106 transitions. [2020-10-15 02:01:03,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 02:01:03,466 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 320 [2020-10-15 02:01:03,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:01:03,468 INFO L225 Difference]: With dead ends: 809 [2020-10-15 02:01:03,469 INFO L226 Difference]: Without dead ends: 807 [2020-10-15 02:01:03,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 02:01:03,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2020-10-15 02:01:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 765. [2020-10-15 02:01:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-10-15 02:01:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1055 transitions. [2020-10-15 02:01:03,486 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1055 transitions. Word has length 320 [2020-10-15 02:01:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:01:03,487 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 1055 transitions. [2020-10-15 02:01:03,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 02:01:03,487 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1055 transitions. [2020-10-15 02:01:03,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-15 02:01:03,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:01:03,489 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 22, 22, 14, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:01:03,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-15 02:01:03,489 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:01:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:01:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash 927920032, now seen corresponding path program 7 times [2020-10-15 02:01:03,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:01:03,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783365514] [2020-10-15 02:01:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:01:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:01:03,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:01:08,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:01:08,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-15 02:01:08,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:01:08,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5189 [2020-10-15 02:01:08,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:01:08,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:01:08,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-15 02:01:08,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 02:01:08,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 332 [2020-10-15 02:01:08,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 02:01:09,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:01:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:01:09,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:01:09,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:01:09,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 02:01:09,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:01:09,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 02:01:09,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:01:09,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:01:09,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:01:09,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:01:09,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:01:09,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 02:01:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2894 backedges. 218 proven. 2606 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-15 02:01:09,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783365514] [2020-10-15 02:01:09,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 02:01:09,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 02:01:09,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478737773] [2020-10-15 02:01:09,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 02:01:09,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:01:09,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 02:01:09,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-15 02:01:09,217 INFO L87 Difference]: Start difference. First operand 765 states and 1055 transitions. Second operand 19 states. [2020-10-15 02:01:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:01:12,128 INFO L93 Difference]: Finished difference Result 1670 states and 2290 transitions. [2020-10-15 02:01:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 02:01:12,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 353 [2020-10-15 02:01:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:01:12,130 INFO L225 Difference]: With dead ends: 1670 [2020-10-15 02:01:12,130 INFO L226 Difference]: Without dead ends: 912 [2020-10-15 02:01:12,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 02:01:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2020-10-15 02:01:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 809. [2020-10-15 02:01:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2020-10-15 02:01:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1116 transitions. [2020-10-15 02:01:12,150 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1116 transitions. Word has length 353 [2020-10-15 02:01:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:01:12,150 INFO L479 AbstractCegarLoop]: Abstraction has 809 states and 1116 transitions. [2020-10-15 02:01:12,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 02:01:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1116 transitions. [2020-10-15 02:01:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-10-15 02:01:12,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:01:12,153 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 23, 23, 15, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:01:12,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-15 02:01:12,153 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:01:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:01:12,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2076667741, now seen corresponding path program 7 times [2020-10-15 02:01:12,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:01:12,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805299967] [2020-10-15 02:01:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:01:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:01:12,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:01:17,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:01:17,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 372 [2020-10-15 02:01:17,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:01:17,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-15 02:01:17,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:01:17,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:01:17,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-15 02:01:17,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 02:01:17,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 353 [2020-10-15 02:01:17,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 02:01:18,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:01:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:01:18,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:01:18,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:01:18,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 02:01:18,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:01:18,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 02:01:18,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:01:18,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:01:18,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:01:18,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:01:18,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:01:18,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 02:01:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3117 backedges. 93 proven. 3024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 02:01:19,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805299967] [2020-10-15 02:01:19,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 02:01:19,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-15 02:01:19,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112930165] [2020-10-15 02:01:19,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-15 02:01:19,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:01:19,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-15 02:01:19,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 02:01:19,247 INFO L87 Difference]: Start difference. First operand 809 states and 1116 transitions. Second operand 34 states.