/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-cav19/array_doub_access_init_const.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:26:06,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:26:06,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:26:06,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:26:06,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:26:06,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:26:06,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:26:06,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:26:06,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:26:06,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:26:06,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:26:06,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:26:06,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:26:06,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:26:06,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:26:06,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:26:06,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:26:06,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:26:06,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:26:06,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:26:06,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:26:06,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:26:06,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:26:06,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:26:06,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:26:06,505 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:26:06,505 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:26:06,508 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:26:06,509 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:26:06,510 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:26:06,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:26:06,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:26:06,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:26:06,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:26:06,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:26:06,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:26:06,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:26:06,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:26:06,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:26:06,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:26:06,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:26:06,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:26:06,567 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:26:06,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:26:06,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:26:06,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:26:06,570 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:26:06,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:26:06,571 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:26:06,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:26:06,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:26:06,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:26:06,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:26:06,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:26:06,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:26:06,574 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:26:06,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:26:06,574 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:26:06,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:26:06,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:26:06,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:26:06,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:26:06,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:26:06,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:26:06,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:26:06,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:26:06,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:26:06,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:26:06,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:26:06,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:26:06,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:26:06,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:26:06,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:26:06,897 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:26:06,901 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:26:06,902 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:26:06,903 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:26:06,903 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_doub_access_init_const.c [2020-10-13 04:26:06,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a96ec5d2e/6e0e520cc8f747a3a00962cbd7832324/FLAGb43b131f3 [2020-10-13 04:26:07,417 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:26:07,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_doub_access_init_const.c [2020-10-13 04:26:07,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a96ec5d2e/6e0e520cc8f747a3a00962cbd7832324/FLAGb43b131f3 [2020-10-13 04:26:07,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a96ec5d2e/6e0e520cc8f747a3a00962cbd7832324 [2020-10-13 04:26:07,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:26:07,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:26:07,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:26:07,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:26:07,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:26:07,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:26:07" (1/1) ... [2020-10-13 04:26:07,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d2b9410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:07, skipping insertion in model container [2020-10-13 04:26:07,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:26:07" (1/1) ... [2020-10-13 04:26:07,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:26:07,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:26:07,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:26:08,000 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:26:08,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:26:08,035 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:26:08,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08 WrapperNode [2020-10-13 04:26:08,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:26:08,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:26:08,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:26:08,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:26:08,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... [2020-10-13 04:26:08,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:26:08,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:26:08,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:26:08,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:26:08,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:26:08,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:26:08,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:26:08,212 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 04:26:08,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:26:08,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:26:08,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:26:08,213 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 04:26:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 04:26:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:26:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:26:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:26:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:26:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:26:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:26:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:26:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:26:08,474 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:26:08,475 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 04:26:08,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:26:08 BoogieIcfgContainer [2020-10-13 04:26:08,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:26:08,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:26:08,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:26:08,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:26:08,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:26:07" (1/3) ... [2020-10-13 04:26:08,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@640cd521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:26:08, skipping insertion in model container [2020-10-13 04:26:08,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:26:08" (2/3) ... [2020-10-13 04:26:08,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@640cd521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:26:08, skipping insertion in model container [2020-10-13 04:26:08,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:26:08" (3/3) ... [2020-10-13 04:26:08,491 INFO L109 eAbstractionObserver]: Analyzing ICFG array_doub_access_init_const.c [2020-10-13 04:26:08,504 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:26:08,514 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:26:08,531 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:26:08,560 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:26:08,561 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:26:08,561 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:26:08,561 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:26:08,561 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:26:08,561 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:26:08,562 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:26:08,562 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:26:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 04:26:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 04:26:08,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:08,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:08,594 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:08,601 INFO L82 PathProgramCache]: Analyzing trace with hash 48820346, now seen corresponding path program 1 times [2020-10-13 04:26:08,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:08,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103828130] [2020-10-13 04:26:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:08,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:08,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:08,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 04:26:08,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:08,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-13 04:26:08,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:08,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:26:08,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:08,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:26:08,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:26:08,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:08,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:09,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:09,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:09,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:26:09,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:09,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:09,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:09,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:09,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:09,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103828130] [2020-10-13 04:26:09,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:26:09,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:26:09,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329600242] [2020-10-13 04:26:09,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:26:09,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:09,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:26:09,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:26:09,044 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2020-10-13 04:26:09,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:09,150 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-10-13 04:26:09,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:26:09,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-13 04:26:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:09,161 INFO L225 Difference]: With dead ends: 42 [2020-10-13 04:26:09,162 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 04:26:09,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:26:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 04:26:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-13 04:26:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 04:26:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-13 04:26:09,208 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2020-10-13 04:26:09,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:09,208 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-13 04:26:09,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:26:09,209 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-13 04:26:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:26:09,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:09,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:09,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:26:09,211 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:09,211 INFO L82 PathProgramCache]: Analyzing trace with hash -298336104, now seen corresponding path program 1 times [2020-10-13 04:26:09,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:09,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629054668] [2020-10-13 04:26:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:09,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:09,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:26:09,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:09,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-13 04:26:09,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:09,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:26:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:09,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:26:09,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:09,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:09,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:09,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:09,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:09,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:09,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:09,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:09,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629054668] [2020-10-13 04:26:09,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:09,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:26:09,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31262803] [2020-10-13 04:26:09,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:26:09,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:09,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:26:09,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:26:09,688 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-10-13 04:26:09,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:09,758 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-13 04:26:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:26:09,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-13 04:26:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:09,761 INFO L225 Difference]: With dead ends: 34 [2020-10-13 04:26:09,761 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 04:26:09,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:26:09,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 04:26:09,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-13 04:26:09,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 04:26:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-13 04:26:09,769 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2020-10-13 04:26:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:09,770 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-13 04:26:09,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:26:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-13 04:26:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:26:09,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:09,771 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:09,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:26:09,772 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:09,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1091764534, now seen corresponding path program 2 times [2020-10-13 04:26:09,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:09,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862316714] [2020-10-13 04:26:09,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:09,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:09,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:10,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:26:10,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:10,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-13 04:26:10,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:10,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:26:10,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:10,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:26:10,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:10,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:10,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:10,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:10,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:10,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:10,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:10,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:10,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:10,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:10,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862316714] [2020-10-13 04:26:10,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:10,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:26:10,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595634018] [2020-10-13 04:26:10,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:26:10,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:10,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:26:10,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:26:10,103 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-10-13 04:26:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:10,179 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-13 04:26:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:26:10,180 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-13 04:26:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:10,181 INFO L225 Difference]: With dead ends: 36 [2020-10-13 04:26:10,181 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 04:26:10,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:26:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 04:26:10,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-13 04:26:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 04:26:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-13 04:26:10,188 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 17 [2020-10-13 04:26:10,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:10,189 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-13 04:26:10,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:26:10,189 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-13 04:26:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:26:10,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:10,190 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:10,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:26:10,191 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:10,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1243648596, now seen corresponding path program 3 times [2020-10-13 04:26:10,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:10,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868946790] [2020-10-13 04:26:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:10,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:26:10,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:10,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-13 04:26:10,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:10,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:26:10,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:10,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:26:10,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:10,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:10,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:10,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:10,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:10,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:10,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:10,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:10,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:10,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:10,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868946790] [2020-10-13 04:26:10,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:10,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:26:10,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629918516] [2020-10-13 04:26:10,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:26:10,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:10,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:26:10,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:26:10,720 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-10-13 04:26:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:10,802 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-13 04:26:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:26:10,803 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-13 04:26:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:10,804 INFO L225 Difference]: With dead ends: 38 [2020-10-13 04:26:10,804 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 04:26:10,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:26:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 04:26:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-13 04:26:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 04:26:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-13 04:26:10,811 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2020-10-13 04:26:10,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:10,811 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-13 04:26:10,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:26:10,811 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-13 04:26:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 04:26:10,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:10,812 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:10,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:26:10,813 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:10,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1175344114, now seen corresponding path program 4 times [2020-10-13 04:26:10,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:10,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147151051] [2020-10-13 04:26:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:10,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:10,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:11,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 04:26:11,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:11,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-13 04:26:11,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:11,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:26:11,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:11,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:26:11,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:11,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:11,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:11,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:11,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:11,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:11,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:11,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:11,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:11,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:11,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:11,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147151051] [2020-10-13 04:26:11,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:11,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:26:11,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583504467] [2020-10-13 04:26:11,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:26:11,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:11,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:26:11,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:26:11,214 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 8 states. [2020-10-13 04:26:11,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:11,301 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-13 04:26:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:26:11,302 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-13 04:26:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:11,303 INFO L225 Difference]: With dead ends: 40 [2020-10-13 04:26:11,303 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 04:26:11,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:26:11,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 04:26:11,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 04:26:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:26:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-13 04:26:11,310 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-10-13 04:26:11,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:11,311 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-13 04:26:11,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:26:11,311 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-13 04:26:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:26:11,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:11,312 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:11,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:26:11,312 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:11,313 INFO L82 PathProgramCache]: Analyzing trace with hash -40753648, now seen corresponding path program 5 times [2020-10-13 04:26:11,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:11,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558838612] [2020-10-13 04:26:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:11,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:11,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:11,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:26:11,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:11,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-13 04:26:11,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:11,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:26:11,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:11,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:26:11,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:12,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:12,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:12,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:12,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:12,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:12,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:12,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:12,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:12,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:12,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:12,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558838612] [2020-10-13 04:26:12,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:12,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:26:12,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779550873] [2020-10-13 04:26:12,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:26:12,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:12,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:26:12,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:26:12,042 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states. [2020-10-13 04:26:12,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:12,160 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-13 04:26:12,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:26:12,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-13 04:26:12,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:12,163 INFO L225 Difference]: With dead ends: 42 [2020-10-13 04:26:12,163 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 04:26:12,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:26:12,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 04:26:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-13 04:26:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 04:26:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-13 04:26:12,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 23 [2020-10-13 04:26:12,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:12,179 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-13 04:26:12,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:26:12,179 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-13 04:26:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:26:12,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:12,183 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:12,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:26:12,183 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:12,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:12,184 INFO L82 PathProgramCache]: Analyzing trace with hash -479598418, now seen corresponding path program 6 times [2020-10-13 04:26:12,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:12,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297491394] [2020-10-13 04:26:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:12,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:12,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:26:12,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:12,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-13 04:26:12,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:12,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:26:12,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:12,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:26:12,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:12,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:12,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:12,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:12,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:12,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:12,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:26:12,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:12,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:12,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:12,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:12,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:12,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297491394] [2020-10-13 04:26:12,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:12,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:26:12,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808572094] [2020-10-13 04:26:12,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:26:12,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:12,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:26:12,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:26:12,983 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-10-13 04:26:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:13,133 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-13 04:26:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:26:13,133 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-13 04:26:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:13,134 INFO L225 Difference]: With dead ends: 44 [2020-10-13 04:26:13,135 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 04:26:13,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:26:13,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 04:26:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-13 04:26:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:26:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-13 04:26:13,141 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2020-10-13 04:26:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:13,142 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-13 04:26:13,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:26:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-13 04:26:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:26:13,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:13,143 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:13,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:26:13,144 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1302627380, now seen corresponding path program 7 times [2020-10-13 04:26:13,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:13,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386753079] [2020-10-13 04:26:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:13,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:13,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:14,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:14,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:26:14,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:14,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1805 [2020-10-13 04:26:14,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:14,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:26:14,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:14,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:26:14,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:15,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:15,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:15,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:15,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:15,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:15,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:15,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:15,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:15,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:15,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:15,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:15,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386753079] [2020-10-13 04:26:15,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:15,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:26:15,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137494104] [2020-10-13 04:26:15,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:26:15,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:15,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:26:15,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:26:15,121 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 11 states. [2020-10-13 04:26:15,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:15,247 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-13 04:26:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:26:15,248 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-13 04:26:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:15,249 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:26:15,249 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 04:26:15,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:26:15,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 04:26:15,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-13 04:26:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 04:26:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-13 04:26:15,255 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2020-10-13 04:26:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:15,256 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-13 04:26:15,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:26:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-13 04:26:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:26:15,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:15,257 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:15,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:26:15,258 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:15,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:15,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1959477398, now seen corresponding path program 8 times [2020-10-13 04:26:15,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:15,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082339536] [2020-10-13 04:26:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:15,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:15,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:16,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:26:16,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:16,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-10-13 04:26:16,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:16,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:26:16,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:16,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:26:16,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:16,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:16,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:16,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:16,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:16,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:16,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:16,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:16,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:16,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:16,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:16,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082339536] [2020-10-13 04:26:16,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:16,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:26:16,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362070759] [2020-10-13 04:26:16,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:26:16,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:16,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:26:16,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:26:16,422 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 12 states. [2020-10-13 04:26:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:16,529 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-13 04:26:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:26:16,530 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-13 04:26:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:16,531 INFO L225 Difference]: With dead ends: 48 [2020-10-13 04:26:16,531 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 04:26:16,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:26:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 04:26:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-13 04:26:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 04:26:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-13 04:26:16,537 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2020-10-13 04:26:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:16,537 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-13 04:26:16,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:26:16,538 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-13 04:26:16,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:26:16,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:16,539 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:16,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:26:16,539 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:16,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:16,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1832152184, now seen corresponding path program 9 times [2020-10-13 04:26:16,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:16,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942775292] [2020-10-13 04:26:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:16,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:16,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:17,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:17,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 04:26:17,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:17,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1245 [2020-10-13 04:26:17,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:17,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:26:17,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:17,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:26:17,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:17,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:17,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:17,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:17,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:17,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:17,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:17,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:17,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:17,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:17,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:17,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:17,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942775292] [2020-10-13 04:26:17,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:17,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:26:17,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782194348] [2020-10-13 04:26:17,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:26:17,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:17,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:26:17,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:26:17,930 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-10-13 04:26:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:18,078 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-13 04:26:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:26:18,079 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-13 04:26:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:18,080 INFO L225 Difference]: With dead ends: 50 [2020-10-13 04:26:18,080 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 04:26:18,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:26:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 04:26:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-13 04:26:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 04:26:18,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-13 04:26:18,085 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2020-10-13 04:26:18,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:18,086 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-13 04:26:18,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:26:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-13 04:26:18,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 04:26:18,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:18,087 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:18,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:26:18,088 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:18,088 INFO L82 PathProgramCache]: Analyzing trace with hash 268294182, now seen corresponding path program 10 times [2020-10-13 04:26:18,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:18,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696053745] [2020-10-13 04:26:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:18,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:18,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:19,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:19,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 04:26:19,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:19,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1723 [2020-10-13 04:26:19,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:19,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:26:19,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:19,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:26:19,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:19,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:19,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:19,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:19,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:19,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:19,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:19,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:19,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:19,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:19,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696053745] [2020-10-13 04:26:19,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:19,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:26:19,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303809136] [2020-10-13 04:26:19,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:26:19,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:19,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:26:19,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:26:19,984 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2020-10-13 04:26:20,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:20,123 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-13 04:26:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:26:20,123 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-13 04:26:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:20,124 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:26:20,125 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:26:20,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:26:20,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:26:20,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-13 04:26:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:26:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-13 04:26:20,131 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 33 [2020-10-13 04:26:20,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:20,131 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-13 04:26:20,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:26:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-13 04:26:20,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:26:20,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:20,133 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:20,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:26:20,133 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash 162622788, now seen corresponding path program 11 times [2020-10-13 04:26:20,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:20,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480844880] [2020-10-13 04:26:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:20,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:20,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:21,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:21,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:26:21,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:21,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1508 [2020-10-13 04:26:21,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:21,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:26:21,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:21,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:26:21,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:21,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:21,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:21,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:21,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:21,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:21,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:21,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:21,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:21,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:21,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:21,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:21,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480844880] [2020-10-13 04:26:21,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:21,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:26:21,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874450117] [2020-10-13 04:26:21,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:26:21,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:21,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:26:21,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:26:21,827 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 15 states. [2020-10-13 04:26:21,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:21,942 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-13 04:26:21,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:26:21,942 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-13 04:26:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:21,943 INFO L225 Difference]: With dead ends: 54 [2020-10-13 04:26:21,943 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 04:26:21,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:26:21,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 04:26:21,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-13 04:26:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 04:26:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-13 04:26:21,951 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 35 [2020-10-13 04:26:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:21,952 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-13 04:26:21,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:26:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-13 04:26:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:26:21,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:21,956 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:21,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:26:21,957 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:21,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1691628258, now seen corresponding path program 12 times [2020-10-13 04:26:21,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:21,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508507524] [2020-10-13 04:26:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:21,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:22,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:23,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:23,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:26:23,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:23,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1868 [2020-10-13 04:26:23,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:23,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:26:23,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:23,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:26:23,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:23,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:24,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:24,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:24,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:24,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:24,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:24,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:24,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:24,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:24,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:24,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:24,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508507524] [2020-10-13 04:26:24,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:24,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:26:24,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988676076] [2020-10-13 04:26:24,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:26:24,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:24,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:26:24,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:26:24,012 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-10-13 04:26:24,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:24,124 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-13 04:26:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:26:24,124 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-13 04:26:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:24,125 INFO L225 Difference]: With dead ends: 56 [2020-10-13 04:26:24,125 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 04:26:24,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:26:24,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 04:26:24,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-13 04:26:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:26:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-13 04:26:24,131 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 37 [2020-10-13 04:26:24,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:24,132 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-13 04:26:24,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:26:24,132 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-13 04:26:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:26:24,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:24,133 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:24,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:26:24,134 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:24,134 INFO L82 PathProgramCache]: Analyzing trace with hash -2107897600, now seen corresponding path program 13 times [2020-10-13 04:26:24,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:24,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653916608] [2020-10-13 04:26:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:24,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:24,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:26,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:26,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:26:26,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:26,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1959 [2020-10-13 04:26:26,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:26,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:26:26,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:26,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:26:26,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:26,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:26,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:26,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:26,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:26,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:26,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:26,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:26,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:26,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:26,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:26,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:26,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653916608] [2020-10-13 04:26:26,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:26,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:26:26,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815766176] [2020-10-13 04:26:26,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:26:26,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:26,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:26:26,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:26:26,323 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 17 states. [2020-10-13 04:26:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:26,486 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-13 04:26:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:26:26,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-13 04:26:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:26,488 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:26:26,488 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 04:26:26,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:26:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 04:26:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-13 04:26:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:26:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-13 04:26:26,494 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 39 [2020-10-13 04:26:26,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:26,494 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-13 04:26:26,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:26:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-13 04:26:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 04:26:26,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:26,495 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:26,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:26:26,496 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:26,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:26,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1564921758, now seen corresponding path program 14 times [2020-10-13 04:26:26,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:26,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775137645] [2020-10-13 04:26:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:26,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:26,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:28,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:28,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 04:26:28,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:28,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2461 [2020-10-13 04:26:28,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:28,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:26:28,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:28,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:26:28,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:29,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:29,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:29,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:29,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:29,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:29,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:29,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:29,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:29,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:29,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:29,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:29,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775137645] [2020-10-13 04:26:29,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:29,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:26:29,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127872873] [2020-10-13 04:26:29,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:26:29,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:29,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:26:29,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:26:29,190 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 18 states. [2020-10-13 04:26:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:29,351 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-13 04:26:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:26:29,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-13 04:26:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:29,352 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:26:29,352 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:26:29,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:26:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:26:29,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 04:26:29,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 04:26:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-13 04:26:29,366 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 41 [2020-10-13 04:26:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:29,366 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-13 04:26:29,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:26:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-13 04:26:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 04:26:29,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:29,368 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:29,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:26:29,368 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:29,368 INFO L82 PathProgramCache]: Analyzing trace with hash 681207484, now seen corresponding path program 15 times [2020-10-13 04:26:29,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:29,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002094336] [2020-10-13 04:26:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:29,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:29,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:31,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:31,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 04:26:31,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:31,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2510 [2020-10-13 04:26:31,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:31,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:26:31,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:31,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:26:31,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:32,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:32,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:32,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:32,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:32,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:32,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:32,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:32,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:32,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:32,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:32,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002094336] [2020-10-13 04:26:32,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:32,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:26:32,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896209692] [2020-10-13 04:26:32,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:26:32,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:32,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:26:32,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:26:32,148 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 19 states. [2020-10-13 04:26:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:32,280 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-13 04:26:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:26:32,281 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-13 04:26:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:32,282 INFO L225 Difference]: With dead ends: 62 [2020-10-13 04:26:32,282 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 04:26:32,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:26:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 04:26:32,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-13 04:26:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 04:26:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-13 04:26:32,287 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 43 [2020-10-13 04:26:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:32,288 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-13 04:26:32,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:26:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-13 04:26:32,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 04:26:32,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:32,289 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:32,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:26:32,289 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:32,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1835314778, now seen corresponding path program 16 times [2020-10-13 04:26:32,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:32,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544154095] [2020-10-13 04:26:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:32,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:32,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:34,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:34,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 04:26:34,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:34,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2344 [2020-10-13 04:26:34,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:34,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:26:34,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:34,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:26:34,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:34,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:34,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:34,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:34,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:34,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:34,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:26:34,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:34,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:34,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:34,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:34,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:34,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544154095] [2020-10-13 04:26:34,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:34,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:26:34,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708003981] [2020-10-13 04:26:34,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:26:34,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:34,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:26:34,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:26:34,884 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 20 states. [2020-10-13 04:26:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:34,977 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-13 04:26:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:26:34,977 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-13 04:26:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:34,978 INFO L225 Difference]: With dead ends: 64 [2020-10-13 04:26:34,978 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 04:26:34,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:26:34,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 04:26:34,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 04:26:34,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:26:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-13 04:26:34,983 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 45 [2020-10-13 04:26:34,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:34,983 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-13 04:26:34,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:26:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-13 04:26:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:26:34,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:34,984 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:34,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:26:34,984 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:34,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1464105352, now seen corresponding path program 17 times [2020-10-13 04:26:34,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:34,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992041154] [2020-10-13 04:26:34,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:35,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:35,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:37,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:37,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:26:37,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:37,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2089 [2020-10-13 04:26:37,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:37,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:26:37,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:37,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:26:37,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:37,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:37,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:37,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:37,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:37,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:37,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:37,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:37,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:37,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:37,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:37,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:37,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992041154] [2020-10-13 04:26:37,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:37,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:26:37,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339879588] [2020-10-13 04:26:37,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:26:37,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:37,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:26:37,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:26:37,382 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 21 states. [2020-10-13 04:26:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:37,494 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-13 04:26:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:26:37,494 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-13 04:26:37,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:37,495 INFO L225 Difference]: With dead ends: 66 [2020-10-13 04:26:37,495 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 04:26:37,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:26:37,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 04:26:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-13 04:26:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:26:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-13 04:26:37,499 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 47 [2020-10-13 04:26:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:37,500 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-13 04:26:37,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:26:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-13 04:26:37,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 04:26:37,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:37,501 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:37,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:26:37,501 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:37,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:37,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1773981462, now seen corresponding path program 18 times [2020-10-13 04:26:37,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:37,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913947269] [2020-10-13 04:26:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:37,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:37,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:40,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:40,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:26:40,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:40,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2624 [2020-10-13 04:26:40,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:40,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:26:40,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:40,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:26:40,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:40,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:40,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:40,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:40,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:40,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:40,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:40,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:40,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:40,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:40,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:40,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:40,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913947269] [2020-10-13 04:26:40,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:40,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:26:40,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126798692] [2020-10-13 04:26:40,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:26:40,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:40,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:26:40,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:26:40,439 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 22 states. [2020-10-13 04:26:40,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:40,606 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-13 04:26:40,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:26:40,607 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-13 04:26:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:40,608 INFO L225 Difference]: With dead ends: 68 [2020-10-13 04:26:40,608 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:26:40,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:26:40,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:26:40,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 04:26:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:26:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-13 04:26:40,613 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 49 [2020-10-13 04:26:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:40,613 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-13 04:26:40,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:26:40,614 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-13 04:26:40,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:26:40,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:40,614 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:40,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:26:40,615 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:40,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:40,615 INFO L82 PathProgramCache]: Analyzing trace with hash -275879884, now seen corresponding path program 19 times [2020-10-13 04:26:40,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:40,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918193553] [2020-10-13 04:26:40,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:40,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:40,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:43,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:43,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:26:43,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:43,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2793 [2020-10-13 04:26:43,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:43,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:26:43,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:43,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:26:43,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:43,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:43,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:43,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:43,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:43,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:43,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:43,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:43,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:43,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:43,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:43,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:43,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918193553] [2020-10-13 04:26:43,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:43,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:26:43,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478533843] [2020-10-13 04:26:43,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:26:43,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:43,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:26:43,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:26:43,754 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 23 states. [2020-10-13 04:26:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:43,993 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-13 04:26:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:26:43,994 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-13 04:26:43,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:43,995 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:26:43,995 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:26:43,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:26:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:26:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-13 04:26:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:26:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-13 04:26:44,001 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 51 [2020-10-13 04:26:44,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:44,001 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-13 04:26:44,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:26:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-13 04:26:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 04:26:44,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:44,002 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:44,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:26:44,003 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:44,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1197355474, now seen corresponding path program 20 times [2020-10-13 04:26:44,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:44,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436594090] [2020-10-13 04:26:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:44,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:44,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:47,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:47,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 04:26:47,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:47,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3652 [2020-10-13 04:26:47,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:47,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:26:47,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:47,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:26:47,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:48,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:48,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:48,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:48,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:48,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:48,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:48,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:48,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:48,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:48,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:48,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:48,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436594090] [2020-10-13 04:26:48,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:48,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:26:48,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226142016] [2020-10-13 04:26:48,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:26:48,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:48,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:26:48,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:26:48,103 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 24 states. [2020-10-13 04:26:48,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:48,314 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-13 04:26:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:26:48,314 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-13 04:26:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:48,315 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:26:48,316 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:26:48,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:26:48,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:26:48,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-13 04:26:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 04:26:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-13 04:26:48,321 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 53 [2020-10-13 04:26:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:48,321 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-13 04:26:48,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:26:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-13 04:26:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 04:26:48,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:48,322 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:48,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:26:48,322 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:48,323 INFO L82 PathProgramCache]: Analyzing trace with hash -362673168, now seen corresponding path program 21 times [2020-10-13 04:26:48,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:48,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853401251] [2020-10-13 04:26:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:48,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:48,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:52,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:52,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 04:26:52,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:52,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3967 [2020-10-13 04:26:52,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:52,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:26:52,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:52,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:26:52,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:52,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:52,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:52,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:52,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:52,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:52,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:52,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:52,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:52,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:52,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:52,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:26:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:52,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853401251] [2020-10-13 04:26:52,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:52,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:26:52,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232708872] [2020-10-13 04:26:52,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:26:52,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:52,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:26:52,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:26:52,803 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 25 states. [2020-10-13 04:26:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:53,035 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-13 04:26:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:26:53,037 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-13 04:26:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:53,038 INFO L225 Difference]: With dead ends: 74 [2020-10-13 04:26:53,038 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 04:26:53,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:26:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 04:26:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-13 04:26:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 04:26:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-13 04:26:53,051 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2020-10-13 04:26:53,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:53,052 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-13 04:26:53,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:26:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-13 04:26:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 04:26:53,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:53,053 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:53,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:26:53,054 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:53,057 INFO L82 PathProgramCache]: Analyzing trace with hash -606611826, now seen corresponding path program 22 times [2020-10-13 04:26:53,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:53,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976956494] [2020-10-13 04:26:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:53,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:54,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:57,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:57,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 04:26:57,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:26:57,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4351 [2020-10-13 04:26:57,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:26:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:26:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:26:57,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:57,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:26:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:57,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:26:57,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:26:57,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:26:57,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:26:57,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:26:57,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:26:57,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:26:57,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:26:57,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:26:57,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:26:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:26:57,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976956494] [2020-10-13 04:26:57,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:26:57,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:26:57,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399903873] [2020-10-13 04:26:57,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:26:57,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:26:57,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:26:57,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:26:57,825 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 26 states. [2020-10-13 04:26:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:26:58,003 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-13 04:26:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:26:58,003 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-13 04:26:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:26:58,004 INFO L225 Difference]: With dead ends: 76 [2020-10-13 04:26:58,004 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 04:26:58,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:26:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 04:26:58,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-13 04:26:58,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:26:58,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-13 04:26:58,010 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 57 [2020-10-13 04:26:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:26:58,011 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-13 04:26:58,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:26:58,011 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-13 04:26:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:26:58,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:26:58,015 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:26:58,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:26:58,016 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:26:58,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:26:58,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1191539116, now seen corresponding path program 23 times [2020-10-13 04:26:58,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:26:58,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287225074] [2020-10-13 04:26:58,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:26:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:26:58,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:00,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:03,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:03,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:27:03,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:03,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:27:03,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:03,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:27:03,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:03,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:27:03,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:03,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:03,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:03,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:03,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:03,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:03,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:03,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:03,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:03,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:03,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:03,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:03,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287225074] [2020-10-13 04:27:03,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:03,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:27:03,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183478461] [2020-10-13 04:27:03,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:27:03,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:03,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:27:03,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:27:03,440 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 27 states. [2020-10-13 04:27:03,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:03,692 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-13 04:27:03,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:27:03,693 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-10-13 04:27:03,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:03,693 INFO L225 Difference]: With dead ends: 78 [2020-10-13 04:27:03,693 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:27:03,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:27:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:27:03,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 04:27:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 04:27:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-13 04:27:03,701 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 59 [2020-10-13 04:27:03,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:03,701 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-13 04:27:03,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:27:03,701 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-13 04:27:03,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 04:27:03,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:03,702 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:03,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:27:03,704 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:03,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:03,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1657225910, now seen corresponding path program 24 times [2020-10-13 04:27:03,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:03,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6766771] [2020-10-13 04:27:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:03,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:03,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:08,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:08,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 04:27:08,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:08,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:27:08,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:08,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:27:08,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:08,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:27:08,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:09,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:09,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:09,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:09,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:09,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:09,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:09,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:09,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:09,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:09,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:09,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:09,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6766771] [2020-10-13 04:27:09,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:09,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:27:09,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980908769] [2020-10-13 04:27:09,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:27:09,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:09,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:27:09,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:27:09,200 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 28 states. [2020-10-13 04:27:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:09,396 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-13 04:27:09,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:27:09,396 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-10-13 04:27:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:09,397 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:27:09,398 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 04:27:09,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:27:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 04:27:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 04:27:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:27:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-13 04:27:09,402 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 61 [2020-10-13 04:27:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:09,403 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-13 04:27:09,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:27:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-13 04:27:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 04:27:09,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:09,404 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:09,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:27:09,404 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:09,404 INFO L82 PathProgramCache]: Analyzing trace with hash 868718952, now seen corresponding path program 25 times [2020-10-13 04:27:09,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:09,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139166794] [2020-10-13 04:27:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:09,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:11,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:14,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:14,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 04:27:14,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:14,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:27:14,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:14,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:27:14,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:14,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:27:14,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:14,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:14,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:14,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:14,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:14,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:14,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:14,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:14,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:14,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:14,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:14,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:14,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139166794] [2020-10-13 04:27:14,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:14,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:27:14,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903772918] [2020-10-13 04:27:14,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:27:14,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:14,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:27:14,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:27:14,921 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 29 states. [2020-10-13 04:27:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:15,078 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-13 04:27:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:27:15,079 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-10-13 04:27:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:15,080 INFO L225 Difference]: With dead ends: 82 [2020-10-13 04:27:15,080 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 04:27:15,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:27:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 04:27:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-13 04:27:15,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 04:27:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-13 04:27:15,089 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 63 [2020-10-13 04:27:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:15,089 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-13 04:27:15,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:27:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-13 04:27:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 04:27:15,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:15,090 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:15,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:27:15,091 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:15,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1645209094, now seen corresponding path program 26 times [2020-10-13 04:27:15,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:15,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723343625] [2020-10-13 04:27:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:15,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:15,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:20,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:20,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 04:27:20,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:20,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:27:20,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:20,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:27:20,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:20,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:27:20,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:20,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:20,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:20,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:20,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:20,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:20,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:20,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:20,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:20,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723343625] [2020-10-13 04:27:20,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:20,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:27:20,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007284973] [2020-10-13 04:27:20,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:27:20,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:20,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:27:20,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:27:20,642 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 30 states. [2020-10-13 04:27:20,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:20,802 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-13 04:27:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:27:20,803 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 65 [2020-10-13 04:27:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:20,804 INFO L225 Difference]: With dead ends: 84 [2020-10-13 04:27:20,804 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 04:27:20,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:27:20,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 04:27:20,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-13 04:27:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:27:20,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-13 04:27:20,810 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 65 [2020-10-13 04:27:20,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:20,810 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-13 04:27:20,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:27:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-13 04:27:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:27:20,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:20,811 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:20,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:27:20,812 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:20,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:20,812 INFO L82 PathProgramCache]: Analyzing trace with hash 527926052, now seen corresponding path program 27 times [2020-10-13 04:27:20,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:20,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79013597] [2020-10-13 04:27:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:20,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:21,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:25,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:25,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 04:27:25,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:25,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:27:25,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:25,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:27:25,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:25,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:27:25,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:26,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:26,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:26,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:26,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:26,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:26,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:26,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:26,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:26,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:26,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:26,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:26,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79013597] [2020-10-13 04:27:26,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:26,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:27:26,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516258940] [2020-10-13 04:27:26,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:27:26,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:26,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:27:26,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:27:26,362 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 31 states. [2020-10-13 04:27:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:26,582 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-13 04:27:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:27:26,583 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2020-10-13 04:27:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:26,584 INFO L225 Difference]: With dead ends: 86 [2020-10-13 04:27:26,585 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 04:27:26,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:27:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 04:27:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-13 04:27:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 04:27:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-13 04:27:26,590 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 67 [2020-10-13 04:27:26,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:26,591 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-13 04:27:26,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:27:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-13 04:27:26,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 04:27:26,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:26,592 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:26,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:27:26,592 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:26,592 INFO L82 PathProgramCache]: Analyzing trace with hash 560746690, now seen corresponding path program 28 times [2020-10-13 04:27:26,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:26,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792681616] [2020-10-13 04:27:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:26,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:26,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:31,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:31,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 04:27:31,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:31,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5198 [2020-10-13 04:27:31,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:31,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:27:31,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:31,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:27:31,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:32,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:32,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:32,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:32,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:32,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:32,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:32,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:32,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:32,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:32,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:32,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:32,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792681616] [2020-10-13 04:27:32,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:32,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:27:32,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520950564] [2020-10-13 04:27:32,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:27:32,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:32,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:27:32,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:27:32,406 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 32 states. [2020-10-13 04:27:32,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:32,728 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-13 04:27:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:27:32,729 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 69 [2020-10-13 04:27:32,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:32,730 INFO L225 Difference]: With dead ends: 88 [2020-10-13 04:27:32,730 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 04:27:32,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:27:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 04:27:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 04:27:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:27:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-13 04:27:32,738 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 69 [2020-10-13 04:27:32,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:32,738 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-13 04:27:32,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:27:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-13 04:27:32,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:27:32,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:32,740 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:32,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:27:32,741 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:32,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:32,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2036608736, now seen corresponding path program 29 times [2020-10-13 04:27:32,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:32,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195310027] [2020-10-13 04:27:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:32,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:33,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:37,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:37,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:27:37,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:37,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 04:27:37,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:37,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:27:37,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:37,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:27:37,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:38,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:38,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:38,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:38,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:38,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:38,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:38,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:38,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:38,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:38,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:38,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:38,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195310027] [2020-10-13 04:27:38,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:38,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:27:38,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047784165] [2020-10-13 04:27:38,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:27:38,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:38,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:27:38,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:27:38,402 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 33 states. [2020-10-13 04:27:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:38,688 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-13 04:27:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:27:38,688 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 71 [2020-10-13 04:27:38,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:38,690 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:27:38,690 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 04:27:38,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:27:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 04:27:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-13 04:27:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 04:27:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-10-13 04:27:38,695 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 71 [2020-10-13 04:27:38,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:38,696 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-10-13 04:27:38,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:27:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-10-13 04:27:38,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 04:27:38,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:38,697 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:38,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:27:38,697 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:38,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:38,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1294140034, now seen corresponding path program 30 times [2020-10-13 04:27:38,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:38,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577632103] [2020-10-13 04:27:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:38,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:38,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:43,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:43,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 04:27:43,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:43,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5252 [2020-10-13 04:27:43,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:43,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:27:43,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:43,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:27:43,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:44,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:44,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:44,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:44,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:44,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:44,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:27:44,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:44,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:44,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:44,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:44,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:27:44,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577632103] [2020-10-13 04:27:44,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:44,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:27:44,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679064952] [2020-10-13 04:27:44,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:27:44,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:44,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:27:44,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:27:44,739 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 34 states. [2020-10-13 04:27:44,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:44,945 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-13 04:27:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:27:44,946 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2020-10-13 04:27:44,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:44,947 INFO L225 Difference]: With dead ends: 92 [2020-10-13 04:27:44,947 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:27:44,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:27:44,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:27:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-13 04:27:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:27:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-13 04:27:44,960 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 73 [2020-10-13 04:27:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:44,960 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-13 04:27:44,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:27:44,960 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-13 04:27:44,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:27:44,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:44,961 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:44,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:27:44,962 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:44,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1901894812, now seen corresponding path program 31 times [2020-10-13 04:27:44,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:44,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340290615] [2020-10-13 04:27:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:44,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:50,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:50,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:27:50,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:50,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-13 04:27:50,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:50,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:27:50,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:50,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 04:27:50,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:51,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:27:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:51,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:51,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:51,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:27:51,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:27:51,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:27:51,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:51,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:27:51,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:27:51,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:27:51,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:27:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2020-10-13 04:27:51,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340290615] [2020-10-13 04:27:51,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:27:51,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:27:51,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367065116] [2020-10-13 04:27:51,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:27:51,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:27:51,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:27:51,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:27:51,108 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 9 states. [2020-10-13 04:27:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:27:51,290 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2020-10-13 04:27:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:27:51,290 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 75 [2020-10-13 04:27:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:27:51,291 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:27:51,292 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 04:27:51,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:27:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 04:27:51,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-13 04:27:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 04:27:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-13 04:27:51,299 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 75 [2020-10-13 04:27:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:27:51,300 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-13 04:27:51,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:27:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-13 04:27:51,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:27:51,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:27:51,301 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:27:51,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:27:51,301 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:27:51,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:27:51,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1208086829, now seen corresponding path program 1 times [2020-10-13 04:27:51,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:27:51,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900984783] [2020-10-13 04:27:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:27:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:27:51,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:51,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:27:59,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:27:59,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 04:27:59,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:27:59,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7922 [2020-10-13 04:27:59,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:27:59,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:27:59,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:27:59,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:27:59,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:00,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:00,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:00,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:00,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:00,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:00,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:00,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:00,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:00,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:00,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:00,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:00,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-13 04:28:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:00,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:00,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:00,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:00,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:00,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:00,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:00,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:00,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:00,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:00,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:28:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 04:28:00,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900984783] [2020-10-13 04:28:00,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:00,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:28:00,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941995419] [2020-10-13 04:28:00,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:28:00,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:00,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:28:00,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:28:00,048 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 35 states. [2020-10-13 04:28:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:00,257 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-10-13 04:28:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:28:00,259 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 83 [2020-10-13 04:28:00,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:00,264 INFO L225 Difference]: With dead ends: 106 [2020-10-13 04:28:00,264 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:28:00,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:28:00,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:28:00,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-13 04:28:00,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:28:00,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-10-13 04:28:00,277 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2020-10-13 04:28:00,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:00,278 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-10-13 04:28:00,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:28:00,278 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-10-13 04:28:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 04:28:00,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:00,279 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:00,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:28:00,279 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:00,279 INFO L82 PathProgramCache]: Analyzing trace with hash 563077233, now seen corresponding path program 2 times [2020-10-13 04:28:00,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:00,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51569347] [2020-10-13 04:28:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:00,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:04,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:05,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:05,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:28:05,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:28:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:28:05,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:05,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:28:05,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:05,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 04:28:05,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:06,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:06,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:06,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:06,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:06,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:06,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:28:06,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:06,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:06,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:06,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:06,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:06,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-13 04:28:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:06,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:06,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:06,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:06,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:06,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:06,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:06,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:28:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 04:28:06,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51569347] [2020-10-13 04:28:06,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:06,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:28:06,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434627118] [2020-10-13 04:28:06,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:28:06,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:06,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:28:06,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:28:06,129 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 36 states. [2020-10-13 04:28:06,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:06,388 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-13 04:28:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:28:06,388 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 85 [2020-10-13 04:28:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:06,389 INFO L225 Difference]: With dead ends: 108 [2020-10-13 04:28:06,389 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 04:28:06,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:28:06,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 04:28:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-13 04:28:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 04:28:06,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-10-13 04:28:06,402 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 85 [2020-10-13 04:28:06,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:06,403 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-10-13 04:28:06,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:28:06,403 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-10-13 04:28:06,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 04:28:06,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:06,404 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:06,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:28:06,404 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:06,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:06,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1844691599, now seen corresponding path program 3 times [2020-10-13 04:28:06,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:06,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578062505] [2020-10-13 04:28:06,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:06,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:06,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:14,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:14,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 04:28:14,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:28:14,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8535 [2020-10-13 04:28:14,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:14,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:28:14,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:14,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:28:14,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:15,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:15,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:15,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:15,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:15,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:15,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:15,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:15,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:15,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:15,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-13 04:28:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:15,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:15,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:15,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:15,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:15,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:15,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:15,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:15,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:15,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:15,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 04:28:15,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578062505] [2020-10-13 04:28:15,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:15,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:28:15,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342429041] [2020-10-13 04:28:15,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:28:15,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:28:15,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:28:15,783 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 37 states. [2020-10-13 04:28:16,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:16,177 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2020-10-13 04:28:16,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:28:16,179 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 87 [2020-10-13 04:28:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:16,180 INFO L225 Difference]: With dead ends: 110 [2020-10-13 04:28:16,180 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 04:28:16,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:28:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 04:28:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-13 04:28:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:28:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-13 04:28:16,188 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2020-10-13 04:28:16,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:16,188 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-13 04:28:16,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:28:16,189 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-13 04:28:16,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 04:28:16,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:16,190 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:16,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:28:16,190 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:16,190 INFO L82 PathProgramCache]: Analyzing trace with hash 820483373, now seen corresponding path program 4 times [2020-10-13 04:28:16,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:16,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950011864] [2020-10-13 04:28:16,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:16,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:25,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:25,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 04:28:25,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:25,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9478 [2020-10-13 04:28:25,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:25,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:28:25,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:25,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 04:28:25,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:27,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:27,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:27,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:27,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:27,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:27,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:27,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:27,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:27,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:27,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:27,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:28:27,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-13 04:28:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:27,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:27,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:27,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:27,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:27,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:27,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:27,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:28:27,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:27,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:28:27,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2020-10-13 04:28:27,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950011864] [2020-10-13 04:28:27,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:27,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:28:27,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409404507] [2020-10-13 04:28:27,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:28:27,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:27,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:28:27,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:28:27,209 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 10 states. [2020-10-13 04:28:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:27,409 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2020-10-13 04:28:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:28:27,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-10-13 04:28:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:27,411 INFO L225 Difference]: With dead ends: 104 [2020-10-13 04:28:27,411 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 04:28:27,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:28:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 04:28:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-10-13 04:28:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:28:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-10-13 04:28:27,423 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 89 [2020-10-13 04:28:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:27,424 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-10-13 04:28:27,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:28:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-10-13 04:28:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 04:28:27,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:27,425 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:27,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:28:27,425 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:27,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1814829468, now seen corresponding path program 5 times [2020-10-13 04:28:27,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:27,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026911115] [2020-10-13 04:28:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:27,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:28,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:36,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:36,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 04:28:36,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:28:36,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8632 [2020-10-13 04:28:36,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:36,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:28:36,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:36,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 04:28:36,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:37,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:37,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:37,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:37,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:37,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:37,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:37,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:37,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:37,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:37,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:37,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:37,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-13 04:28:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:37,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:37,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:37,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:37,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:37,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:37,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:37,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:37,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:37,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:37,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:37,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-13 04:28:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:37,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:37,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:37,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:37,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:37,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:37,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:37,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:37,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:37,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:37,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 4 proven. 1156 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:28:37,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026911115] [2020-10-13 04:28:37,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:37,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:28:37,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207497089] [2020-10-13 04:28:37,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:28:37,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:37,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:28:37,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:28:37,060 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 38 states. [2020-10-13 04:28:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:37,252 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-10-13 04:28:37,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:28:37,253 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 97 [2020-10-13 04:28:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:37,254 INFO L225 Difference]: With dead ends: 128 [2020-10-13 04:28:37,254 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 04:28:37,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:28:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 04:28:37,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-13 04:28:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:28:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-13 04:28:37,272 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 97 [2020-10-13 04:28:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:37,274 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-13 04:28:37,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:28:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-13 04:28:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:28:37,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:37,276 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:37,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:28:37,276 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:37,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:37,276 INFO L82 PathProgramCache]: Analyzing trace with hash 47156098, now seen corresponding path program 6 times [2020-10-13 04:28:37,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:37,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461025551] [2020-10-13 04:28:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:37,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:38,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:55,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:55,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 04:28:55,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:28:55,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17982 [2020-10-13 04:28:55,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:55,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:28:55,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:28:55,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 04:28:55,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:56,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:28:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:56,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:56,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:56,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:28:56,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:56,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:28:56,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:56,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:56,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:28:56,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:56,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:56,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-13 04:28:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:56,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:56,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:56,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:56,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:56,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:56,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:56,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:56,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-13 04:28:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:56,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:56,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:28:56,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:28:56,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:28:56,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:28:56,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:28:56,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:28:56,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:28:56,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:28:56,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:28:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 4 proven. 1225 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:28:56,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461025551] [2020-10-13 04:28:56,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:28:56,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:28:56,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109213828] [2020-10-13 04:28:56,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:28:56,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:28:56,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:28:56,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:28:56,239 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 39 states. [2020-10-13 04:28:56,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:28:56,452 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2020-10-13 04:28:56,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:28:56,452 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 99 [2020-10-13 04:28:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:28:56,453 INFO L225 Difference]: With dead ends: 130 [2020-10-13 04:28:56,454 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 04:28:56,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:28:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 04:28:56,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 04:28:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:28:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-10-13 04:28:56,461 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2020-10-13 04:28:56,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:28:56,462 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-10-13 04:28:56,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:28:56,462 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-10-13 04:28:56,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 04:28:56,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:28:56,463 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:28:56,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:28:56,463 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:28:56,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:28:56,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1586077408, now seen corresponding path program 7 times [2020-10-13 04:28:56,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:28:56,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490355665] [2020-10-13 04:28:56,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:28:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:28:56,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:28:57,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:03,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:03,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 04:29:03,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:29:03,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7441 [2020-10-13 04:29:03,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:03,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:29:03,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:03,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 04:29:03,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:04,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:04,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:04,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:04,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:04,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:04,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:04,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:04,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:04,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:04,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:04,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:04,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-13 04:29:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:04,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:04,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:04,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:04,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:04,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:04,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:04,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:04,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:04,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:04,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-13 04:29:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:04,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:04,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:04,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:04,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:04,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:04,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:04,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:04,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:04,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:04,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 4 proven. 1296 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:29:04,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490355665] [2020-10-13 04:29:04,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:04,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:29:04,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778775581] [2020-10-13 04:29:04,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:29:04,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:04,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:29:04,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:29:04,883 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 40 states. [2020-10-13 04:29:05,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:05,155 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-10-13 04:29:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:29:05,156 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 101 [2020-10-13 04:29:05,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:05,158 INFO L225 Difference]: With dead ends: 132 [2020-10-13 04:29:05,158 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 04:29:05,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:29:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 04:29:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 04:29:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 04:29:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-10-13 04:29:05,167 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2020-10-13 04:29:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:05,167 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-10-13 04:29:05,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:29:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-10-13 04:29:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 04:29:05,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:05,168 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:05,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:29:05,168 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:05,169 INFO L82 PathProgramCache]: Analyzing trace with hash 834553662, now seen corresponding path program 8 times [2020-10-13 04:29:05,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:05,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164945454] [2020-10-13 04:29:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:05,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:06,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:16,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:16,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:29:16,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:29:16,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11719 [2020-10-13 04:29:16,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:16,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:29:16,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:16,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 04:29:16,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:17,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:17,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:17,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:17,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:17,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:17,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:17,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:17,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:17,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:29:17,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-13 04:29:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:17,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:17,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:17,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:17,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:17,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:17,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:17,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:17,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:17,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:17,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:17,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-13 04:29:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:17,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:17,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:17,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:17,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:17,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:17,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:17,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:17,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:17,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:17,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 4 proven. 1369 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:29:17,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164945454] [2020-10-13 04:29:17,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:17,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:29:17,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712610579] [2020-10-13 04:29:17,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:29:17,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:17,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:29:17,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:29:17,941 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 41 states. [2020-10-13 04:29:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:18,322 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2020-10-13 04:29:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:29:18,323 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 103 [2020-10-13 04:29:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:18,325 INFO L225 Difference]: With dead ends: 134 [2020-10-13 04:29:18,325 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 04:29:18,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:29:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 04:29:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-13 04:29:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 04:29:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-10-13 04:29:18,332 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2020-10-13 04:29:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:18,333 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-10-13 04:29:18,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:29:18,333 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-10-13 04:29:18,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 04:29:18,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:18,334 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:18,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:29:18,334 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:18,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:18,335 INFO L82 PathProgramCache]: Analyzing trace with hash -811262500, now seen corresponding path program 9 times [2020-10-13 04:29:18,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:18,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703533279] [2020-10-13 04:29:18,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:18,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:19,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:36,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:36,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 04:29:36,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:29:36,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18253 [2020-10-13 04:29:36,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:29:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 04:29:36,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:37,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:37,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:37,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:37,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:37,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:37,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:37,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:37,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:37,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:37,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:37,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:29:37,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-13 04:29:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:37,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:37,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:37,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:37,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:37,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:37,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:37,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:37,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:37,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:37,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:37,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-13 04:29:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:37,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:37,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:37,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:37,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:37,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:29:37,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:37,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:37,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 04:29:37,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:37,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 4 proven. 1444 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:29:37,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703533279] [2020-10-13 04:29:37,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:37,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:29:37,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002840713] [2020-10-13 04:29:37,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:29:37,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:37,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:29:37,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:29:37,694 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 42 states. [2020-10-13 04:29:38,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:38,142 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2020-10-13 04:29:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:29:38,142 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 105 [2020-10-13 04:29:38,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:38,144 INFO L225 Difference]: With dead ends: 136 [2020-10-13 04:29:38,144 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 04:29:38,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:29:38,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 04:29:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-13 04:29:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 04:29:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2020-10-13 04:29:38,154 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 105 [2020-10-13 04:29:38,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:38,155 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2020-10-13 04:29:38,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:29:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2020-10-13 04:29:38,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:29:38,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:38,157 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:38,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:29:38,157 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:38,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:38,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1892629254, now seen corresponding path program 10 times [2020-10-13 04:29:38,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:38,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128582924] [2020-10-13 04:29:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:38,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:54,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:54,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 04:29:54,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:54,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15830 [2020-10-13 04:29:54,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:54,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 04:29:54,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:29:54,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-13 04:29:54,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:56,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:29:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:56,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:56,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:56,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:29:56,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:56,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:56,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:56,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:29:56,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:56,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:29:56,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:56,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-13 04:29:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:56,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:56,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:56,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:56,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:56,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:29:56,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:56,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:56,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:56,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:56,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:56,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 04:29:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:56,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:29:56,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:29:56,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 04:29:56,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:29:56,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:29:56,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:29:56,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:29:56,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:29:56,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:29:56,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:29:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 4 proven. 123 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2020-10-13 04:29:56,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128582924] [2020-10-13 04:29:56,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:29:56,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:29:56,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991104223] [2020-10-13 04:29:56,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:29:56,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:29:56,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:29:56,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:29:56,384 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 12 states. [2020-10-13 04:29:56,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:29:56,791 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2020-10-13 04:29:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:29:56,793 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 107 [2020-10-13 04:29:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:29:56,795 INFO L225 Difference]: With dead ends: 122 [2020-10-13 04:29:56,795 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 04:29:56,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:29:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 04:29:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-13 04:29:56,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 04:29:56,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2020-10-13 04:29:56,802 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 107 [2020-10-13 04:29:56,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:29:56,803 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2020-10-13 04:29:56,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:29:56,803 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2020-10-13 04:29:56,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 04:29:56,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:29:56,803 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:29:56,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:29:56,804 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:29:56,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:29:56,804 INFO L82 PathProgramCache]: Analyzing trace with hash -464848591, now seen corresponding path program 11 times [2020-10-13 04:29:56,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:29:56,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048140415] [2020-10-13 04:29:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:29:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:29:56,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:30:03,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:30:03,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 04:30:03,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:30:03,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7029 [2020-10-13 04:30:03,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:30:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 04:30:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:30:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-13 04:30:03,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0