/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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 language data_model -i ../../../trunk/examples/svcomp/array-lopstr16/single_elem_safe.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 04:04:11,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 04:04:11,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 04:04:11,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 04:04:11,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 04:04:11,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 04:04:11,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 04:04:11,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 04:04:11,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 04:04:11,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 04:04:11,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 04:04:11,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 04:04:11,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 04:04:11,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 04:04:11,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 04:04:11,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 04:04:11,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 04:04:11,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 04:04:11,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 04:04:11,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 04:04:11,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 04:04:11,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 04:04:11,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 04:04:11,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 04:04:11,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 04:04:11,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 04:04:11,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 04:04:11,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 04:04:11,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 04:04:11,612 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 04:04:11,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 04:04:11,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 04:04:11,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 04:04:11,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 04:04:11,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 04:04:11,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 04:04:11,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 04:04:11,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 04:04:11,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 04:04:11,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 04:04:11,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 04:04:11,654 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 [2020-10-29 04:04:11,710 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 04:04:11,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 04:04:11,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 04:04:11,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 04:04:11,715 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 04:04:11,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 04:04:11,716 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 04:04:11,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 04:04:11,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 04:04:11,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 04:04:11,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 04:04:11,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 04:04:11,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 04:04:11,719 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 04:04:11,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 04:04:11,719 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 04:04:11,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 04:04:11,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 04:04:11,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 04:04:11,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 04:04:11,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 04:04:11,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 04:04:11,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 04:04:11,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 04:04:11,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 04:04:11,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 04:04:11,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 04:04:11,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 04:04:11,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 04:04:11,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 04:04:12,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 04:04:12,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 04:04:12,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 04:04:12,167 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 04:04:12,168 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 04:04:12,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/single_elem_safe.i [2020-10-29 04:04:12,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fcf4ecd56/cb10738d0be44d22879d0e0b6376f8e4/FLAGb1375fa07 [2020-10-29 04:04:12,951 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 04:04:12,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/single_elem_safe.i [2020-10-29 04:04:12,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fcf4ecd56/cb10738d0be44d22879d0e0b6376f8e4/FLAGb1375fa07 [2020-10-29 04:04:13,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fcf4ecd56/cb10738d0be44d22879d0e0b6376f8e4 [2020-10-29 04:04:13,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 04:04:13,328 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 04:04:13,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 04:04:13,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 04:04:13,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 04:04:13,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:04:13" (1/1) ... [2020-10-29 04:04:13,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b6e0d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:04:13, skipping insertion in model container [2020-10-29 04:04:13,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:04:13" (1/1) ... [2020-10-29 04:04:13,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 04:04:13,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 04:04:13,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 04:04:13,660 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 04:04:13,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 04:04:13,796 INFO L208 MainTranslator]: Completed translation [2020-10-29 04:04:13,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:04:13 WrapperNode [2020-10-29 04:04:13,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 04:04:13,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 04:04:13,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 04:04:13,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 04:04:13,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:04:13" (1/1) ... [2020-10-29 04:04:13,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:04:13" (1/1) ... [2020-10-29 04:04:13,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:04:13" (1/1) ... [2020-10-29 04:04:13,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:04:13" (1/1) ... [2020-10-29 04:04:13,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:04:13" (1/1) ... [2020-10-29 04:04:13,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:04:13" (1/1) ... [2020-10-29 04:04:13,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:04:13" (1/1) ... [2020-10-29 04:04:13,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 04:04:13,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 04:04:13,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 04:04:13,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 04:04:13,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:04:13" (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 [2020-10-29 04:04:14,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 04:04:14,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 04:04:14,054 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 04:04:14,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 04:04:14,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 04:04:14,055 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 04:04:14,055 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 04:04:14,055 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 04:04:14,055 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 04:04:14,056 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 04:04:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 04:04:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 04:04:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 04:04:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 04:04:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 04:04:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 04:04:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 04:04:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 04:04:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 04:04:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 04:04:14,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 04:04:14,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 04:04:14,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 04:04:14,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 04:04:14,572 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 04:04:14,573 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 04:04:14,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:04:14 BoogieIcfgContainer [2020-10-29 04:04:14,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 04:04:14,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 04:04:14,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 04:04:14,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 04:04:14,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:04:13" (1/3) ... [2020-10-29 04:04:14,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28555971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:04:14, skipping insertion in model container [2020-10-29 04:04:14,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:04:13" (2/3) ... [2020-10-29 04:04:14,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28555971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:04:14, skipping insertion in model container [2020-10-29 04:04:14,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:04:14" (3/3) ... [2020-10-29 04:04:14,586 INFO L111 eAbstractionObserver]: Analyzing ICFG single_elem_safe.i [2020-10-29 04:04:14,602 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 04:04:14,609 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 04:04:14,625 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 04:04:14,657 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 04:04:14,658 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 04:04:14,658 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 04:04:14,658 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 04:04:14,658 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 04:04:14,658 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 04:04:14,659 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 04:04:14,659 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 04:04:14,680 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-29 04:04:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 04:04:14,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:14,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:14,689 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:14,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1288471925, now seen corresponding path program 1 times [2020-10-29 04:04:14,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:14,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681448756] [2020-10-29 04:04:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:14,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:15,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:15,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:15,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 04:04:15,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 04:04:15,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-10-29 04:04:15,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:15,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 04:04:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 04:04:15,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 04:04:15,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:15,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:15,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:15,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:15,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:15,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-29 04:04:15,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:15,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:15,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:15,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:15,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:15,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:04:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:04:15,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681448756] [2020-10-29 04:04:15,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 04:04:15,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 04:04:15,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952965574] [2020-10-29 04:04:15,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 04:04:15,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:15,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 04:04:15,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 04:04:15,919 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-10-29 04:04:16,233 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-29 04:04:16,513 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2020-10-29 04:04:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:16,689 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-10-29 04:04:16,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 04:04:16,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-29 04:04:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:16,703 INFO L225 Difference]: With dead ends: 70 [2020-10-29 04:04:16,704 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 04:04:16,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-29 04:04:16,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 04:04:16,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-29 04:04:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 04:04:16,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-29 04:04:16,763 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 17 [2020-10-29 04:04:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:16,764 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-29 04:04:16,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 04:04:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-29 04:04:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 04:04:16,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:16,766 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:16,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 04:04:16,767 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:16,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:16,768 INFO L82 PathProgramCache]: Analyzing trace with hash 772836779, now seen corresponding path program 1 times [2020-10-29 04:04:16,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:16,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031953345] [2020-10-29 04:04:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:16,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:16,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:17,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:17,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 04:04:17,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 04:04:17,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-29 04:04:17,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:17,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:17,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 04:04:17,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:17,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 04:04:17,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:04:17,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:17,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:17,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:17,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:17,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:17,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-29 04:04:17,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:17,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:17,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:17,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:17,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:04:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 04:04:17,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031953345] [2020-10-29 04:04:17,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:17,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 04:04:17,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408455172] [2020-10-29 04:04:17,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 04:04:17,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:17,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 04:04:17,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 04:04:17,471 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2020-10-29 04:04:17,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:17,792 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2020-10-29 04:04:17,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 04:04:17,793 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-29 04:04:17,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:17,794 INFO L225 Difference]: With dead ends: 56 [2020-10-29 04:04:17,795 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 04:04:17,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 04:04:17,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 04:04:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2020-10-29 04:04:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 04:04:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-29 04:04:17,823 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-10-29 04:04:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:17,823 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-29 04:04:17,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 04:04:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-29 04:04:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 04:04:17,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:17,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:17,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 04:04:17,827 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:17,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:17,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1924609839, now seen corresponding path program 1 times [2020-10-29 04:04:17,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:17,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993705525] [2020-10-29 04:04:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:17,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:17,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:18,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:18,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:19,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:19,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 04:04:19,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 04:04:19,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1292 [2020-10-29 04:04:19,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:19,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:19,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 04:04:19,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:19,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 04:04:19,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:04:19,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:19,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:19,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:19,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:19,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:19,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 04:04:19,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:19,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:19,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:19,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:19,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:19,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:04:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:04:19,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993705525] [2020-10-29 04:04:19,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:19,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 04:04:19,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064846434] [2020-10-29 04:04:19,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 04:04:19,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:19,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 04:04:19,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-29 04:04:19,599 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 10 states. [2020-10-29 04:04:19,804 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-10-29 04:04:20,185 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-29 04:04:20,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:20,504 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2020-10-29 04:04:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 04:04:20,505 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-29 04:04:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:20,506 INFO L225 Difference]: With dead ends: 63 [2020-10-29 04:04:20,506 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 04:04:20,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:04:20,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 04:04:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-10-29 04:04:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 04:04:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2020-10-29 04:04:20,517 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 22 [2020-10-29 04:04:20,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:20,518 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2020-10-29 04:04:20,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 04:04:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2020-10-29 04:04:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 04:04:20,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:20,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:20,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 04:04:20,520 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1178608648, now seen corresponding path program 1 times [2020-10-29 04:04:20,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:20,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642876677] [2020-10-29 04:04:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:20,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:20,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:20,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:20,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:20,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:21,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:21,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:21,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:23,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:23,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 04:04:23,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 04:04:23,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2803 [2020-10-29 04:04:23,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:23,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:23,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 04:04:23,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 04:04:23,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 04:04:23,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:23,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:23,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:23,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:23,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:23,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 04:04:23,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:23,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:23,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:23,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:23,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:23,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:04:23,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642876677] [2020-10-29 04:04:23,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:23,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 04:04:23,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354956393] [2020-10-29 04:04:23,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 04:04:23,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:23,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 04:04:23,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 04:04:23,637 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand 8 states. [2020-10-29 04:04:23,975 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-29 04:04:24,163 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-29 04:04:24,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:24,386 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2020-10-29 04:04:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 04:04:24,386 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-29 04:04:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:24,388 INFO L225 Difference]: With dead ends: 84 [2020-10-29 04:04:24,388 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 04:04:24,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-29 04:04:24,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 04:04:24,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-10-29 04:04:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 04:04:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-29 04:04:24,407 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 23 [2020-10-29 04:04:24,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:24,408 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-29 04:04:24,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 04:04:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-29 04:04:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 04:04:24,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:24,412 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:24,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 04:04:24,412 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:24,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1664436056, now seen corresponding path program 1 times [2020-10-29 04:04:24,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:24,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883825982] [2020-10-29 04:04:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:24,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:24,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:24,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:24,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:24,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:25,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:27,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:27,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 04:04:27,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:04:27,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3022 [2020-10-29 04:04:27,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:27,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:27,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 04:04:27,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:27,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 04:04:27,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:04:27,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:27,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:27,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:27,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:27,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:27,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 04:04:27,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:27,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:27,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:27,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:27,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:27,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:04:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:04:27,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883825982] [2020-10-29 04:04:27,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:27,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 04:04:27,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064923985] [2020-10-29 04:04:27,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 04:04:27,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:27,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 04:04:27,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-29 04:04:27,934 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 10 states. [2020-10-29 04:04:28,596 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-29 04:04:28,826 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-29 04:04:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:29,452 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2020-10-29 04:04:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 04:04:29,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-29 04:04:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:29,456 INFO L225 Difference]: With dead ends: 78 [2020-10-29 04:04:29,456 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 04:04:29,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-29 04:04:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 04:04:29,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-29 04:04:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 04:04:29,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-10-29 04:04:29,482 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 26 [2020-10-29 04:04:29,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:29,483 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-10-29 04:04:29,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 04:04:29,483 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-10-29 04:04:29,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 04:04:29,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:29,487 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:29,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 04:04:29,488 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:29,489 INFO L82 PathProgramCache]: Analyzing trace with hash -616404014, now seen corresponding path program 2 times [2020-10-29 04:04:29,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:29,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636635451] [2020-10-29 04:04:29,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:29,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:29,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:29,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:29,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:30,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:30,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:31,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:31,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 04:04:31,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:04:31,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1758 [2020-10-29 04:04:31,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:31,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:31,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 04:04:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 04:04:31,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:31,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:31,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:31,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:31,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:31,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:31,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 04:04:31,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:31,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:31,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:31,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:31,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:31,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:04:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:04:31,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636635451] [2020-10-29 04:04:31,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:31,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 04:04:31,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296188050] [2020-10-29 04:04:31,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 04:04:31,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:31,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 04:04:31,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-29 04:04:31,817 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 12 states. [2020-10-29 04:04:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:33,103 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2020-10-29 04:04:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 04:04:33,103 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-29 04:04:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:33,107 INFO L225 Difference]: With dead ends: 140 [2020-10-29 04:04:33,107 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 04:04:33,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2020-10-29 04:04:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 04:04:33,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 64. [2020-10-29 04:04:33,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 04:04:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2020-10-29 04:04:33,127 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 27 [2020-10-29 04:04:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:33,129 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2020-10-29 04:04:33,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 04:04:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2020-10-29 04:04:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 04:04:33,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:33,131 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:33,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 04:04:33,131 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:33,132 INFO L82 PathProgramCache]: Analyzing trace with hash -283409467, now seen corresponding path program 1 times [2020-10-29 04:04:33,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:33,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017488104] [2020-10-29 04:04:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:33,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:33,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:33,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:33,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:33,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:34,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:34,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:35,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:35,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 04:04:35,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:04:35,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2479 [2020-10-29 04:04:35,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:35,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:35,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 04:04:35,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:35,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 04:04:35,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:36,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:36,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:36,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:36,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:36,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:36,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 04:04:36,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:36,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:36,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:36,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:36,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:36,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:04:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:04:36,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017488104] [2020-10-29 04:04:36,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:36,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 04:04:36,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845649257] [2020-10-29 04:04:36,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 04:04:36,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:36,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 04:04:36,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-29 04:04:36,100 INFO L87 Difference]: Start difference. First operand 64 states and 85 transitions. Second operand 11 states. [2020-10-29 04:04:36,369 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-29 04:04:36,516 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-29 04:04:36,876 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-29 04:04:37,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:37,465 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2020-10-29 04:04:37,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 04:04:37,466 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-29 04:04:37,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:37,467 INFO L225 Difference]: With dead ends: 147 [2020-10-29 04:04:37,468 INFO L226 Difference]: Without dead ends: 118 [2020-10-29 04:04:37,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-10-29 04:04:37,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-29 04:04:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 59. [2020-10-29 04:04:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 04:04:37,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2020-10-29 04:04:37,493 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 28 [2020-10-29 04:04:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:37,493 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2020-10-29 04:04:37,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 04:04:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2020-10-29 04:04:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 04:04:37,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:37,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:37,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 04:04:37,496 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:37,497 INFO L82 PathProgramCache]: Analyzing trace with hash 226931607, now seen corresponding path program 1 times [2020-10-29 04:04:37,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:37,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495966341] [2020-10-29 04:04:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:37,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:37,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:37,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:38,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:38,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:39,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:40,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:40,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 04:04:40,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:04:40,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3437 [2020-10-29 04:04:40,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:40,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:40,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 04:04:40,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:40,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 04:04:40,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:41,756 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-10-29 04:04:42,128 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-29 04:04:42,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:42,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:42,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:42,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:42,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:42,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 04:04:42,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:42,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:42,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:42,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:42,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:42,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:04:42,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495966341] [2020-10-29 04:04:42,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:42,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 04:04:42,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045508826] [2020-10-29 04:04:42,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 04:04:42,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:42,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 04:04:42,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-29 04:04:42,304 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand 13 states. [2020-10-29 04:04:43,086 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-29 04:04:43,307 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-29 04:04:43,665 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-29 04:04:43,950 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-29 04:04:44,773 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-29 04:04:45,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:45,540 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2020-10-29 04:04:45,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 04:04:45,541 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-29 04:04:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:45,543 INFO L225 Difference]: With dead ends: 107 [2020-10-29 04:04:45,543 INFO L226 Difference]: Without dead ends: 92 [2020-10-29 04:04:45,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-29 04:04:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-29 04:04:45,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2020-10-29 04:04:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 04:04:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-10-29 04:04:45,557 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 28 [2020-10-29 04:04:45,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:45,557 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-10-29 04:04:45,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 04:04:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-10-29 04:04:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 04:04:45,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:45,559 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:45,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 04:04:45,559 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:45,560 INFO L82 PathProgramCache]: Analyzing trace with hash 90191008, now seen corresponding path program 1 times [2020-10-29 04:04:45,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:45,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031752552] [2020-10-29 04:04:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:45,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:45,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:45,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:46,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:46,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:48,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:48,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 04:04:48,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 04:04:48,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2945 [2020-10-29 04:04:48,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:48,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 04:04:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 04:04:48,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:49,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:49,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:49,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:49,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:49,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:49,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:04:49,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:49,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:49,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:49,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:49,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:49,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:04:49,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031752552] [2020-10-29 04:04:49,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:49,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 04:04:49,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972493388] [2020-10-29 04:04:49,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 04:04:49,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:49,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 04:04:49,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:04:49,368 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 16 states. [2020-10-29 04:04:50,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:50,697 INFO L93 Difference]: Finished difference Result 146 states and 191 transitions. [2020-10-29 04:04:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 04:04:50,698 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-10-29 04:04:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:50,699 INFO L225 Difference]: With dead ends: 146 [2020-10-29 04:04:50,699 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 04:04:50,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2020-10-29 04:04:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 04:04:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 68. [2020-10-29 04:04:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 04:04:50,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 91 transitions. [2020-10-29 04:04:50,715 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 91 transitions. Word has length 29 [2020-10-29 04:04:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:50,715 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 91 transitions. [2020-10-29 04:04:50,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 04:04:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 91 transitions. [2020-10-29 04:04:50,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 04:04:50,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:50,717 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:50,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 04:04:50,717 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:50,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:50,718 INFO L82 PathProgramCache]: Analyzing trace with hash -727457442, now seen corresponding path program 1 times [2020-10-29 04:04:50,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:50,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617805204] [2020-10-29 04:04:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:50,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:50,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:50,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:51,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:51,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:52,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:52,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 04:04:52,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 04:04:52,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1829 [2020-10-29 04:04:52,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:52,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:52,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 04:04:52,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:52,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 04:04:52,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:53,227 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-29 04:04:53,438 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-29 04:04:53,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:53,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:53,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:53,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:53,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:53,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 04:04:53,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:53,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:53,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:53,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:53,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:53,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:04:53,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617805204] [2020-10-29 04:04:53,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:53,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 04:04:53,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230113707] [2020-10-29 04:04:53,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 04:04:53,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:53,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 04:04:53,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-29 04:04:53,655 INFO L87 Difference]: Start difference. First operand 68 states and 91 transitions. Second operand 14 states. [2020-10-29 04:04:54,028 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-29 04:04:54,433 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-29 04:04:55,407 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-29 04:04:56,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:04:56,014 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2020-10-29 04:04:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 04:04:56,015 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-29 04:04:56,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:04:56,016 INFO L225 Difference]: With dead ends: 108 [2020-10-29 04:04:56,016 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 04:04:56,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2020-10-29 04:04:56,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 04:04:56,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-10-29 04:04:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 04:04:56,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2020-10-29 04:04:56,050 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 29 [2020-10-29 04:04:56,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:04:56,050 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2020-10-29 04:04:56,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 04:04:56,051 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2020-10-29 04:04:56,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 04:04:56,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:04:56,055 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:04:56,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 04:04:56,055 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:04:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:04:56,056 INFO L82 PathProgramCache]: Analyzing trace with hash 977405987, now seen corresponding path program 1 times [2020-10-29 04:04:56,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:04:56,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278709233] [2020-10-29 04:04:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:04:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:56,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:56,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:56,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:56,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:56,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:56,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:57,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:59,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:59,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 04:04:59,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:04:59,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3307 [2020-10-29 04:04:59,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:59,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:59,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 04:04:59,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:04:59,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 04:04:59,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:59,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:04:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:04:59,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:04:59,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:04:59,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:04:59,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:04:59,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 04:04:59,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:04:59,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:04:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:04:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:04:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:04:59,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:04:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 04:04:59,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278709233] [2020-10-29 04:04:59,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:04:59,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 04:04:59,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657783382] [2020-10-29 04:04:59,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 04:04:59,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:04:59,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 04:04:59,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 04:04:59,693 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand 7 states. [2020-10-29 04:05:00,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:05:00,040 INFO L93 Difference]: Finished difference Result 98 states and 124 transitions. [2020-10-29 04:05:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 04:05:00,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-29 04:05:00,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:05:00,042 INFO L225 Difference]: With dead ends: 98 [2020-10-29 04:05:00,042 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 04:05:00,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-29 04:05:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 04:05:00,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-29 04:05:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 04:05:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2020-10-29 04:05:00,055 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 30 [2020-10-29 04:05:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:05:00,056 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2020-10-29 04:05:00,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 04:05:00,056 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2020-10-29 04:05:00,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 04:05:00,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:05:00,057 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:05:00,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 04:05:00,058 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:05:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:05:00,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1035647932, now seen corresponding path program 1 times [2020-10-29 04:05:00,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:05:00,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414946521] [2020-10-29 04:05:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:05:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:05:00,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:00,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:00,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:00,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:00,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:00,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:00,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:00,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:05,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:05:05,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 04:05:05,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 04:05:05,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 04:05:05,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:05:05,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:05:05,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 04:05:05,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:05:05,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 04:05:05,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:05:05,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:05:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:05:05,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:05,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:05:05,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:05:05,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:05:05,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 04:05:05,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:05:05,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:05:05,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:05:05,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:05:05,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:05:05,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:05:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:05:05,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414946521] [2020-10-29 04:05:05,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:05:05,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 04:05:05,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015687018] [2020-10-29 04:05:05,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 04:05:05,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:05:05,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 04:05:05,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-29 04:05:05,559 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand 11 states. [2020-10-29 04:05:05,793 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-10-29 04:05:06,110 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-29 04:05:06,518 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-29 04:05:07,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:05:07,164 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2020-10-29 04:05:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 04:05:07,165 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-29 04:05:07,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:05:07,166 INFO L225 Difference]: With dead ends: 93 [2020-10-29 04:05:07,166 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 04:05:07,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:05:07,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 04:05:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-10-29 04:05:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 04:05:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2020-10-29 04:05:07,178 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 31 [2020-10-29 04:05:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:05:07,178 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2020-10-29 04:05:07,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 04:05:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2020-10-29 04:05:07,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 04:05:07,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:05:07,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:05:07,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 04:05:07,180 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:05:07,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:05:07,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1516764791, now seen corresponding path program 1 times [2020-10-29 04:05:07,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:05:07,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506438211] [2020-10-29 04:05:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:05:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:05:07,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:07,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:07,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:07,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:07,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:08,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:08,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:09,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:05:09,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 04:05:09,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:05:09,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1950 [2020-10-29 04:05:09,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:05:09,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:05:09,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 04:05:09,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 04:05:09,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 04:05:09,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:05:09,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:05:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:05:09,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:09,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:05:09,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:05:09,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:05:09,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 04:05:09,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:05:09,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:05:09,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:05:09,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:05:09,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:05:09,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:05:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:05:09,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506438211] [2020-10-29 04:05:09,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:05:09,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 04:05:09,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845649290] [2020-10-29 04:05:09,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 04:05:09,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:05:09,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 04:05:09,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 04:05:09,345 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand 10 states. [2020-10-29 04:05:09,561 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-29 04:05:10,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:05:10,292 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2020-10-29 04:05:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 04:05:10,293 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-29 04:05:10,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:05:10,294 INFO L225 Difference]: With dead ends: 154 [2020-10-29 04:05:10,295 INFO L226 Difference]: Without dead ends: 125 [2020-10-29 04:05:10,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-29 04:05:10,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-29 04:05:10,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 73. [2020-10-29 04:05:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 04:05:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-29 04:05:10,308 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 31 [2020-10-29 04:05:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:05:10,308 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-29 04:05:10,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 04:05:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-29 04:05:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 04:05:10,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:05:10,310 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:05:10,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 04:05:10,310 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:05:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:05:10,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1215842430, now seen corresponding path program 1 times [2020-10-29 04:05:10,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:05:10,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133897878] [2020-10-29 04:05:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:05:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:05:10,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:10,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:10,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:10,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:10,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:11,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:11,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:11,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:11,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:11,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:12,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:13,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:14,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:14,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:15,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:05:15,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 04:05:15,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 04:05:15,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 04:05:15,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:05:15,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:05:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 04:05:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:05:15,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 04:05:15,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:05:15,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:05:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:05:15,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:15,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:05:15,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:05:15,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:05:15,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 04:05:15,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:05:15,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:05:15,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:05:15,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:05:15,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:05:15,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:05:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:05:15,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133897878] [2020-10-29 04:05:15,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:05:15,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 04:05:15,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072051627] [2020-10-29 04:05:15,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 04:05:15,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:05:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 04:05:15,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-29 04:05:15,928 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 14 states. [2020-10-29 04:05:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:05:17,520 INFO L93 Difference]: Finished difference Result 135 states and 169 transitions. [2020-10-29 04:05:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 04:05:17,521 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-29 04:05:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:05:17,522 INFO L225 Difference]: With dead ends: 135 [2020-10-29 04:05:17,522 INFO L226 Difference]: Without dead ends: 131 [2020-10-29 04:05:17,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2020-10-29 04:05:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-29 04:05:17,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 89. [2020-10-29 04:05:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 04:05:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-10-29 04:05:17,542 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 32 [2020-10-29 04:05:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:05:17,543 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-10-29 04:05:17,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 04:05:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-10-29 04:05:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 04:05:17,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:05:17,544 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:05:17,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 04:05:17,544 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:05:17,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:05:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1084980160, now seen corresponding path program 1 times [2020-10-29 04:05:17,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:05:17,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533942106] [2020-10-29 04:05:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:05:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:05:17,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:17,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:17,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:17,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:17,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:18,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:18,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:05:18,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 04:05:18,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:05:18,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1178 [2020-10-29 04:05:18,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:05:18,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:05:18,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 04:05:18,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:05:18,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 04:05:18,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:05:19,216 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-10-29 04:05:19,435 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-29 04:05:19,672 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-29 04:05:20,287 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 105 [2020-10-29 04:05:20,828 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-10-29 04:05:21,393 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-29 04:05:21,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:05:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:05:21,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:21,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:05:21,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:05:21,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:05:21,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 04:05:21,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:05:21,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:05:21,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:05:21,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:05:21,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:05:21,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:05:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:05:21,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533942106] [2020-10-29 04:05:21,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:05:21,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 04:05:21,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008972726] [2020-10-29 04:05:21,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 04:05:21,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:05:21,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 04:05:21,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-29 04:05:21,629 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 13 states. [2020-10-29 04:05:22,484 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 78 [2020-10-29 04:05:23,327 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 92 [2020-10-29 04:05:23,847 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-10-29 04:05:25,314 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 112 [2020-10-29 04:05:26,760 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-29 04:05:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:05:27,798 INFO L93 Difference]: Finished difference Result 130 states and 161 transitions. [2020-10-29 04:05:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 04:05:27,800 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-29 04:05:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:05:27,801 INFO L225 Difference]: With dead ends: 130 [2020-10-29 04:05:27,801 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 04:05:27,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2020-10-29 04:05:27,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 04:05:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 70. [2020-10-29 04:05:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 04:05:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-10-29 04:05:27,816 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 32 [2020-10-29 04:05:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:05:27,816 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-10-29 04:05:27,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 04:05:27,816 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-10-29 04:05:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 04:05:27,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:05:27,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:05:27,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 04:05:27,817 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:05:27,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:05:27,818 INFO L82 PathProgramCache]: Analyzing trace with hash -197627798, now seen corresponding path program 2 times [2020-10-29 04:05:27,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:05:27,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323417840] [2020-10-29 04:05:27,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:05:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:05:27,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:27,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:27,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:28,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:28,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:29,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:29,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:30,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:31,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:05:31,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 04:05:31,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 04:05:31,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3840 [2020-10-29 04:05:31,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:05:31,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:05:31,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 04:05:31,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:05:31,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 04:05:31,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:05:32,192 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-29 04:05:32,503 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-10-29 04:05:32,813 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-10-29 04:05:33,116 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 68 [2020-10-29 04:05:33,443 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2020-10-29 04:05:33,950 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-29 04:05:34,590 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 76 [2020-10-29 04:05:35,087 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2020-10-29 04:05:35,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:05:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:05:35,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:35,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:05:35,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:05:35,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:05:35,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 04:05:35,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:05:35,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:05:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:05:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:05:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:05:35,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:05:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:05:35,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323417840] [2020-10-29 04:05:35,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:05:35,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 04:05:35,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363502342] [2020-10-29 04:05:35,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 04:05:35,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:05:35,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 04:05:35,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-29 04:05:35,361 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 16 states. [2020-10-29 04:05:36,120 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-29 04:05:36,505 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-29 04:05:37,118 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 70 [2020-10-29 04:05:37,871 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-10-29 04:05:38,318 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2020-10-29 04:05:38,756 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-29 04:05:39,157 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-29 04:05:39,989 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-29 04:05:40,796 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2020-10-29 04:05:41,348 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-29 04:05:42,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:05:42,068 INFO L93 Difference]: Finished difference Result 142 states and 184 transitions. [2020-10-29 04:05:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 04:05:42,069 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-29 04:05:42,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:05:42,070 INFO L225 Difference]: With dead ends: 142 [2020-10-29 04:05:42,070 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 04:05:42,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2020-10-29 04:05:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 04:05:42,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 81. [2020-10-29 04:05:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 04:05:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-10-29 04:05:42,089 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 33 [2020-10-29 04:05:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:05:42,089 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-10-29 04:05:42,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 04:05:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-10-29 04:05:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 04:05:42,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:05:42,090 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:05:42,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 04:05:42,090 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:05:42,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:05:42,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1477491476, now seen corresponding path program 2 times [2020-10-29 04:05:42,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:05:42,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597597270] [2020-10-29 04:05:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:05:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:05:42,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:42,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:42,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:42,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:43,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:43,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:43,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:43,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:44,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:46,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:05:46,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 04:05:46,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 04:05:46,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4507 [2020-10-29 04:05:46,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:05:46,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:05:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 04:05:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:05:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 04:05:46,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:05:46,937 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2020-10-29 04:05:47,118 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-10-29 04:05:47,292 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2020-10-29 04:05:47,450 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-29 04:05:47,578 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-10-29 04:05:48,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:05:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:05:48,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:48,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:05:48,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:05:48,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:05:48,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:05:48,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:05:48,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:05:48,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:05:48,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:05:48,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:05:48,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:05:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:05:48,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597597270] [2020-10-29 04:05:48,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:05:48,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 04:05:48,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515369420] [2020-10-29 04:05:48,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 04:05:48,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:05:48,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 04:05:48,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-29 04:05:48,141 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 18 states. [2020-10-29 04:05:48,891 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-29 04:05:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:05:50,750 INFO L93 Difference]: Finished difference Result 150 states and 193 transitions. [2020-10-29 04:05:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 04:05:50,751 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-29 04:05:50,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:05:50,753 INFO L225 Difference]: With dead ends: 150 [2020-10-29 04:05:50,753 INFO L226 Difference]: Without dead ends: 146 [2020-10-29 04:05:50,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 04:05:50,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-29 04:05:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 109. [2020-10-29 04:05:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-29 04:05:50,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2020-10-29 04:05:50,776 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 33 [2020-10-29 04:05:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:05:50,776 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2020-10-29 04:05:50,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 04:05:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2020-10-29 04:05:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 04:05:50,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:05:50,777 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:05:50,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 04:05:50,778 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:05:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:05:50,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1015276248, now seen corresponding path program 3 times [2020-10-29 04:05:50,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:05:50,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288985670] [2020-10-29 04:05:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:05:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:05:50,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:50,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:50,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:51,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:51,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:51,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:51,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:51,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:51,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:52,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:53,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:05:55,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:05:55,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 04:05:55,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 04:05:55,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4246 [2020-10-29 04:05:55,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:05:55,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:05:55,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 04:05:55,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:05:55,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 04:05:55,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:05:56,043 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-29 04:05:56,433 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-10-29 04:05:57,484 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-29 04:05:59,155 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 89 [2020-10-29 04:06:00,346 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 83 [2020-10-29 04:06:00,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:06:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:06:00,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:00,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:06:00,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:06:00,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:06:00,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 04:06:00,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:06:00,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:06:00,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:06:00,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:06:00,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:06:00,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:06:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:06:00,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288985670] [2020-10-29 04:06:00,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:06:00,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 04:06:00,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720874416] [2020-10-29 04:06:00,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 04:06:00,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:06:00,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 04:06:00,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-29 04:06:00,640 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand 15 states. [2020-10-29 04:06:00,924 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-29 04:06:01,584 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2020-10-29 04:06:02,181 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 52 [2020-10-29 04:06:02,663 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-29 04:06:03,740 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 82 [2020-10-29 04:06:04,479 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2020-10-29 04:06:06,196 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-29 04:06:07,489 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-29 04:06:11,622 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 108 DAG size of output: 102 [2020-10-29 04:06:16,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:06:16,461 INFO L93 Difference]: Finished difference Result 184 states and 245 transitions. [2020-10-29 04:06:16,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 04:06:16,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-29 04:06:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:06:16,466 INFO L225 Difference]: With dead ends: 184 [2020-10-29 04:06:16,466 INFO L226 Difference]: Without dead ends: 163 [2020-10-29 04:06:16,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2020-10-29 04:06:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-29 04:06:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2020-10-29 04:06:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-29 04:06:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 154 transitions. [2020-10-29 04:06:16,486 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 154 transitions. Word has length 33 [2020-10-29 04:06:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:06:16,486 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 154 transitions. [2020-10-29 04:06:16,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 04:06:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 154 transitions. [2020-10-29 04:06:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 04:06:16,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:06:16,487 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:06:16,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 04:06:16,487 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:06:16,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:06:16,488 INFO L82 PathProgramCache]: Analyzing trace with hash -186248659, now seen corresponding path program 4 times [2020-10-29 04:06:16,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:06:16,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031209656] [2020-10-29 04:06:16,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:06:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:06:16,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:16,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:16,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:16,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:17,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:18,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:18,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:20,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:06:20,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 04:06:20,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:06:20,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3805 [2020-10-29 04:06:20,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:06:20,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:06:20,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 04:06:20,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:06:20,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 04:06:20,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:06:20,718 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2020-10-29 04:06:20,941 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-29 04:06:21,153 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2020-10-29 04:06:21,417 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-10-29 04:06:21,761 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2020-10-29 04:06:21,954 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2020-10-29 04:06:22,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:06:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:06:22,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:22,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:06:22,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:06:22,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:06:22,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 04:06:22,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:06:22,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:06:22,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:06:22,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:06:22,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:06:22,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:06:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:06:22,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031209656] [2020-10-29 04:06:22,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:06:22,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 04:06:22,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107365674] [2020-10-29 04:06:22,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 04:06:22,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:06:22,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 04:06:22,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-29 04:06:22,287 INFO L87 Difference]: Start difference. First operand 114 states and 154 transitions. Second operand 19 states. [2020-10-29 04:06:22,999 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-29 04:06:23,207 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-29 04:06:23,400 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-29 04:06:23,578 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-29 04:06:23,880 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-29 04:06:24,160 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-29 04:06:24,370 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-29 04:06:24,588 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-29 04:06:25,019 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-29 04:06:25,818 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-29 04:06:26,035 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-29 04:06:27,318 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-29 04:06:27,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:06:27,505 INFO L93 Difference]: Finished difference Result 203 states and 261 transitions. [2020-10-29 04:06:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 04:06:27,507 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-10-29 04:06:27,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:06:27,510 INFO L225 Difference]: With dead ends: 203 [2020-10-29 04:06:27,510 INFO L226 Difference]: Without dead ends: 199 [2020-10-29 04:06:27,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=353, Invalid=1999, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 04:06:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-29 04:06:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 118. [2020-10-29 04:06:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-29 04:06:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 160 transitions. [2020-10-29 04:06:27,537 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 160 transitions. Word has length 34 [2020-10-29 04:06:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:06:27,537 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 160 transitions. [2020-10-29 04:06:27,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 04:06:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 160 transitions. [2020-10-29 04:06:27,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 04:06:27,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:06:27,538 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:06:27,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 04:06:27,539 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:06:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:06:27,539 INFO L82 PathProgramCache]: Analyzing trace with hash -45700049, now seen corresponding path program 1 times [2020-10-29 04:06:27,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:06:27,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565318411] [2020-10-29 04:06:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:06:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:06:27,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:27,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:27,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:27,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:28,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:28,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:30,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:06:30,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 04:06:30,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 04:06:30,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2656 [2020-10-29 04:06:30,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:06:30,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:06:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 04:06:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:06:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 04:06:30,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:06:30,628 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2020-10-29 04:06:30,810 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-29 04:06:31,068 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2020-10-29 04:06:31,327 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-29 04:06:31,586 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-29 04:06:31,855 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-29 04:06:32,130 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-29 04:06:32,423 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-29 04:06:32,666 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-29 04:06:32,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:06:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:06:32,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:32,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:06:32,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:06:32,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:06:32,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:06:32,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:06:32,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:06:32,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:06:32,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:06:32,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:06:32,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:06:32,949 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:06:32,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565318411] [2020-10-29 04:06:32,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:06:32,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 04:06:32,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081595104] [2020-10-29 04:06:32,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 04:06:32,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:06:32,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 04:06:32,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-29 04:06:32,951 INFO L87 Difference]: Start difference. First operand 118 states and 160 transitions. Second operand 17 states. [2020-10-29 04:06:33,429 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 58 [2020-10-29 04:06:34,197 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-10-29 04:06:35,087 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2020-10-29 04:06:35,554 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-29 04:06:35,873 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-29 04:06:36,417 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-29 04:06:36,608 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-29 04:06:37,855 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-29 04:06:38,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:06:38,999 INFO L93 Difference]: Finished difference Result 253 states and 338 transitions. [2020-10-29 04:06:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 04:06:39,000 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-29 04:06:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:06:39,002 INFO L225 Difference]: With dead ends: 253 [2020-10-29 04:06:39,002 INFO L226 Difference]: Without dead ends: 211 [2020-10-29 04:06:39,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 04:06:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-29 04:06:39,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 122. [2020-10-29 04:06:39,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 04:06:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 165 transitions. [2020-10-29 04:06:39,026 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 165 transitions. Word has length 34 [2020-10-29 04:06:39,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:06:39,026 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 165 transitions. [2020-10-29 04:06:39,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 04:06:39,026 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 165 transitions. [2020-10-29 04:06:39,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 04:06:39,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:06:39,027 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:06:39,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 04:06:39,027 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:06:39,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:06:39,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2094348798, now seen corresponding path program 2 times [2020-10-29 04:06:39,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:06:39,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377342534] [2020-10-29 04:06:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:06:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:06:39,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:39,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:39,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:39,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:39,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:39,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:39,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:39,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:40,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:41,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:06:41,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 04:06:41,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 04:06:41,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2773 [2020-10-29 04:06:41,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:06:41,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:06:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 04:06:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:06:41,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 04:06:41,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:06:42,262 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-29 04:06:42,466 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-29 04:06:42,774 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-29 04:06:43,204 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-29 04:06:43,695 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-29 04:06:43,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:06:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:06:43,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:43,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:06:43,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:06:43,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:06:43,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:06:43,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:06:43,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:06:43,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:06:43,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:06:43,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:06:43,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:06:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:06:43,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377342534] [2020-10-29 04:06:43,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:06:43,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 04:06:43,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664074168] [2020-10-29 04:06:43,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 04:06:43,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:06:43,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 04:06:43,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-29 04:06:43,961 INFO L87 Difference]: Start difference. First operand 122 states and 165 transitions. Second operand 13 states. [2020-10-29 04:06:45,354 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-10-29 04:06:46,731 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 111 DAG size of output: 77 [2020-10-29 04:06:50,128 WARN L193 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 103 DAG size of output: 84 [2020-10-29 04:06:51,052 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-29 04:06:51,673 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-29 04:06:52,594 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-29 04:06:53,332 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-29 04:06:54,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:06:54,034 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-10-29 04:06:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 04:06:54,036 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-29 04:06:54,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:06:54,037 INFO L225 Difference]: With dead ends: 170 [2020-10-29 04:06:54,038 INFO L226 Difference]: Without dead ends: 142 [2020-10-29 04:06:54,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-29 04:06:54,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-29 04:06:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 128. [2020-10-29 04:06:54,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-29 04:06:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 169 transitions. [2020-10-29 04:06:54,066 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 169 transitions. Word has length 35 [2020-10-29 04:06:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:06:54,067 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 169 transitions. [2020-10-29 04:06:54,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 04:06:54,067 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 169 transitions. [2020-10-29 04:06:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 04:06:54,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:06:54,068 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:06:54,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 04:06:54,068 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:06:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:06:54,069 INFO L82 PathProgramCache]: Analyzing trace with hash -140338037, now seen corresponding path program 2 times [2020-10-29 04:06:54,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:06:54,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499521699] [2020-10-29 04:06:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:06:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:06:54,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:54,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:54,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:54,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:54,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:54,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:54,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:54,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:54,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:55,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:55,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:55,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:55,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:56,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:56,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:56,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:56,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:56,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:57,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:57,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:57,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:06:59,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:06:59,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 04:06:59,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-29 04:06:59,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 04:06:59,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:06:59,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:06:59,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 04:06:59,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:06:59,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 04:06:59,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:06:59,589 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2020-10-29 04:06:59,908 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2020-10-29 04:07:00,091 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-10-29 04:07:00,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:07:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:07:00,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:00,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:07:00,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:07:00,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:07:00,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 04:07:00,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:07:00,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:07:00,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:07:00,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:07:00,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:07:00,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:07:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 04:07:00,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499521699] [2020-10-29 04:07:00,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:07:00,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 04:07:00,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972932025] [2020-10-29 04:07:00,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 04:07:00,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:07:00,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 04:07:00,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-29 04:07:00,382 INFO L87 Difference]: Start difference. First operand 128 states and 169 transitions. Second operand 12 states. [2020-10-29 04:07:00,974 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-29 04:07:01,146 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2020-10-29 04:07:01,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:07:01,967 INFO L93 Difference]: Finished difference Result 159 states and 205 transitions. [2020-10-29 04:07:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 04:07:01,969 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-29 04:07:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:07:01,970 INFO L225 Difference]: With dead ends: 159 [2020-10-29 04:07:01,970 INFO L226 Difference]: Without dead ends: 133 [2020-10-29 04:07:01,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-10-29 04:07:01,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-29 04:07:01,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 117. [2020-10-29 04:07:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-29 04:07:01,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 156 transitions. [2020-10-29 04:07:01,990 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 156 transitions. Word has length 36 [2020-10-29 04:07:01,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:07:01,990 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 156 transitions. [2020-10-29 04:07:01,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 04:07:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 156 transitions. [2020-10-29 04:07:01,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 04:07:01,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:07:01,991 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:07:01,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 04:07:01,991 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:07:01,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:07:01,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2043084682, now seen corresponding path program 3 times [2020-10-29 04:07:01,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:07:01,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109371151] [2020-10-29 04:07:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:07:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:07:02,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:02,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:02,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:02,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:02,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:02,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:02,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:03,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:03,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:05,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:07:05,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 04:07:05,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 04:07:05,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3229 [2020-10-29 04:07:05,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:07:05,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:07:05,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 04:07:05,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:07:05,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 04:07:05,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:07:06,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:07:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:07:06,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:06,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:07:06,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:07:06,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:07:06,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 04:07:06,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:07:06,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:07:06,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:07:06,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:07:06,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:07:06,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:07:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:07:06,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109371151] [2020-10-29 04:07:06,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:07:06,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 04:07:06,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158555939] [2020-10-29 04:07:06,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 04:07:06,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:07:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 04:07:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-29 04:07:06,126 INFO L87 Difference]: Start difference. First operand 117 states and 156 transitions. Second operand 14 states. [2020-10-29 04:07:06,612 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-29 04:07:08,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:07:08,667 INFO L93 Difference]: Finished difference Result 241 states and 318 transitions. [2020-10-29 04:07:08,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 04:07:08,670 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-29 04:07:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:07:08,672 INFO L225 Difference]: With dead ends: 241 [2020-10-29 04:07:08,672 INFO L226 Difference]: Without dead ends: 226 [2020-10-29 04:07:08,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2020-10-29 04:07:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-29 04:07:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 155. [2020-10-29 04:07:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-29 04:07:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 206 transitions. [2020-10-29 04:07:08,700 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 206 transitions. Word has length 36 [2020-10-29 04:07:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:07:08,700 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 206 transitions. [2020-10-29 04:07:08,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 04:07:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 206 transitions. [2020-10-29 04:07:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 04:07:08,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:07:08,701 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:07:08,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 04:07:08,701 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:07:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:07:08,702 INFO L82 PathProgramCache]: Analyzing trace with hash -884531919, now seen corresponding path program 3 times [2020-10-29 04:07:08,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:07:08,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905072305] [2020-10-29 04:07:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:07:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:07:08,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:08,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:08,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:09,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:09,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:09,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:09,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:09,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:10,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:10,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:11,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:11,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:12,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:12,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:13,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:13,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:07:13,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 04:07:13,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 04:07:13,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 04:07:13,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:07:13,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:07:13,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 04:07:13,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:07:13,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 04:07:13,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:07:14,201 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 21 [2020-10-29 04:07:14,394 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-10-29 04:07:14,576 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-10-29 04:07:15,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:07:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:07:15,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:15,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:07:15,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:07:15,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:07:15,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 04:07:15,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:07:15,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:07:15,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:07:15,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:07:15,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:07:15,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:07:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:07:15,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905072305] [2020-10-29 04:07:15,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 04:07:15,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 04:07:15,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591794455] [2020-10-29 04:07:15,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 04:07:15,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:07:15,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 04:07:15,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-29 04:07:15,243 INFO L87 Difference]: Start difference. First operand 155 states and 206 transitions. Second operand 18 states. [2020-10-29 04:07:18,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:07:18,192 INFO L93 Difference]: Finished difference Result 245 states and 320 transitions. [2020-10-29 04:07:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 04:07:18,194 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-29 04:07:18,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:07:18,197 INFO L225 Difference]: With dead ends: 245 [2020-10-29 04:07:18,197 INFO L226 Difference]: Without dead ends: 241 [2020-10-29 04:07:18,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 04:07:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-29 04:07:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 180. [2020-10-29 04:07:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 04:07:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 239 transitions. [2020-10-29 04:07:18,236 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 239 transitions. Word has length 37 [2020-10-29 04:07:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:07:18,237 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 239 transitions. [2020-10-29 04:07:18,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 04:07:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 239 transitions. [2020-10-29 04:07:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 04:07:18,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:07:18,238 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:07:18,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 04:07:18,238 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:07:18,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:07:18,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1604997043, now seen corresponding path program 2 times [2020-10-29 04:07:18,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:07:18,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191883588] [2020-10-29 04:07:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:07:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:07:18,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:18,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:18,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:18,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:18,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:18,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:19,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:07:20,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:07:20,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 04:07:20,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 04:07:20,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2370 [2020-10-29 04:07:20,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:07:20,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:07:20,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 04:07:20,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 04:07:20,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 04:07:20,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 04:07:35,337 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-29 04:07:36,184 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-10-29 04:07:37,027 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-10-29 04:07:38,393 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-29 04:07:41,659 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 145 DAG size of output: 111 [2020-10-29 04:07:44,391 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 130 DAG size of output: 103