/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=DEEPEST --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/eca-rers2012/Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 17:38:28,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 17:38:28,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 17:38:28,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 17:38:28,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 17:38:28,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 17:38:28,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 17:38:28,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 17:38:28,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 17:38:28,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 17:38:28,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 17:38:28,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 17:38:28,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 17:38:28,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 17:38:28,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 17:38:28,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 17:38:28,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 17:38:28,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 17:38:28,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 17:38:28,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 17:38:28,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 17:38:28,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 17:38:28,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 17:38:28,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 17:38:28,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 17:38:28,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 17:38:28,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 17:38:28,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 17:38:28,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 17:38:28,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 17:38:28,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 17:38:28,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 17:38:28,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 17:38:28,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 17:38:28,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 17:38:28,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 17:38:28,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 17:38:28,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 17:38:28,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 17:38:28,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 17:38:28,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 17:38:28,998 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 [2020-10-27 17:38:29,075 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 17:38:29,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 17:38:29,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 17:38:29,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 17:38:29,081 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 17:38:29,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 17:38:29,081 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 17:38:29,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 17:38:29,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 17:38:29,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 17:38:29,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 17:38:29,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 17:38:29,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 17:38:29,083 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 17:38:29,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 17:38:29,083 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 17:38:29,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 17:38:29,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 17:38:29,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 17:38:29,084 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 17:38:29,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 17:38:29,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 17:38:29,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 17:38:29,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 17:38:29,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 17:38:29,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 17:38:29,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 17:38:29,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 17:38:29,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 17:38:29,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 17:38:29,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 17:38:29,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 17:38:29,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 17:38:29,506 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 17:38:29,507 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 17:38:29,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label05.c [2020-10-27 17:38:29,596 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26d80e369/184eff0358ea45f98980d6ee3d5d91c5/FLAG837413874 [2020-10-27 17:38:30,605 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 17:38:30,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label05.c [2020-10-27 17:38:30,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26d80e369/184eff0358ea45f98980d6ee3d5d91c5/FLAG837413874 [2020-10-27 17:38:31,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26d80e369/184eff0358ea45f98980d6ee3d5d91c5 [2020-10-27 17:38:31,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 17:38:31,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 17:38:31,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 17:38:31,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 17:38:31,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 17:38:31,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:38:31" (1/1) ... [2020-10-27 17:38:31,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72fe7e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:31, skipping insertion in model container [2020-10-27 17:38:31,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:38:31" (1/1) ... [2020-10-27 17:38:31,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 17:38:31,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 17:38:32,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:38:32,842 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 17:38:33,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:38:33,568 INFO L208 MainTranslator]: Completed translation [2020-10-27 17:38:33,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:33 WrapperNode [2020-10-27 17:38:33,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 17:38:33,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 17:38:33,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 17:38:33,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 17:38:33,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:33" (1/1) ... [2020-10-27 17:38:33,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:33" (1/1) ... [2020-10-27 17:38:33,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:33" (1/1) ... [2020-10-27 17:38:33,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:33" (1/1) ... [2020-10-27 17:38:33,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:33" (1/1) ... [2020-10-27 17:38:33,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:33" (1/1) ... [2020-10-27 17:38:33,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:33" (1/1) ... [2020-10-27 17:38:33,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 17:38:33,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 17:38:33,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 17:38:33,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 17:38:33,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:33" (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 [2020-10-27 17:38:33,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 17:38:33,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 17:38:33,985 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 17:38:33,985 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 17:38:33,985 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 17:38:33,985 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 17:38:33,985 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 17:38:33,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 17:38:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 17:38:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 17:38:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 17:38:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 17:38:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 17:38:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 17:38:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 17:38:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 17:38:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 17:38:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 17:38:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 17:38:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 17:38:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 17:38:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 17:38:33,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 17:38:33,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 17:38:33,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 17:38:39,571 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 17:38:39,572 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 17:38:39,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:38:39 BoogieIcfgContainer [2020-10-27 17:38:39,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 17:38:39,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 17:38:39,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 17:38:39,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 17:38:39,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:38:31" (1/3) ... [2020-10-27 17:38:39,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d49f436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:38:39, skipping insertion in model container [2020-10-27 17:38:39,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:33" (2/3) ... [2020-10-27 17:38:39,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d49f436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:38:39, skipping insertion in model container [2020-10-27 17:38:39,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:38:39" (3/3) ... [2020-10-27 17:38:39,584 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label05.c [2020-10-27 17:38:39,596 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 17:38:39,602 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 17:38:39,616 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 17:38:39,650 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 17:38:39,650 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 17:38:39,650 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 17:38:39,650 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 17:38:39,650 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 17:38:39,650 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 17:38:39,651 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 17:38:39,651 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 17:38:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-27 17:38:39,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 17:38:39,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:38:39,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:38:39,697 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:38:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:38:39,703 INFO L82 PathProgramCache]: Analyzing trace with hash -947553692, now seen corresponding path program 1 times [2020-10-27 17:38:39,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:38:39,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767563837] [2020-10-27 17:38:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:38:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:39,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:40,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:40,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 17:38:40,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:40,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-27 17:38:40,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:40,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 17:38:40,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 17:38:40,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 17:38:40,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:38:40,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:38:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:40,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:40,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:40,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:38:40,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:40,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 17:38:40,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:40,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:38:40,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:40,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:38:40,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:38:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:38:40,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767563837] [2020-10-27 17:38:40,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 17:38:40,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 17:38:40,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462136223] [2020-10-27 17:38:40,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:38:40,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:38:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:38:40,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:38:40,890 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 5 states. [2020-10-27 17:38:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:38:52,916 INFO L93 Difference]: Finished difference Result 2476 states and 4742 transitions. [2020-10-27 17:38:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:38:52,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-27 17:38:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:38:52,951 INFO L225 Difference]: With dead ends: 2476 [2020-10-27 17:38:52,951 INFO L226 Difference]: Without dead ends: 1569 [2020-10-27 17:38:52,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:38:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-27 17:38:53,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-27 17:38:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-27 17:38:53,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2864 transitions. [2020-10-27 17:38:53,138 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2864 transitions. Word has length 66 [2020-10-27 17:38:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:38:53,139 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2864 transitions. [2020-10-27 17:38:53,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:38:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2864 transitions. [2020-10-27 17:38:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 17:38:53,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:38:53,147 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:38:53,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 17:38:53,148 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:38:53,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:38:53,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1678769650, now seen corresponding path program 1 times [2020-10-27 17:38:53,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:38:53,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483138679] [2020-10-27 17:38:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:38:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:53,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:53,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:54,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:54,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:54,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 17:38:54,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:38:54,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-27 17:38:54,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:54,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:38:54,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 17:38:54,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 17:38:54,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:38:54,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:38:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:54,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:54,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:54,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:38:54,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:54,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 17:38:54,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:54,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:38:54,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:54,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:38:54,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 17:38:54,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:38:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:38:54,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:38:54,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:38:54,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 17:38:54,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:38:54,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-27 17:38:54,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:38:54,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:38:54,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:38:54,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 17:38:54,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:38:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:38:54,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483138679] [2020-10-27 17:38:54,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:38:54,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:38:54,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878095872] [2020-10-27 17:38:54,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:38:54,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:38:54,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:38:54,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:38:54,850 INFO L87 Difference]: Start difference. First operand 1554 states and 2864 transitions. Second operand 5 states. [2020-10-27 17:39:09,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:39:09,726 INFO L93 Difference]: Finished difference Result 4677 states and 8688 transitions. [2020-10-27 17:39:09,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:39:09,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-10-27 17:39:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:39:09,750 INFO L225 Difference]: With dead ends: 4677 [2020-10-27 17:39:09,750 INFO L226 Difference]: Without dead ends: 3129 [2020-10-27 17:39:09,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:39:09,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2020-10-27 17:39:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3110. [2020-10-27 17:39:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3110 states. [2020-10-27 17:39:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 5113 transitions. [2020-10-27 17:39:09,872 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 5113 transitions. Word has length 135 [2020-10-27 17:39:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:39:09,874 INFO L481 AbstractCegarLoop]: Abstraction has 3110 states and 5113 transitions. [2020-10-27 17:39:09,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:39:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 5113 transitions. [2020-10-27 17:39:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 17:39:09,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:39:09,885 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:39:09,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 17:39:09,886 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:39:09,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:39:09,887 INFO L82 PathProgramCache]: Analyzing trace with hash 832911864, now seen corresponding path program 1 times [2020-10-27 17:39:09,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:39:09,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683318274] [2020-10-27 17:39:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:39:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:09,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:10,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:10,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:11,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:11,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:11,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 17:39:11,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:39:11,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1639 [2020-10-27 17:39:11,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:11,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:39:11,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 17:39:11,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 17:39:11,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:11,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:39:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:11,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:11,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:11,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:39:11,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:11,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 17:39:11,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:11,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:11,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:39:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:11,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:11,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:11,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 17:39:11,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:11,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 17:39:11,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:11,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:39:11,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:11,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 17:39:11,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:39:11,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683318274] [2020-10-27 17:39:11,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:39:11,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:39:11,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366173132] [2020-10-27 17:39:11,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:39:11,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:39:11,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:39:11,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:39:11,936 INFO L87 Difference]: Start difference. First operand 3110 states and 5113 transitions. Second operand 5 states. [2020-10-27 17:39:24,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:39:24,615 INFO L93 Difference]: Finished difference Result 9341 states and 15567 transitions. [2020-10-27 17:39:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:39:24,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2020-10-27 17:39:24,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:39:24,662 INFO L225 Difference]: With dead ends: 9341 [2020-10-27 17:39:24,662 INFO L226 Difference]: Without dead ends: 6237 [2020-10-27 17:39:24,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:39:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2020-10-27 17:39:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 6233. [2020-10-27 17:39:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6233 states. [2020-10-27 17:39:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6233 states to 6233 states and 9057 transitions. [2020-10-27 17:39:24,882 INFO L78 Accepts]: Start accepts. Automaton has 6233 states and 9057 transitions. Word has length 136 [2020-10-27 17:39:24,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:39:24,886 INFO L481 AbstractCegarLoop]: Abstraction has 6233 states and 9057 transitions. [2020-10-27 17:39:24,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:39:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 6233 states and 9057 transitions. [2020-10-27 17:39:24,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 17:39:24,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:39:24,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:39:24,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 17:39:24,897 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:39:24,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:39:24,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1443279252, now seen corresponding path program 1 times [2020-10-27 17:39:24,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:39:24,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694835166] [2020-10-27 17:39:24,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:39:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:24,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:25,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:25,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:25,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 17:39:25,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:39:25,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-10-27 17:39:25,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:25,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:39:25,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-27 17:39:25,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 17:39:25,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:25,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:39:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:25,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:25,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:25,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:39:25,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:25,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 17:39:25,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:25,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:25,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:25,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:25,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:25,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:39:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:25,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:25,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:25,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 17:39:25,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:25,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-27 17:39:25,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:25,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:39:25,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:25,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 17:39:25,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:39:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:39:26,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694835166] [2020-10-27 17:39:26,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:39:26,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:39:26,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729206663] [2020-10-27 17:39:26,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:39:26,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:39:26,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:39:26,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:39:26,058 INFO L87 Difference]: Start difference. First operand 6233 states and 9057 transitions. Second operand 5 states. [2020-10-27 17:39:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:39:38,574 INFO L93 Difference]: Finished difference Result 18670 states and 27728 transitions. [2020-10-27 17:39:38,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:39:38,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2020-10-27 17:39:38,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:39:38,659 INFO L225 Difference]: With dead ends: 18670 [2020-10-27 17:39:38,659 INFO L226 Difference]: Without dead ends: 12443 [2020-10-27 17:39:38,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 17:39:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12443 states. [2020-10-27 17:39:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12443 to 12439. [2020-10-27 17:39:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12439 states. [2020-10-27 17:39:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12439 states to 12439 states and 17981 transitions. [2020-10-27 17:39:39,158 INFO L78 Accepts]: Start accepts. Automaton has 12439 states and 17981 transitions. Word has length 154 [2020-10-27 17:39:39,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:39:39,158 INFO L481 AbstractCegarLoop]: Abstraction has 12439 states and 17981 transitions. [2020-10-27 17:39:39,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 17:39:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 12439 states and 17981 transitions. [2020-10-27 17:39:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-27 17:39:39,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:39:39,166 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:39:39,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 17:39:39,166 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:39:39,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:39:39,167 INFO L82 PathProgramCache]: Analyzing trace with hash 860809392, now seen corresponding path program 1 times [2020-10-27 17:39:39,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:39:39,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195998004] [2020-10-27 17:39:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:39:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:39,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:39,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:39,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:41,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:41,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-27 17:39:41,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:39:41,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2665 [2020-10-27 17:39:41,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:41,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:39:41,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 17:39:41,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 17:39:41,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:42,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:39:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:42,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:42,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:42,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:39:42,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:42,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 17:39:42,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:42,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:39:42,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:42,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:39:42,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:42,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:39:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:42,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:42,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:42,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 17:39:42,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:42,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 17:39:42,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:39:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:39:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 17:39:42,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:42,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-27 17:39:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:39:42,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:39:42,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:39:42,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 17:39:42,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:39:42,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-27 17:39:42,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:39:42,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:39:42,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:39:42,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 17:39:42,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:39:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 17:39:42,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195998004] [2020-10-27 17:39:42,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:39:42,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 17:39:42,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669535958] [2020-10-27 17:39:42,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:39:42,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:39:42,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:39:42,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:39:42,569 INFO L87 Difference]: Start difference. First operand 12439 states and 17981 transitions. Second operand 7 states. [2020-10-27 17:40:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:40:05,463 INFO L93 Difference]: Finished difference Result 35275 states and 53774 transitions. [2020-10-27 17:40:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 17:40:05,465 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2020-10-27 17:40:05,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:40:05,558 INFO L225 Difference]: With dead ends: 35275 [2020-10-27 17:40:05,558 INFO L226 Difference]: Without dead ends: 22842 [2020-10-27 17:40:05,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 17:40:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22842 states. [2020-10-27 17:40:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22842 to 21933. [2020-10-27 17:40:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21933 states. [2020-10-27 17:40:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21933 states to 21933 states and 30985 transitions. [2020-10-27 17:40:06,281 INFO L78 Accepts]: Start accepts. Automaton has 21933 states and 30985 transitions. Word has length 250 [2020-10-27 17:40:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:40:06,282 INFO L481 AbstractCegarLoop]: Abstraction has 21933 states and 30985 transitions. [2020-10-27 17:40:06,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 17:40:06,282 INFO L276 IsEmpty]: Start isEmpty. Operand 21933 states and 30985 transitions. [2020-10-27 17:40:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-27 17:40:06,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:40:06,295 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:40:06,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 17:40:06,296 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:40:06,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:40:06,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1051339472, now seen corresponding path program 1 times [2020-10-27 17:40:06,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:40:06,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693851824] [2020-10-27 17:40:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:40:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:06,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:06,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:08,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:08,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-27 17:40:08,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:40:08,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1812 [2020-10-27 17:40:08,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:08,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:40:08,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 17:40:08,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 17:40:08,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:40:08,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:40:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:08,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:08,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:08,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:40:08,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:08,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:40:08,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:08,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:40:08,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:40:08,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:40:08,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:08,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:40:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:08,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:08,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:08,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 17:40:08,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:08,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-27 17:40:08,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:08,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:40:08,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:40:08,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 17:40:08,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:08,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 17:40:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:08,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:08,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:08,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 17:40:08,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:08,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-27 17:40:08,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:08,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:40:08,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:40:08,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 17:40:08,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 200 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 17:40:09,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693851824] [2020-10-27 17:40:09,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:40:09,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 17:40:09,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849455400] [2020-10-27 17:40:09,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 17:40:09,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:40:09,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 17:40:09,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 17:40:09,008 INFO L87 Difference]: Start difference. First operand 21933 states and 30985 transitions. Second operand 8 states. [2020-10-27 17:40:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:40:35,806 INFO L93 Difference]: Finished difference Result 63016 states and 95495 transitions. [2020-10-27 17:40:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 17:40:35,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 250 [2020-10-27 17:40:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:40:36,038 INFO L225 Difference]: With dead ends: 63016 [2020-10-27 17:40:36,040 INFO L226 Difference]: Without dead ends: 41093 [2020-10-27 17:40:36,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-27 17:40:36,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41093 states. [2020-10-27 17:40:37,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41093 to 40121. [2020-10-27 17:40:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40121 states. [2020-10-27 17:40:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40121 states to 40121 states and 56557 transitions. [2020-10-27 17:40:37,686 INFO L78 Accepts]: Start accepts. Automaton has 40121 states and 56557 transitions. Word has length 250 [2020-10-27 17:40:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:40:37,687 INFO L481 AbstractCegarLoop]: Abstraction has 40121 states and 56557 transitions. [2020-10-27 17:40:37,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 17:40:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 40121 states and 56557 transitions. [2020-10-27 17:40:37,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-27 17:40:37,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:40:37,701 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:40:37,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 17:40:37,701 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:40:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:40:37,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2038300422, now seen corresponding path program 1 times [2020-10-27 17:40:37,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:40:37,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961481544] [2020-10-27 17:40:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:40:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:37,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:37,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:39,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:39,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:41,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:41,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-27 17:40:41,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 17:40:41,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3842 [2020-10-27 17:40:41,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:41,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:40:41,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-27 17:40:41,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 17:40:41,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:40:41,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:40:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:41,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:41,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:41,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:40:41,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:41,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 17:40:41,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:41,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:40:41,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:40:41,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:40:41,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:41,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:40:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:41,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:41,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:41,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 17:40:41,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:41,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-27 17:40:41,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:41,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:40:41,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:40:41,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 17:40:41,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:41,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-10-27 17:40:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:40:41,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:40:42,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:40:42,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 17:40:42,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:40:42,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-27 17:40:42,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:40:42,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:40:42,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:40:42,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 17:40:42,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:40:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 17:40:42,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961481544] [2020-10-27 17:40:42,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:40:42,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 17:40:42,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955861346] [2020-10-27 17:40:42,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 17:40:42,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:40:42,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 17:40:42,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 17:40:42,321 INFO L87 Difference]: Start difference. First operand 40121 states and 56557 transitions. Second operand 8 states. [2020-10-27 17:40:42,482 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 17:41:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:41:02,203 INFO L93 Difference]: Finished difference Result 97831 states and 144426 transitions. [2020-10-27 17:41:02,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 17:41:02,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 251 [2020-10-27 17:41:02,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:41:02,630 INFO L225 Difference]: With dead ends: 97831 [2020-10-27 17:41:02,631 INFO L226 Difference]: Without dead ends: 59257 [2020-10-27 17:41:02,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-27 17:41:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59257 states. [2020-10-27 17:41:04,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59257 to 52147. [2020-10-27 17:41:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52147 states. [2020-10-27 17:41:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52147 states to 52147 states and 70322 transitions. [2020-10-27 17:41:04,885 INFO L78 Accepts]: Start accepts. Automaton has 52147 states and 70322 transitions. Word has length 251 [2020-10-27 17:41:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:41:04,886 INFO L481 AbstractCegarLoop]: Abstraction has 52147 states and 70322 transitions. [2020-10-27 17:41:04,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 17:41:04,886 INFO L276 IsEmpty]: Start isEmpty. Operand 52147 states and 70322 transitions. [2020-10-27 17:41:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-27 17:41:04,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:41:04,900 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:41:04,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 17:41:04,900 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:41:04,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:41:04,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1225633020, now seen corresponding path program 1 times [2020-10-27 17:41:04,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:41:04,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327895108] [2020-10-27 17:41:04,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:41:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:41:04,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:41:05,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:41:06,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:41:07,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:41:07,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-27 17:41:07,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:41:07,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2902 [2020-10-27 17:41:07,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:41:07,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:41:07,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-27 17:41:07,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 17:41:07,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:41:08,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:41:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:41:08,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:41:08,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:41:08,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:41:08,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:41:08,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 17:41:08,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:41:08,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:41:08,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:41:08,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:41:08,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:41:08,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:41:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:41:08,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:41:08,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:41:08,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 17:41:08,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:41:08,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-27 17:41:08,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:41:08,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:41:08,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:41:08,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 17:41:08,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:41:08,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-27 17:41:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:41:08,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:41:08,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:41:08,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 17:41:08,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:41:08,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-27 17:41:08,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:41:08,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:41:08,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:41:08,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 17:41:08,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:41:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 17:41:08,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327895108] [2020-10-27 17:41:08,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:41:08,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 17:41:08,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944494581] [2020-10-27 17:41:08,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:41:08,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:41:08,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:41:08,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:41:08,620 INFO L87 Difference]: Start difference. First operand 52147 states and 70322 transitions. Second operand 7 states. [2020-10-27 17:41:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:41:40,527 INFO L93 Difference]: Finished difference Result 102327 states and 145531 transitions. [2020-10-27 17:41:40,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 17:41:40,534 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 256 [2020-10-27 17:41:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:41:40,882 INFO L225 Difference]: With dead ends: 102327 [2020-10-27 17:41:40,882 INFO L226 Difference]: Without dead ends: 62512 [2020-10-27 17:41:41,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 17:41:41,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62512 states. [2020-10-27 17:41:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62512 to 56981. [2020-10-27 17:41:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56981 states. [2020-10-27 17:41:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56981 states to 56981 states and 73259 transitions. [2020-10-27 17:41:43,222 INFO L78 Accepts]: Start accepts. Automaton has 56981 states and 73259 transitions. Word has length 256 [2020-10-27 17:41:43,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:41:43,223 INFO L481 AbstractCegarLoop]: Abstraction has 56981 states and 73259 transitions. [2020-10-27 17:41:43,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 17:41:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 56981 states and 73259 transitions. [2020-10-27 17:41:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-27 17:41:43,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:41:43,242 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:41:43,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 17:41:43,243 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:41:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:41:43,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2038967758, now seen corresponding path program 1 times [2020-10-27 17:41:43,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:41:43,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244395617] [2020-10-27 17:41:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:41:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:41:43,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:41:43,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:41:45,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:41:46,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:41:46,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-27 17:41:46,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 17:41:46,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3195 [2020-10-27 17:41:46,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:41:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:41:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 17:41:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-27 17:41:46,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:41:46,672 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 17:41:46,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:41:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:41:46,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:41:46,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:41:46,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:41:46,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:41:46,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 17:41:46,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:41:46,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:41:46,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:41:46,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:41:46,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:41:46,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:41:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:41:46,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:41:46,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:41:46,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 17:41:46,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:41:46,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-27 17:41:46,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:41:46,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:41:46,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:41:46,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 17:41:46,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:41:46,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-27 17:41:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:41:46,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:41:47,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:41:47,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 17:41:47,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:41:47,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-27 17:41:47,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:41:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:41:47,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 17:41:47,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-27 17:41:47,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:41:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 17:41:47,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244395617] [2020-10-27 17:41:47,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:41:47,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 17:41:47,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116369507] [2020-10-27 17:41:47,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 17:41:47,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:41:47,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 17:41:47,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 17:41:47,381 INFO L87 Difference]: Start difference. First operand 56981 states and 73259 transitions. Second operand 7 states. [2020-10-27 17:41:48,343 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 17:42:02,850 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 66