/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=SHALLOWEST --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/Problem13_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:17:12,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:17:12,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:17:12,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:17:12,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:17:12,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:17:12,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:17:12,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:17:12,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:17:12,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:17:12,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:17:12,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:17:12,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:17:12,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:17:12,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:17:12,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:17:12,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:17:12,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:17:12,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:17:12,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:17:12,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:17:12,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:17:12,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:17:12,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:17:12,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:17:12,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:17:12,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:17:13,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:17:13,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:17:13,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:17:13,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:17:13,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:17:13,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:17:13,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:17:13,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:17:13,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:17:13,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:17:13,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:17:13,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:17:13,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:17:13,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:17:13,020 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 [2020-10-26 23:17:13,049 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:17:13,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:17:13,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:17:13,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:17:13,052 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:17:13,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:17:13,052 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:17:13,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:17:13,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:17:13,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:17:13,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:17:13,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:17:13,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:17:13,054 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:17:13,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:17:13,055 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:17:13,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:17:13,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:17:13,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:17:13,056 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:17:13,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:17:13,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:17:13,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:17:13,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:17:13,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:17:13,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:17:13,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:17:13,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:17:13,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:17:13,059 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:17:13,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:17:13,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:17:13,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:17:13,553 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:17:13,553 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:17:13,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label53.c [2020-10-26 23:17:13,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0502c33f5/5c3aad98b9ce4300a4f33e5f3c6ce868/FLAG25a772a80 [2020-10-26 23:17:14,947 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:17:14,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label53.c [2020-10-26 23:17:14,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0502c33f5/5c3aad98b9ce4300a4f33e5f3c6ce868/FLAG25a772a80 [2020-10-26 23:17:15,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0502c33f5/5c3aad98b9ce4300a4f33e5f3c6ce868 [2020-10-26 23:17:15,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:17:15,300 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:17:15,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:17:15,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:17:15,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:17:15,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:17:15" (1/1) ... [2020-10-26 23:17:15,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388af41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:15, skipping insertion in model container [2020-10-26 23:17:15,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:17:15" (1/1) ... [2020-10-26 23:17:15,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:17:15,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:17:17,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:17:17,536 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:17:18,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:17:18,514 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:17:18,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:18 WrapperNode [2020-10-26 23:17:18,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:17:18,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:17:18,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:17:18,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:17:18,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:18" (1/1) ... [2020-10-26 23:17:18,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:18" (1/1) ... [2020-10-26 23:17:18,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:18" (1/1) ... [2020-10-26 23:17:18,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:18" (1/1) ... [2020-10-26 23:17:18,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:18" (1/1) ... [2020-10-26 23:17:18,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:18" (1/1) ... [2020-10-26 23:17:18,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:18" (1/1) ... [2020-10-26 23:17:19,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:17:19,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:17:19,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:17:19,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:17:19,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:18" (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 [2020-10-26 23:17:19,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:17:19,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:17:19,112 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:17:19,112 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:17:19,112 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:17:19,112 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:17:19,112 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:17:19,112 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:17:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:17:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:17:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:17:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:17:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:17:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:17:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:17:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:17:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:17:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:17:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:17:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:17:19,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:17:19,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:17:19,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:17:19,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:17:19,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:17:30,500 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:17:30,502 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:17:30,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:17:30 BoogieIcfgContainer [2020-10-26 23:17:30,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:17:30,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:17:30,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:17:30,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:17:30,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:17:15" (1/3) ... [2020-10-26 23:17:30,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe2ff7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:17:30, skipping insertion in model container [2020-10-26 23:17:30,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:17:18" (2/3) ... [2020-10-26 23:17:30,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe2ff7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:17:30, skipping insertion in model container [2020-10-26 23:17:30,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:17:30" (3/3) ... [2020-10-26 23:17:30,526 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label53.c [2020-10-26 23:17:30,542 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:17:30,552 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:17:30,568 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:17:30,634 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:17:30,634 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:17:30,634 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:17:30,634 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:17:30,635 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:17:30,635 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:17:30,635 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:17:30,635 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:17:30,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:17:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 23:17:30,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:17:30,708 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] [2020-10-26 23:17:30,709 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:17:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:17:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash -564276294, now seen corresponding path program 1 times [2020-10-26 23:17:30,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:17:30,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348857657] [2020-10-26 23:17:30,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:17:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:31,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:31,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:31,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 23:17:31,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:31,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-26 23:17:31,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:31,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:17:31,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:17:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 23:17:31,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:17:31,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:17:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:31,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:32,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:32,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:17:32,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:32,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 23:17:32,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:32,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:17:32,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:17:32,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:17:32,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:17:32,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348857657] [2020-10-26 23:17:32,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:17:32,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:17:32,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584426110] [2020-10-26 23:17:32,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:17:32,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:17:32,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:17:32,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:17:32,073 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-26 23:17:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:17:50,817 INFO L93 Difference]: Finished difference Result 3209 states and 5919 transitions. [2020-10-26 23:17:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:17:50,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-26 23:17:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:17:50,865 INFO L225 Difference]: With dead ends: 3209 [2020-10-26 23:17:50,866 INFO L226 Difference]: Without dead ends: 2007 [2020-10-26 23:17:50,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:17:50,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2020-10-26 23:17:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1921. [2020-10-26 23:17:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1921 states. [2020-10-26 23:17:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 3312 transitions. [2020-10-26 23:17:51,089 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 3312 transitions. Word has length 38 [2020-10-26 23:17:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:17:51,090 INFO L481 AbstractCegarLoop]: Abstraction has 1921 states and 3312 transitions. [2020-10-26 23:17:51,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:17:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 3312 transitions. [2020-10-26 23:17:51,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 23:17:51,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:17:51,096 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, 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] [2020-10-26 23:17:51,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:17:51,097 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:17:51,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:17:51,097 INFO L82 PathProgramCache]: Analyzing trace with hash 706513630, now seen corresponding path program 1 times [2020-10-26 23:17:51,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:17:51,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020674685] [2020-10-26 23:17:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:17:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:51,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:51,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:52,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:53,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:53,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 23:17:53,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:17:53,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2218 [2020-10-26 23:17:53,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:17:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:17:53,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:17:53,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:17:53,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:17:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:53,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:53,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:53,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:17:53,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:53,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:17:53,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:17:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:17:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:17:53,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 23:17:53,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:17:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:17:53,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:17:53,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:17:53,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:17:53,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:17:53,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-26 23:17:53,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:17:53,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:17:53,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:17:53,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:17:53,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:17:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:17:53,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020674685] [2020-10-26 23:17:53,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:17:53,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:17:53,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471887645] [2020-10-26 23:17:53,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:17:53,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:17:53,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:17:53,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:17:53,912 INFO L87 Difference]: Start difference. First operand 1921 states and 3312 transitions. Second operand 7 states. [2020-10-26 23:17:54,089 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:18:14,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:18:14,716 INFO L93 Difference]: Finished difference Result 5590 states and 9739 transitions. [2020-10-26 23:18:14,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:18:14,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-10-26 23:18:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:18:14,750 INFO L225 Difference]: With dead ends: 5590 [2020-10-26 23:18:14,751 INFO L226 Difference]: Without dead ends: 3675 [2020-10-26 23:18:14,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:18:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-10-26 23:18:14,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3633. [2020-10-26 23:18:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3633 states. [2020-10-26 23:18:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 5503 transitions. [2020-10-26 23:18:14,940 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 5503 transitions. Word has length 107 [2020-10-26 23:18:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:18:14,941 INFO L481 AbstractCegarLoop]: Abstraction has 3633 states and 5503 transitions. [2020-10-26 23:18:14,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:18:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 5503 transitions. [2020-10-26 23:18:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 23:18:14,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:18:14,957 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, 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] [2020-10-26 23:18:14,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:18:14,958 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:18:14,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:18:14,959 INFO L82 PathProgramCache]: Analyzing trace with hash -758037094, now seen corresponding path program 1 times [2020-10-26 23:18:14,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:18:14,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94498101] [2020-10-26 23:18:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:18:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:15,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:15,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:15,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:16,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:16,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 23:18:16,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:18:16,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1204 [2020-10-26 23:18:16,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:16,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:18:16,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:18:16,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:18:16,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:16,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:18:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:16,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:16,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:16,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:18:16,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:16,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 23:18:16,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:18:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:18:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:18:16,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:16,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:18:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:16,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:16,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:16,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 23:18:16,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:16,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-26 23:18:16,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:16,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:18:16,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:18:16,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 23:18:16,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:18:16,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94498101] [2020-10-26 23:18:16,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:18:16,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:18:16,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501500278] [2020-10-26 23:18:16,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:18:16,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:18:16,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:18:16,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:18:16,813 INFO L87 Difference]: Start difference. First operand 3633 states and 5503 transitions. Second operand 7 states. [2020-10-26 23:18:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:18:49,438 INFO L93 Difference]: Finished difference Result 14203 states and 22224 transitions. [2020-10-26 23:18:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:18:49,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2020-10-26 23:18:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:18:49,512 INFO L225 Difference]: With dead ends: 14203 [2020-10-26 23:18:49,512 INFO L226 Difference]: Without dead ends: 10576 [2020-10-26 23:18:49,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:18:49,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10576 states. [2020-10-26 23:18:49,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10576 to 10520. [2020-10-26 23:18:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10520 states. [2020-10-26 23:18:49,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10520 states to 10520 states and 14821 transitions. [2020-10-26 23:18:49,925 INFO L78 Accepts]: Start accepts. Automaton has 10520 states and 14821 transitions. Word has length 109 [2020-10-26 23:18:49,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:18:49,928 INFO L481 AbstractCegarLoop]: Abstraction has 10520 states and 14821 transitions. [2020-10-26 23:18:49,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:18:49,928 INFO L276 IsEmpty]: Start isEmpty. Operand 10520 states and 14821 transitions. [2020-10-26 23:18:49,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 23:18:49,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:18:49,937 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, 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] [2020-10-26 23:18:49,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:18:49,938 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:18:49,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:18:49,938 INFO L82 PathProgramCache]: Analyzing trace with hash 532803122, now seen corresponding path program 1 times [2020-10-26 23:18:49,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:18:49,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970807812] [2020-10-26 23:18:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:18:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:50,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:50,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:50,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:51,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:51,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-26 23:18:51,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:18:51,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1735 [2020-10-26 23:18:51,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:18:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:18:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:18:51,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:51,886 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:18:51,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:18:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:51,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:51,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:51,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:18:51,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:51,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:18:51,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:51,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:18:51,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:18:51,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:18:51,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:51,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:18:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:18:51,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:18:52,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:18:52,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:18:52,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:18:52,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-26 23:18:52,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:18:52,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:18:52,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:18:52,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:18:52,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:18:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:18:52,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970807812] [2020-10-26 23:18:52,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:18:52,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:18:52,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764322948] [2020-10-26 23:18:52,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:18:52,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:18:52,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:18:52,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:18:52,291 INFO L87 Difference]: Start difference. First operand 10520 states and 14821 transitions. Second operand 7 states. [2020-10-26 23:19:30,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:19:30,828 INFO L93 Difference]: Finished difference Result 31821 states and 47288 transitions. [2020-10-26 23:19:30,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:19:30,831 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2020-10-26 23:19:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:19:30,957 INFO L225 Difference]: With dead ends: 31821 [2020-10-26 23:19:30,957 INFO L226 Difference]: Without dead ends: 21307 [2020-10-26 23:19:31,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:19:31,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21307 states. [2020-10-26 23:19:31,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21307 to 20207. [2020-10-26 23:19:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20207 states. [2020-10-26 23:19:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20207 states to 20207 states and 27600 transitions. [2020-10-26 23:19:31,729 INFO L78 Accepts]: Start accepts. Automaton has 20207 states and 27600 transitions. Word has length 113 [2020-10-26 23:19:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:19:31,729 INFO L481 AbstractCegarLoop]: Abstraction has 20207 states and 27600 transitions. [2020-10-26 23:19:31,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:19:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 20207 states and 27600 transitions. [2020-10-26 23:19:31,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-26 23:19:31,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:19:31,733 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:19:31,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:19:31,733 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:19:31,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:19:31,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1860757774, now seen corresponding path program 1 times [2020-10-26 23:19:31,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:19:31,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535181688] [2020-10-26 23:19:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:19:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:31,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:32,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:33,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:33,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-26 23:19:33,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:19:33,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1394 [2020-10-26 23:19:33,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:33,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:19:33,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:19:33,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-26 23:19:33,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:33,441 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:19:33,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:19:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:33,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:33,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:33,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:19:33,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:33,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:19:33,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:33,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:19:33,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:19:33,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:19:33,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:33,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:19:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:33,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:33,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:33,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:19:33,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:33,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-26 23:19:33,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:33,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:19:33,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:19:33,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:19:33,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:19:33,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535181688] [2020-10-26 23:19:33,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:19:33,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:19:33,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035263198] [2020-10-26 23:19:33,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:19:33,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:19:33,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:19:33,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:19:33,971 INFO L87 Difference]: Start difference. First operand 20207 states and 27600 transitions. Second operand 7 states. [2020-10-26 23:19:34,132 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:20:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:20:03,580 INFO L93 Difference]: Finished difference Result 60724 states and 87188 transitions. [2020-10-26 23:20:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:20:03,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2020-10-26 23:20:03,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:20:03,756 INFO L225 Difference]: With dead ends: 60724 [2020-10-26 23:20:03,756 INFO L226 Difference]: Without dead ends: 40523 [2020-10-26 23:20:03,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:20:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40523 states. [2020-10-26 23:20:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40523 to 37780. [2020-10-26 23:20:05,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37780 states. [2020-10-26 23:20:05,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37780 states to 37780 states and 50172 transitions. [2020-10-26 23:20:05,234 INFO L78 Accepts]: Start accepts. Automaton has 37780 states and 50172 transitions. Word has length 145 [2020-10-26 23:20:05,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:20:05,235 INFO L481 AbstractCegarLoop]: Abstraction has 37780 states and 50172 transitions. [2020-10-26 23:20:05,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:20:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 37780 states and 50172 transitions. [2020-10-26 23:20:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-26 23:20:05,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:20:05,241 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, 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, 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] [2020-10-26 23:20:05,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:20:05,241 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:20:05,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:20:05,242 INFO L82 PathProgramCache]: Analyzing trace with hash -409737218, now seen corresponding path program 1 times [2020-10-26 23:20:05,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:20:05,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143502616] [2020-10-26 23:20:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:20:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:05,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:05,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:06,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:10,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:10,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-26 23:20:10,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:20:10,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-26 23:20:10,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:20:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:20:10,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:20:10,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:10,782 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:20:10,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:20:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:10,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:10,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:10,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:20:10,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:10,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 23:20:10,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:10,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:20:10,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:20:10,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:20:10,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:10,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:20:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:10,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:11,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:11,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:20:11,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:11,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-26 23:20:11,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:11,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:20:11,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:20:11,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:20:11,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:11,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:20:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:11,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:11,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:11,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:20:11,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:11,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-26 23:20:11,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:11,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:20:11,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:20:11,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:20:11,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 60 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:20:11,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143502616] [2020-10-26 23:20:11,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:20:11,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:20:11,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665285021] [2020-10-26 23:20:11,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:20:11,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:20:11,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:20:11,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:20:11,883 INFO L87 Difference]: Start difference. First operand 37780 states and 50172 transitions. Second operand 7 states. [2020-10-26 23:20:12,078 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:20:14,730 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 23:20:43,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:20:43,397 INFO L93 Difference]: Finished difference Result 76877 states and 102619 transitions. [2020-10-26 23:20:43,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:20:43,399 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 238 [2020-10-26 23:20:43,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:20:43,555 INFO L225 Difference]: With dead ends: 76877 [2020-10-26 23:20:43,555 INFO L226 Difference]: Without dead ends: 39103 [2020-10-26 23:20:43,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:20:43,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39103 states. [2020-10-26 23:20:44,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39103 to 38861. [2020-10-26 23:20:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38861 states. [2020-10-26 23:20:44,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38861 states to 38861 states and 51637 transitions. [2020-10-26 23:20:44,624 INFO L78 Accepts]: Start accepts. Automaton has 38861 states and 51637 transitions. Word has length 238 [2020-10-26 23:20:44,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:20:44,625 INFO L481 AbstractCegarLoop]: Abstraction has 38861 states and 51637 transitions. [2020-10-26 23:20:44,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:20:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 38861 states and 51637 transitions. [2020-10-26 23:20:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-26 23:20:44,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:20:44,630 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, 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, 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] [2020-10-26 23:20:44,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:20:44,631 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:20:44,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:20:44,632 INFO L82 PathProgramCache]: Analyzing trace with hash 834323381, now seen corresponding path program 1 times [2020-10-26 23:20:44,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:20:44,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114311672] [2020-10-26 23:20:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:20:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:44,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:45,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:46,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:46,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-26 23:20:46,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:20:46,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1672 [2020-10-26 23:20:46,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:46,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:20:46,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:20:46,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 23:20:46,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:46,607 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:20:46,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:20:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:46,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:46,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:46,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:20:46,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:46,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:20:46,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:46,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:20:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:20:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:20:46,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:20:46,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:20:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:46,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:46,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:46,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:20:46,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:46,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 23:20:46,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:20:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:20:46,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:20:46,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:46,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:20:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:46,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:47,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:47,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:20:47,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:47,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-26 23:20:47,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:47,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:20:47,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:20:47,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:20:47,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:20:47,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114311672] [2020-10-26 23:20:47,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:20:47,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:20:47,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669199763] [2020-10-26 23:20:47,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:20:47,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:20:47,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:20:47,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:20:47,349 INFO L87 Difference]: Start difference. First operand 38861 states and 51637 transitions. Second operand 7 states. [2020-10-26 23:20:47,513 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:20:51,427 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66