/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:47:17,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:47:17,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:47:17,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:47:17,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:47:17,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:47:17,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:47:17,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:47:17,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:47:17,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:47:17,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:47:17,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:47:17,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:47:17,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:47:17,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:47:17,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:47:17,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:47:17,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:47:17,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:47:17,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:47:17,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:47:17,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:47:17,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:47:17,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:47:17,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:47:17,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:47:17,388 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:47:17,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:47:17,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:47:17,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:47:17,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:47:17,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:47:17,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:47:17,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:47:17,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:47:17,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:47:17,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:47:17,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:47:17,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:47:17,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:47:17,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:47:17,407 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 [2020-10-28 08:47:17,436 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:47:17,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:47:17,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:47:17,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:47:17,438 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:47:17,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:47:17,438 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:47:17,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:47:17,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:47:17,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:47:17,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:47:17,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:47:17,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:47:17,440 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:47:17,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:47:17,440 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:47:17,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:47:17,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:47:17,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:47:17,441 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:47:17,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:47:17,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:47:17,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:47:17,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:47:17,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:47:17,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:47:17,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:47:17,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:47:17,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:47:17,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:47:17,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:47:17,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:47:17,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:47:17,931 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:47:17,932 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:47:17,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2020-10-28 08:47:18,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7cf9c910/e22331d36be64417bfcf61e3529782de/FLAG289cf255e [2020-10-28 08:47:18,782 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:47:18,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2020-10-28 08:47:18,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7cf9c910/e22331d36be64417bfcf61e3529782de/FLAG289cf255e [2020-10-28 08:47:19,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7cf9c910/e22331d36be64417bfcf61e3529782de [2020-10-28 08:47:19,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:47:19,119 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:47:19,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:47:19,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:47:19,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:47:19,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:47:19" (1/1) ... [2020-10-28 08:47:19,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1124215d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:19, skipping insertion in model container [2020-10-28 08:47:19,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:47:19" (1/1) ... [2020-10-28 08:47:19,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:47:19,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:47:19,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:47:19,360 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:47:19,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:47:19,428 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:47:19,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:19 WrapperNode [2020-10-28 08:47:19,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:47:19,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:47:19,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:47:19,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:47:19,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:19" (1/1) ... [2020-10-28 08:47:19,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:19" (1/1) ... [2020-10-28 08:47:19,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:19" (1/1) ... [2020-10-28 08:47:19,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:19" (1/1) ... [2020-10-28 08:47:19,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:19" (1/1) ... [2020-10-28 08:47:19,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:19" (1/1) ... [2020-10-28 08:47:19,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:19" (1/1) ... [2020-10-28 08:47:19,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:47:19,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:47:19,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:47:19,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:47:19,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:19" (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 [2020-10-28 08:47:19,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:47:19,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:47:19,637 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:47:19,637 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 08:47:19,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:47:19,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:47:19,638 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:47:19,638 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:47:19,639 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:47:19,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:47:19,640 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 08:47:19,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:47:19,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-28 08:47:19,640 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:47:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:47:19,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:47:19,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:47:19,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:47:19,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:47:19,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:47:20,290 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:47:20,291 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-28 08:47:20,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:47:20 BoogieIcfgContainer [2020-10-28 08:47:20,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:47:20,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:47:20,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:47:20,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:47:20,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:47:19" (1/3) ... [2020-10-28 08:47:20,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1702afae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:47:20, skipping insertion in model container [2020-10-28 08:47:20,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:47:19" (2/3) ... [2020-10-28 08:47:20,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1702afae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:47:20, skipping insertion in model container [2020-10-28 08:47:20,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:47:20" (3/3) ... [2020-10-28 08:47:20,306 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m4.c [2020-10-28 08:47:20,319 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:47:20,325 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:47:20,342 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:47:20,375 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:47:20,375 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:47:20,376 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:47:20,376 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:47:20,376 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:47:20,377 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:47:20,377 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:47:20,377 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:47:20,400 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-28 08:47:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:47:20,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:20,408 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] [2020-10-28 08:47:20,409 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:20,416 INFO L82 PathProgramCache]: Analyzing trace with hash 784075536, now seen corresponding path program 1 times [2020-10-28 08:47:20,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:20,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279600484] [2020-10-28 08:47:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:20,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:20,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:21,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:25,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:47:25,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 08:47:25,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4432 [2020-10-28 08:47:25,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:25,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:25,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:25,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:47:25,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:25,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:47:25,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:25,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:25,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:25,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:25,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:47:25,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:25,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:25,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:47:25,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279600484] [2020-10-28 08:47:25,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:47:25,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:47:25,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49408693] [2020-10-28 08:47:25,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:47:25,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:25,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:47:25,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:47:25,186 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-10-28 08:47:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:25,393 INFO L93 Difference]: Finished difference Result 88 states and 125 transitions. [2020-10-28 08:47:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:47:25,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-28 08:47:25,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:25,405 INFO L225 Difference]: With dead ends: 88 [2020-10-28 08:47:25,406 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 08:47:25,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:47:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 08:47:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 08:47:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 08:47:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-28 08:47:25,465 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 29 [2020-10-28 08:47:25,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:25,466 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-28 08:47:25,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:47:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-28 08:47:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:47:25,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:25,468 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] [2020-10-28 08:47:25,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:47:25,468 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:25,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1811168738, now seen corresponding path program 1 times [2020-10-28 08:47:25,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:25,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470933616] [2020-10-28 08:47:25,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:25,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:25,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:28,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:30,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:30,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:47:30,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 08:47:30,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:47:30,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:30,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:30,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:47:30,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:30,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:47:30,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:30,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:30,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:30,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:30,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:30,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:30,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:47:30,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:30,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:30,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:30,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:30,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:30,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:47:30,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470933616] [2020-10-28 08:47:30,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:47:30,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:47:30,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568531757] [2020-10-28 08:47:30,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:47:30,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:30,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:47:30,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:47:30,631 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2020-10-28 08:47:31,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:31,007 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-28 08:47:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:47:31,007 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-28 08:47:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:31,009 INFO L225 Difference]: With dead ends: 82 [2020-10-28 08:47:31,009 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 08:47:31,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:47:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 08:47:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-10-28 08:47:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 08:47:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-28 08:47:31,023 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 29 [2020-10-28 08:47:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:31,023 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-28 08:47:31,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:47:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-28 08:47:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:47:31,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:31,025 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] [2020-10-28 08:47:31,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:47:31,026 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:31,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:31,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1846873870, now seen corresponding path program 1 times [2020-10-28 08:47:31,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:31,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861459646] [2020-10-28 08:47:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:31,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:31,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:32,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:36,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:36,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:47:36,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:47:36,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:47:36,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:36,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:36,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:47:36,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:36,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:47:36,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:36,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:36,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:36,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:36,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:36,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:36,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:47:36,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:36,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:36,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:36,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:36,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:36,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 08:47:36,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861459646] [2020-10-28 08:47:36,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:47:36,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:47:36,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448205952] [2020-10-28 08:47:36,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:47:36,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:36,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:47:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:47:36,139 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 4 states. [2020-10-28 08:47:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:36,323 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-10-28 08:47:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:47:36,324 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-28 08:47:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:36,325 INFO L225 Difference]: With dead ends: 87 [2020-10-28 08:47:36,325 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 08:47:36,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:47:36,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 08:47:36,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-28 08:47:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 08:47:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-28 08:47:36,336 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 45 [2020-10-28 08:47:36,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:36,337 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-28 08:47:36,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:47:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-28 08:47:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 08:47:36,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:36,338 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] [2020-10-28 08:47:36,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:47:36,339 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:36,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:36,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1834269708, now seen corresponding path program 1 times [2020-10-28 08:47:36,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:36,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691637260] [2020-10-28 08:47:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:36,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:36,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:36,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:36,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:36,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:36,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:36,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:39,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:41,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:41,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 08:47:41,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:47:41,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:47:41,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:41,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:41,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:47:41,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:41,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:47:41,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:41,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:41,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:41,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:41,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:41,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:41,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 08:47:41,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:41,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:41,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:41,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:41,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:41,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:47:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 08:47:41,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691637260] [2020-10-28 08:47:41,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:41,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:47:41,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307475170] [2020-10-28 08:47:41,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:47:41,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:41,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:47:41,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:47:41,510 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2020-10-28 08:47:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:41,823 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2020-10-28 08:47:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:47:41,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-28 08:47:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:41,825 INFO L225 Difference]: With dead ends: 98 [2020-10-28 08:47:41,825 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 08:47:41,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:47:41,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 08:47:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-28 08:47:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 08:47:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-28 08:47:41,837 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 47 [2020-10-28 08:47:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:41,837 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-28 08:47:41,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:47:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-28 08:47:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:47:41,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:41,840 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:47:41,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:47:41,840 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:41,841 INFO L82 PathProgramCache]: Analyzing trace with hash 540070660, now seen corresponding path program 2 times [2020-10-28 08:47:41,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:41,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255086777] [2020-10-28 08:47:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:41,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:42,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:42,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:43,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:44,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:45,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:46,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:46,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:47:46,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:47:46,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:47:46,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:46,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:46,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:47:46,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:46,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:47:46,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:46,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:46,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:46,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:46,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:46,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:46,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:47:46,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:46,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:46,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:46,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:46,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:46,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-28 08:47:46,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255086777] [2020-10-28 08:47:46,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:46,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:47:46,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108389546] [2020-10-28 08:47:46,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:47:46,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:46,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:47:46,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:47:46,956 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 5 states. [2020-10-28 08:47:47,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:47,122 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2020-10-28 08:47:47,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:47:47,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-28 08:47:47,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:47,124 INFO L225 Difference]: With dead ends: 120 [2020-10-28 08:47:47,124 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 08:47:47,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:47:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 08:47:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-28 08:47:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 08:47:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-28 08:47:47,144 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 63 [2020-10-28 08:47:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:47,144 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-28 08:47:47,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:47:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-28 08:47:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 08:47:47,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:47,147 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 08:47:47,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:47:47,147 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:47,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1240934790, now seen corresponding path program 3 times [2020-10-28 08:47:47,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:47,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806763110] [2020-10-28 08:47:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:47,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:47,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:48,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:49,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:50,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:51,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:52,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:52,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:52,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 08:47:52,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:47:52,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5175 [2020-10-28 08:47:52,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:52,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:52,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 08:47:52,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:52,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 08:47:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:47:54,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:47:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:54,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:54,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:54,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:47:54,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:47:54,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:47:54,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:54,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:47:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:47:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:47:54,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 25 [2020-10-28 08:47:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:47:54,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806763110] [2020-10-28 08:47:54,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:47:54,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 08:47:54,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257448816] [2020-10-28 08:47:54,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 08:47:54,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:47:54,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 08:47:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=921, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:47:54,651 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 32 states. [2020-10-28 08:47:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:56,417 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2020-10-28 08:47:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 08:47:56,419 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2020-10-28 08:47:56,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:56,422 INFO L225 Difference]: With dead ends: 119 [2020-10-28 08:47:56,422 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 08:47:56,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:47:56,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 08:47:56,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2020-10-28 08:47:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 08:47:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2020-10-28 08:47:56,453 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 65 [2020-10-28 08:47:56,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:56,456 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2020-10-28 08:47:56,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 08:47:56,456 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2020-10-28 08:47:56,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 08:47:56,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:56,463 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-28 08:47:56,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:47:56,464 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:56,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:56,464 INFO L82 PathProgramCache]: Analyzing trace with hash 913182792, now seen corresponding path program 4 times [2020-10-28 08:47:56,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:56,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727821670] [2020-10-28 08:47:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:56,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:56,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:56,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:56,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:56,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:56,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:01,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:01,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 08:48:01,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:48:01,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:48:01,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:01,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:01,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:48:01,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 08:48:01,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:48:01,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:01,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:01,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:01,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:01,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:01,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:01,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:48:01,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:01,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:01,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:01,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:01,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:01,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 08:48:01,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727821670] [2020-10-28 08:48:01,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:01,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:48:01,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723589121] [2020-10-28 08:48:01,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:48:01,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:01,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:48:01,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:48:01,629 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand 10 states. [2020-10-28 08:48:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:02,529 INFO L93 Difference]: Finished difference Result 166 states and 193 transitions. [2020-10-28 08:48:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:48:02,530 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-28 08:48:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:02,531 INFO L225 Difference]: With dead ends: 166 [2020-10-28 08:48:02,531 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 08:48:02,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:48:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 08:48:02,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2020-10-28 08:48:02,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-28 08:48:02,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2020-10-28 08:48:02,573 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 67 [2020-10-28 08:48:02,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:02,573 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2020-10-28 08:48:02,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:48:02,574 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2020-10-28 08:48:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 08:48:02,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:02,580 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-28 08:48:02,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:48:02,581 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:02,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:02,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1030264440, now seen corresponding path program 5 times [2020-10-28 08:48:02,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:02,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900070914] [2020-10-28 08:48:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:02,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:02,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:02,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:02,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:02,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:02,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:04,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:07,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:07,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 08:48:07,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:48:07,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:48:07,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:07,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:07,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:48:07,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:07,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 08:48:07,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:07,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:07,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:07,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:07,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:07,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:07,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:48:07,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:07,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:07,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:07,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:07,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:07,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 08:48:07,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900070914] [2020-10-28 08:48:07,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:07,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:48:07,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726787491] [2020-10-28 08:48:07,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:48:07,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:07,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:48:07,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:48:07,753 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand 10 states. [2020-10-28 08:48:08,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:08,304 INFO L93 Difference]: Finished difference Result 228 states and 257 transitions. [2020-10-28 08:48:08,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:48:08,305 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-28 08:48:08,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:08,307 INFO L225 Difference]: With dead ends: 228 [2020-10-28 08:48:08,307 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 08:48:08,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:48:08,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 08:48:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-28 08:48:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 08:48:08,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2020-10-28 08:48:08,324 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 67 [2020-10-28 08:48:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:08,325 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2020-10-28 08:48:08,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:48:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2020-10-28 08:48:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 08:48:08,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:08,327 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-28 08:48:08,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:48:08,327 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:08,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:08,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1550495498, now seen corresponding path program 6 times [2020-10-28 08:48:08,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:08,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416067023] [2020-10-28 08:48:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:08,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:08,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:08,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:08,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:08,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:08,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:12,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:13,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:13,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 08:48:13,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:48:13,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:48:13,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:13,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:13,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:48:13,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:13,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 08:48:13,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:13,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:13,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:13,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:13,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:13,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:13,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:48:13,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:13,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:13,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:13,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:13,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:13,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 08:48:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-28 08:48:13,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416067023] [2020-10-28 08:48:13,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:13,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:48:13,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785031998] [2020-10-28 08:48:13,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:48:13,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:13,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:48:13,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:48:13,491 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand 10 states. [2020-10-28 08:48:14,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:14,079 INFO L93 Difference]: Finished difference Result 171 states and 191 transitions. [2020-10-28 08:48:14,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:48:14,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-28 08:48:14,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:14,082 INFO L225 Difference]: With dead ends: 171 [2020-10-28 08:48:14,082 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 08:48:14,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:48:14,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 08:48:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-28 08:48:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 08:48:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-10-28 08:48:14,111 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 69 [2020-10-28 08:48:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:14,111 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-10-28 08:48:14,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:48:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-10-28 08:48:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:48:14,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:14,118 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:14,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:48:14,123 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:14,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:14,124 INFO L82 PathProgramCache]: Analyzing trace with hash -826339688, now seen corresponding path program 7 times [2020-10-28 08:48:14,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:14,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971422335] [2020-10-28 08:48:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:14,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:15,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:16,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:19,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:19,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:48:19,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:48:19,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:48:19,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:19,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-28 08:48:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 08:48:19,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:25,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:25,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:25,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:25,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:25,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:25,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:48:25,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:25,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:25,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:25,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:25,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:25,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:48:25,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971422335] [2020-10-28 08:48:25,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:25,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-28 08:48:25,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796884868] [2020-10-28 08:48:25,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-28 08:48:25,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:25,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-28 08:48:25,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 08:48:25,639 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 57 states. [2020-10-28 08:48:27,436 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-28 08:48:30,582 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-28 08:48:31,584 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-28 08:48:32,082 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-28 08:48:33,388 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-28 08:48:35,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:35,529 INFO L93 Difference]: Finished difference Result 155 states and 170 transitions. [2020-10-28 08:48:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-28 08:48:35,530 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 83 [2020-10-28 08:48:35,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:35,533 INFO L225 Difference]: With dead ends: 155 [2020-10-28 08:48:35,533 INFO L226 Difference]: Without dead ends: 149 [2020-10-28 08:48:35,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=517, Invalid=8603, Unknown=0, NotChecked=0, Total=9120 [2020-10-28 08:48:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-28 08:48:35,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 137. [2020-10-28 08:48:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 08:48:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2020-10-28 08:48:35,562 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 83 [2020-10-28 08:48:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:35,563 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2020-10-28 08:48:35,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-28 08:48:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2020-10-28 08:48:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 08:48:35,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:35,564 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:35,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:48:35,565 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:35,565 INFO L82 PathProgramCache]: Analyzing trace with hash -874714918, now seen corresponding path program 8 times [2020-10-28 08:48:35,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:35,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636065494] [2020-10-28 08:48:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:35,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:35,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:35,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:35,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:35,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:36,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:40,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:40,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 08:48:40,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:48:40,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:48:40,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:40,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:40,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:48:40,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 08:48:40,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:48:40,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:40,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:40,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:40,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:40,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:40,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:40,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:48:40,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:40,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:40,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-28 08:48:40,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636065494] [2020-10-28 08:48:40,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:40,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:48:40,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519626795] [2020-10-28 08:48:40,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:48:40,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:40,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:48:40,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:48:40,802 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand 12 states. [2020-10-28 08:48:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:41,950 INFO L93 Difference]: Finished difference Result 210 states and 237 transitions. [2020-10-28 08:48:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:48:41,951 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-10-28 08:48:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:41,952 INFO L225 Difference]: With dead ends: 210 [2020-10-28 08:48:41,953 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 08:48:41,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:48:41,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 08:48:41,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 141. [2020-10-28 08:48:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-28 08:48:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2020-10-28 08:48:41,977 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 85 [2020-10-28 08:48:41,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:41,979 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2020-10-28 08:48:41,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:48:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2020-10-28 08:48:41,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 08:48:41,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:41,980 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:41,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:48:41,981 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:41,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash 888820250, now seen corresponding path program 9 times [2020-10-28 08:48:41,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:41,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513613308] [2020-10-28 08:48:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:42,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:42,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:42,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:42,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:42,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:42,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:47,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:47,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 08:48:47,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:48:47,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:48:47,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:47,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:47,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:48:47,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:47,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 08:48:47,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:47,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:47,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:47,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:47,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:47,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:47,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:48:47,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:47,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:47,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:47,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:47,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:47,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:48:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-28 08:48:47,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513613308] [2020-10-28 08:48:47,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:47,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:48:47,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673057765] [2020-10-28 08:48:47,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:48:47,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:47,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:48:47,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:48:47,185 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand 12 states. [2020-10-28 08:48:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:47,944 INFO L93 Difference]: Finished difference Result 286 states and 315 transitions. [2020-10-28 08:48:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:48:47,945 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-10-28 08:48:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:47,947 INFO L225 Difference]: With dead ends: 286 [2020-10-28 08:48:47,947 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 08:48:47,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:48:47,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 08:48:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-28 08:48:47,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 08:48:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 157 transitions. [2020-10-28 08:48:47,962 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 157 transitions. Word has length 85 [2020-10-28 08:48:47,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:47,962 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 157 transitions. [2020-10-28 08:48:47,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:48:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 157 transitions. [2020-10-28 08:48:47,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 08:48:47,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:47,964 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:47,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:48:47,964 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:47,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:47,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2095840028, now seen corresponding path program 10 times [2020-10-28 08:48:47,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:47,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292178993] [2020-10-28 08:48:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:47,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:48,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:48,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:48,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:48,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:48,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:52,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:52,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 08:48:52,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:48:52,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:48:52,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:52,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:52,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:48:52,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:52,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 08:48:52,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:53,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:48:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:53,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:53,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:53,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:48:53,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:48:53,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:48:53,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:53,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:48:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:48:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:48:53,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:48:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-28 08:48:53,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292178993] [2020-10-28 08:48:53,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:48:53,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:48:53,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425459038] [2020-10-28 08:48:53,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:48:53,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:48:53,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:48:53,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:48:53,184 INFO L87 Difference]: Start difference. First operand 143 states and 157 transitions. Second operand 12 states. [2020-10-28 08:48:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:48:53,801 INFO L93 Difference]: Finished difference Result 211 states and 231 transitions. [2020-10-28 08:48:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:48:53,802 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-10-28 08:48:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:48:53,803 INFO L225 Difference]: With dead ends: 211 [2020-10-28 08:48:53,804 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 08:48:53,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:48:53,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 08:48:53,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-28 08:48:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 08:48:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2020-10-28 08:48:53,815 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 87 [2020-10-28 08:48:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:48:53,815 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2020-10-28 08:48:53,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:48:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2020-10-28 08:48:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:48:53,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:48:53,816 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:48:53,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:48:53,817 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:48:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:48:53,817 INFO L82 PathProgramCache]: Analyzing trace with hash -362671318, now seen corresponding path program 11 times [2020-10-28 08:48:53,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:48:53,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155610868] [2020-10-28 08:48:53,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:48:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:48:53,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:55,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:58,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:48:59,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:48:59,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:48:59,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:48:59,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6055 [2020-10-28 08:48:59,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:48:59,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:48:59,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-28 08:48:59,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:48:59,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 08:48:59,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:02,195 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-28 08:49:02,587 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-28 08:49:02,807 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-28 08:49:03,037 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-28 08:49:03,270 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-28 08:49:03,504 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-28 08:49:03,757 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-28 08:49:03,973 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-28 08:49:04,190 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-28 08:49:04,411 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-28 08:49:04,638 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-28 08:49:04,887 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-28 08:49:05,773 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-28 08:49:06,010 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-28 08:49:06,474 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-28 08:49:13,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:49:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:49:13,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:49:13,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:49:13,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:49:13,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:49:13,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:49:13,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:49:13,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:49:13,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:49:13,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:49:13,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:49:13,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:49:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:49:14,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155610868] [2020-10-28 08:49:14,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:49:14,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-28 08:49:14,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073422947] [2020-10-28 08:49:14,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-28 08:49:14,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:49:14,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-28 08:49:14,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=5514, Unknown=0, NotChecked=0, Total=6006 [2020-10-28 08:49:14,028 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 78 states. [2020-10-28 08:49:14,675 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 36 [2020-10-28 08:49:15,828 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-28 08:49:16,294 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-28 08:49:17,734 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 117 [2020-10-28 08:49:18,536 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 91 [2020-10-28 08:49:19,368 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 86 [2020-10-28 08:49:20,282 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 90 [2020-10-28 08:49:21,116 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2020-10-28 08:49:22,033 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 102 [2020-10-28 08:49:22,974 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 98 [2020-10-28 08:49:23,584 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 74 [2020-10-28 08:49:24,051 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2020-10-28 08:49:24,949 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 102 [2020-10-28 08:49:25,289 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 56 [2020-10-28 08:49:25,777 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-28 08:49:26,203 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-28 08:49:26,813 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2020-10-28 08:49:27,190 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-28 08:49:27,548 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-10-28 08:49:28,094 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-28 08:49:28,462 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 08:49:28,889 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-10-28 08:49:29,211 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-28 08:49:30,059 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 97 [2020-10-28 08:49:30,389 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-28 08:49:30,793 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-28 08:49:31,408 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 91 [2020-10-28 08:49:32,486 WARN L193 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 99 [2020-10-28 08:49:33,112 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 90 [2020-10-28 08:49:34,170 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 88 [2020-10-28 08:49:34,665 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 76 [2020-10-28 08:49:35,565 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2020-10-28 08:49:36,506 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 96 [2020-10-28 08:49:36,883 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-28 08:49:37,724 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 89 [2020-10-28 08:49:38,185 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-28 08:49:39,012 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 82 [2020-10-28 08:49:39,445 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-28 08:49:40,313 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 93 [2020-10-28 08:49:41,475 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 86 [2020-10-28 08:49:42,179 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2020-10-28 08:49:42,743 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-28 08:49:43,437 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-28 08:49:43,984 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-28 08:49:44,512 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-28 08:49:45,609 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 99 [2020-10-28 08:49:46,648 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 96 [2020-10-28 08:49:47,522 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2020-10-28 08:49:48,439 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 94 [2020-10-28 08:49:49,015 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 39 [2020-10-28 08:49:50,346 WARN L193 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 106 [2020-10-28 08:49:51,494 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 95 [2020-10-28 08:49:54,016 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 94 [2020-10-28 08:49:55,366 WARN L193 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2020-10-28 08:49:55,931 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 48 [2020-10-28 08:49:56,428 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-28 08:49:57,048 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 50 [2020-10-28 08:49:57,455 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-28 08:49:58,036 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 53 [2020-10-28 08:49:58,381 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-28 08:49:58,992 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 46 [2020-10-28 08:49:59,567 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 50 [2020-10-28 08:50:00,255 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 54 [2020-10-28 08:50:01,095 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 71 [2020-10-28 08:50:02,125 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 87 [2020-10-28 08:50:03,157 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 57 [2020-10-28 08:50:04,246 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 71 [2020-10-28 08:50:05,284 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 57 [2020-10-28 08:50:05,732 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 33 [2020-10-28 08:50:06,745 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 66 [2020-10-28 08:50:07,945 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 66 [2020-10-28 08:50:09,194 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 71 [2020-10-28 08:50:10,469 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 71 [2020-10-28 08:50:11,650 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 74 [2020-10-28 08:50:12,096 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 34 [2020-10-28 08:50:13,050 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 90 [2020-10-28 08:50:13,899 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 107 [2020-10-28 08:50:14,717 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2020-10-28 08:50:15,619 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2020-10-28 08:50:16,400 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2020-10-28 08:50:17,427 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 90 [2020-10-28 08:50:20,659 WARN L193 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2020-10-28 08:50:21,431 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-10-28 08:50:22,455 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-28 08:50:23,382 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2020-10-28 08:50:24,541 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 73 [2020-10-28 08:50:25,241 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-28 08:50:26,257 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 32 [2020-10-28 08:50:26,805 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-28 08:50:27,851 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2020-10-28 08:50:28,322 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-28 08:50:29,601 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2020-10-28 08:50:30,578 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2020-10-28 08:50:31,019 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-28 08:50:32,154 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-10-28 08:50:33,197 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-28 08:50:34,115 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 49 [2020-10-28 08:50:35,395 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-10-28 08:50:36,504 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 73 [2020-10-28 08:50:37,664 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-28 08:50:38,667 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 57 [2020-10-28 08:50:39,821 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-10-28 08:50:40,931 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 57 [2020-10-28 08:50:41,923 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-28 08:50:43,108 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 63 [2020-10-28 08:50:44,879 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 63 [2020-10-28 08:50:46,747 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2020-10-28 08:50:48,582 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2020-10-28 08:50:50,121 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2020-10-28 08:50:51,306 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-28 08:50:52,880 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84