/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 11:41:50,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 11:41:50,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 11:41:50,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 11:41:50,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 11:41:50,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 11:41:50,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 11:41:50,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 11:41:50,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 11:41:50,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 11:41:50,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 11:41:50,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 11:41:50,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 11:41:50,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 11:41:50,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 11:41:50,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 11:41:50,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 11:41:50,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 11:41:50,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 11:41:50,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 11:41:50,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 11:41:50,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 11:41:50,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 11:41:50,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 11:41:50,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 11:41:50,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 11:41:50,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 11:41:50,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 11:41:50,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 11:41:50,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 11:41:50,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 11:41:50,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 11:41:50,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 11:41:50,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 11:41:50,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 11:41:50,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 11:41:50,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 11:41:50,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 11:41:50,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 11:41:50,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 11:41:50,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 11:41:50,586 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 [2020-10-12 11:41:50,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 11:41:50,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 11:41:50,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 11:41:50,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 11:41:50,632 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 11:41:50,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 11:41:50,633 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 11:41:50,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 11:41:50,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 11:41:50,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 11:41:50,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 11:41:50,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 11:41:50,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 11:41:50,635 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 11:41:50,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 11:41:50,636 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 11:41:50,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 11:41:50,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 11:41:50,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 11:41:50,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 11:41:50,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 11:41:50,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 11:41:50,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 11:41:50,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 11:41:50,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 11:41:50,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 11:41:50,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 11:41:50,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 11:41:50,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 11:41:50,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 11:41:50,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 11:41:50,935 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 11:41:50,939 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 11:41:50,941 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 11:41:50,941 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 11:41:50,942 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label46.c [2020-10-12 11:41:51,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20da33bf5/05a28d9b4b4e4aa3b5596eb821d06739/FLAGf94dff736 [2020-10-12 11:41:51,806 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 11:41:51,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label46.c [2020-10-12 11:41:51,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20da33bf5/05a28d9b4b4e4aa3b5596eb821d06739/FLAGf94dff736 [2020-10-12 11:41:52,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20da33bf5/05a28d9b4b4e4aa3b5596eb821d06739 [2020-10-12 11:41:52,355 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 11:41:52,357 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 11:41:52,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 11:41:52,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 11:41:52,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 11:41:52,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:41:52" (1/1) ... [2020-10-12 11:41:52,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12925ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:41:52, skipping insertion in model container [2020-10-12 11:41:52,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:41:52" (1/1) ... [2020-10-12 11:41:52,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 11:41:52,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 11:41:54,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 11:41:54,200 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 11:41:55,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 11:41:55,055 INFO L208 MainTranslator]: Completed translation [2020-10-12 11:41:55,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:41:55 WrapperNode [2020-10-12 11:41:55,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 11:41:55,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 11:41:55,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 11:41:55,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 11:41:55,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:41:55" (1/1) ... [2020-10-12 11:41:55,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:41:55" (1/1) ... [2020-10-12 11:41:55,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:41:55" (1/1) ... [2020-10-12 11:41:55,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:41:55" (1/1) ... [2020-10-12 11:41:55,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:41:55" (1/1) ... [2020-10-12 11:41:55,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:41:55" (1/1) ... [2020-10-12 11:41:55,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:41:55" (1/1) ... [2020-10-12 11:41:55,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 11:41:55,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 11:41:55,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 11:41:55,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 11:41:55,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:41:55" (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 [2020-10-12 11:41:55,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 11:41:55,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 11:41:55,505 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 11:41:55,506 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 11:41:55,506 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 11:41:55,506 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 11:41:55,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 11:41:55,506 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 11:41:55,506 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 11:41:55,507 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 11:41:55,507 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 11:41:55,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 11:41:55,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 11:41:55,507 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 11:41:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 11:41:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 11:41:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 11:41:59,789 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 11:41:59,789 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 11:41:59,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:41:59 BoogieIcfgContainer [2020-10-12 11:41:59,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 11:41:59,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 11:41:59,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 11:41:59,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 11:41:59,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 11:41:52" (1/3) ... [2020-10-12 11:41:59,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0d7adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:41:59, skipping insertion in model container [2020-10-12 11:41:59,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:41:55" (2/3) ... [2020-10-12 11:41:59,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0d7adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:41:59, skipping insertion in model container [2020-10-12 11:41:59,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:41:59" (3/3) ... [2020-10-12 11:41:59,815 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem04_label46.c [2020-10-12 11:41:59,828 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 11:41:59,839 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 11:41:59,856 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 11:41:59,889 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 11:41:59,889 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 11:41:59,889 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 11:41:59,889 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 11:41:59,890 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 11:41:59,890 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 11:41:59,890 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 11:41:59,890 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 11:41:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states. [2020-10-12 11:41:59,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2020-10-12 11:41:59,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:41:59,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 11:41:59,984 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:41:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:41:59,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1865936323, now seen corresponding path program 1 times [2020-10-12 11:42:00,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:42:00,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550169114] [2020-10-12 11:42:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:42:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:42:01,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:42:05,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:42:05,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:42:05,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 818 [2020-10-12 11:42:05,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 11:42:05,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-12 11:42:05,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:42:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 11:42:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 11:42:05,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 742 [2020-10-12 11:42:05,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 11:42:07,775 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-12 11:42:07,959 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-12 11:42:08,139 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-12 11:42:08,304 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-12 11:42:08,437 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-12 11:42:09,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:42:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:42:09,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:42:09,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:42:09,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:42:09,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:42:09,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 11:42:09,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:42:09,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:42:09,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:42:09,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 11:42:09,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:42:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 11:42:13,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550169114] [2020-10-12 11:42:13,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 11:42:13,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-12 11:42:13,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038723971] [2020-10-12 11:42:13,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 11:42:13,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:42:13,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 11:42:13,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-12 11:42:13,855 INFO L87 Difference]: Start difference. First operand 906 states. Second operand 18 states. [2020-10-12 11:42:14,338 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-12 11:42:14,545 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 11:42:14,889 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-12 11:42:15,224 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-12 11:42:17,401 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-12 11:42:17,772 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 107 [2020-10-12 11:42:20,002 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 88 [2020-10-12 11:42:21,123 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2020-10-12 11:42:30,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:42:30,358 INFO L93 Difference]: Finished difference Result 2548 states and 4905 transitions. [2020-10-12 11:42:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 11:42:30,361 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 804 [2020-10-12 11:42:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:42:30,441 INFO L225 Difference]: With dead ends: 2548 [2020-10-12 11:42:30,441 INFO L226 Difference]: Without dead ends: 1580 [2020-10-12 11:42:30,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 11:42:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2020-10-12 11:42:30,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1580. [2020-10-12 11:42:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1580 states. [2020-10-12 11:42:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2339 transitions. [2020-10-12 11:42:30,688 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2339 transitions. Word has length 804 [2020-10-12 11:42:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:42:30,691 INFO L479 AbstractCegarLoop]: Abstraction has 1580 states and 2339 transitions. [2020-10-12 11:42:30,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 11:42:30,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2339 transitions. [2020-10-12 11:42:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 824 [2020-10-12 11:42:30,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:42:30,748 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 11:42:30,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 11:42:30,748 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:42:30,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:42:30,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1349340844, now seen corresponding path program 1 times [2020-10-12 11:42:30,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:42:30,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25635309] [2020-10-12 11:42:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:42:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:42:31,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:42:31,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:42:36,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:42:36,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 839 [2020-10-12 11:42:36,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 11:42:36,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5128 [2020-10-12 11:42:36,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:42:36,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 11:42:36,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 11:42:36,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 705 [2020-10-12 11:42:36,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:42:38,209 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-12 11:42:38,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:42:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:42:38,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:42:38,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:42:38,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:42:38,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:42:38,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 11:42:38,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:42:38,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:42:38,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:42:38,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:42:38,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:42:38,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:42:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:42:38,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:42:38,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:42:38,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 11:42:38,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:42:38,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 11:42:38,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:42:38,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:42:38,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:42:38,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 11:42:38,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:42:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 11:42:42,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25635309] [2020-10-12 11:42:42,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:42:42,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 11:42:42,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580296713] [2020-10-12 11:42:42,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 11:42:42,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:42:42,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 11:42:42,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-12 11:42:42,365 INFO L87 Difference]: Start difference. First operand 1580 states and 2339 transitions. Second operand 19 states. [2020-10-12 11:42:42,729 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-12 11:42:43,013 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-12 11:42:45,956 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-12 11:42:47,311 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-12 11:42:47,645 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2020-10-12 11:42:48,568 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-12 11:42:57,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:42:57,102 INFO L93 Difference]: Finished difference Result 3123 states and 5328 transitions. [2020-10-12 11:42:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 11:42:57,105 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 823 [2020-10-12 11:42:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:42:57,117 INFO L225 Difference]: With dead ends: 3123 [2020-10-12 11:42:57,117 INFO L226 Difference]: Without dead ends: 2276 [2020-10-12 11:42:57,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2020-10-12 11:42:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2020-10-12 11:42:57,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2276. [2020-10-12 11:42:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2276 states. [2020-10-12 11:42:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 3045 transitions. [2020-10-12 11:42:57,182 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 3045 transitions. Word has length 823 [2020-10-12 11:42:57,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:42:57,183 INFO L479 AbstractCegarLoop]: Abstraction has 2276 states and 3045 transitions. [2020-10-12 11:42:57,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 11:42:57,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 3045 transitions. [2020-10-12 11:42:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2020-10-12 11:42:57,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:42:57,196 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 11:42:57,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 11:42:57,196 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:42:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:42:57,197 INFO L82 PathProgramCache]: Analyzing trace with hash -321093202, now seen corresponding path program 1 times [2020-10-12 11:42:57,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:42:57,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864708418] [2020-10-12 11:42:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:42:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:42:57,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:42:58,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:02,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:43:02,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 846 [2020-10-12 11:43:02,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 11:43:02,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-12 11:43:02,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:43:02,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 11:43:02,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 11:43:02,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 517 [2020-10-12 11:43:02,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:43:04,730 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2020-10-12 11:43:04,849 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-12 11:43:04,974 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-12 11:43:05,211 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2020-10-12 11:43:05,348 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2020-10-12 11:43:05,554 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 44 [2020-10-12 11:43:05,743 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2020-10-12 11:43:05,939 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2020-10-12 11:43:06,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:43:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:43:06,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:06,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:43:06,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:43:06,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:43:06,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 11:43:06,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:43:06,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:43:06,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:43:06,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:43:06,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 11:43:06,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:43:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:43:06,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:06,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:43:06,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 11:43:06,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:43:06,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 11:43:06,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:43:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:43:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:43:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 11:43:06,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 11:43:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 11:43:10,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864708418] [2020-10-12 11:43:10,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:43:10,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 11:43:10,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145366854] [2020-10-12 11:43:10,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 11:43:10,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:43:10,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 11:43:10,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-12 11:43:10,953 INFO L87 Difference]: Start difference. First operand 2276 states and 3045 transitions. Second operand 17 states. [2020-10-12 11:43:11,343 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-12 11:43:11,503 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-12 11:43:16,085 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-12 11:43:16,877 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-12 11:43:17,097 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-12 11:43:17,425 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2020-10-12 11:43:17,901 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2020-10-12 11:43:19,205 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2020-10-12 11:43:22,904 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2020-10-12 11:43:23,342 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-10-12 11:43:23,557 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2020-10-12 11:43:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:43:28,380 INFO L93 Difference]: Finished difference Result 4329 states and 6367 transitions. [2020-10-12 11:43:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 11:43:28,398 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 830 [2020-10-12 11:43:28,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:43:28,412 INFO L225 Difference]: With dead ends: 4329 [2020-10-12 11:43:28,412 INFO L226 Difference]: Without dead ends: 2786 [2020-10-12 11:43:28,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2020-10-12 11:43:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2020-10-12 11:43:28,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2786. [2020-10-12 11:43:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2786 states. [2020-10-12 11:43:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 3564 transitions. [2020-10-12 11:43:28,482 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 3564 transitions. Word has length 830 [2020-10-12 11:43:28,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:43:28,484 INFO L479 AbstractCegarLoop]: Abstraction has 2786 states and 3564 transitions. [2020-10-12 11:43:28,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 11:43:28,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 3564 transitions. [2020-10-12 11:43:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2020-10-12 11:43:28,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:43:28,498 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 11:43:28,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 11:43:28,498 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:43:28,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:43:28,499 INFO L82 PathProgramCache]: Analyzing trace with hash -247350105, now seen corresponding path program 1 times [2020-10-12 11:43:28,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:43:28,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538160044] [2020-10-12 11:43:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:43:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:43:28,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:29,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:29,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:33,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:43:33,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 858 [2020-10-12 11:43:33,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 11:43:33,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-12 11:43:33,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:43:33,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 11:43:33,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 11:43:33,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 852 [2020-10-12 11:43:33,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:43:34,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:43:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:43:34,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:34,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:43:34,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:43:34,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:43:34,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 11:43:34,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:43:34,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:43:34,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:43:34,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 11:43:34,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:43:34,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:43:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:43:34,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:34,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:34,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:43:34,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 11:43:34,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 11:43:34,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-12 11:43:34,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:43:34,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 11:43:34,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 11:43:34,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 11:43:34,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:43:34,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 11:43:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:43:34,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:34,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:34,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:43:34,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 11:43:34,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 11:43:34,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-12 11:43:34,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:43:34,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 11:43:34,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 11:43:34,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 11:43:34,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:43:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-12 11:43:35,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538160044] [2020-10-12 11:43:35,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:43:35,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 11:43:35,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028822960] [2020-10-12 11:43:35,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 11:43:35,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:43:35,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 11:43:35,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 11:43:35,316 INFO L87 Difference]: Start difference. First operand 2786 states and 3564 transitions. Second operand 6 states. [2020-10-12 11:43:44,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:43:44,185 INFO L93 Difference]: Finished difference Result 5707 states and 8038 transitions. [2020-10-12 11:43:44,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 11:43:44,186 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 840 [2020-10-12 11:43:44,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:43:44,207 INFO L225 Difference]: With dead ends: 5707 [2020-10-12 11:43:44,207 INFO L226 Difference]: Without dead ends: 3654 [2020-10-12 11:43:44,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 11:43:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3654 states. [2020-10-12 11:43:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3654 to 3631. [2020-10-12 11:43:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3631 states. [2020-10-12 11:43:44,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 4719 transitions. [2020-10-12 11:43:44,297 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 4719 transitions. Word has length 840 [2020-10-12 11:43:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:43:44,299 INFO L479 AbstractCegarLoop]: Abstraction has 3631 states and 4719 transitions. [2020-10-12 11:43:44,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 11:43:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 4719 transitions. [2020-10-12 11:43:44,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2020-10-12 11:43:44,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:43:44,315 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 11:43:44,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 11:43:44,315 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:43:44,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:43:44,316 INFO L82 PathProgramCache]: Analyzing trace with hash 384906104, now seen corresponding path program 1 times [2020-10-12 11:43:44,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:43:44,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14550224] [2020-10-12 11:43:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:43:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:43:44,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:45,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:45,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:47,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:49,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:43:49,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 875 [2020-10-12 11:43:49,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 11:43:49,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-12 11:43:49,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:43:49,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 11:43:49,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-12 11:43:49,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 809 [2020-10-12 11:43:49,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:43:49,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:43:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:43:49,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:49,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:43:49,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:43:49,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:43:49,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 11:43:49,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:43:49,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:43:49,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:43:49,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:43:49,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:43:49,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:43:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:43:49,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:49,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:43:49,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 11:43:49,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:43:49,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 11:43:49,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:43:49,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:43:49,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:43:49,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:43:49,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:43:49,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 11:43:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:43:49,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:49,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:43:49,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 11:43:49,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:43:49,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 11:43:49,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:43:49,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:43:49,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:43:49,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:43:49,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:43:49,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 11:43:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:43:49,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:43:49,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:43:49,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 11:43:49,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:43:49,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 11:43:49,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:43:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:43:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:43:49,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 11:43:49,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:43:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-12 11:43:50,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14550224] [2020-10-12 11:43:50,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:43:50,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 11:43:50,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004524981] [2020-10-12 11:43:50,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 11:43:50,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:43:50,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 11:43:50,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 11:43:50,483 INFO L87 Difference]: Start difference. First operand 3631 states and 4719 transitions. Second operand 5 states. [2020-10-12 11:43:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:43:59,749 INFO L93 Difference]: Finished difference Result 8249 states and 11541 transitions. [2020-10-12 11:43:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 11:43:59,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 855 [2020-10-12 11:43:59,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:43:59,774 INFO L225 Difference]: With dead ends: 8249 [2020-10-12 11:43:59,774 INFO L226 Difference]: Without dead ends: 5351 [2020-10-12 11:43:59,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 11:43:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2020-10-12 11:43:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 5340. [2020-10-12 11:43:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5340 states. [2020-10-12 11:43:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5340 states to 5340 states and 7413 transitions. [2020-10-12 11:43:59,893 INFO L78 Accepts]: Start accepts. Automaton has 5340 states and 7413 transitions. Word has length 855 [2020-10-12 11:43:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:43:59,894 INFO L479 AbstractCegarLoop]: Abstraction has 5340 states and 7413 transitions. [2020-10-12 11:43:59,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 11:43:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5340 states and 7413 transitions. [2020-10-12 11:43:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 899 [2020-10-12 11:43:59,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:43:59,915 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 11:43:59,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 11:43:59,916 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:43:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:43:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1593248591, now seen corresponding path program 1 times [2020-10-12 11:43:59,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:43:59,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343994377] [2020-10-12 11:43:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:44:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:44:00,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:00,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:00,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:00,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:03,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:05,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:44:05,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 920 [2020-10-12 11:44:05,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 11:44:05,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 11:44:05,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:44:05,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 11:44:05,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-12 11:44:05,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 689 [2020-10-12 11:44:05,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:44:06,922 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-12 11:44:07,182 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-10-12 11:44:07,522 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 47 [2020-10-12 11:44:07,776 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 43 [2020-10-12 11:44:07,956 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2020-10-12 11:44:08,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:44:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:44:08,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:08,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:44:08,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:44:08,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:44:08,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 11:44:08,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:44:08,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:44:08,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:44:08,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:44:08,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:44:08,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:44:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:44:08,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:08,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:44:08,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 11:44:08,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:44:08,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 11:44:08,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:44:08,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:44:08,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:44:08,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:44:08,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:44:08,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 11:44:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:44:08,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:08,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:44:08,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 11:44:08,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:44:08,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 11:44:08,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:44:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:44:08,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:44:08,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:44:08,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:44:08,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 11:44:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:44:08,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:08,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:44:08,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-12 11:44:08,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:44:08,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 11:44:08,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:44:08,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:44:08,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:44:08,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:44:08,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:44:08,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-12 11:44:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:44:08,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:08,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:44:08,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 11:44:08,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:44:08,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 11:44:08,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:44:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:44:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:44:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 11:44:08,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:44:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 87 proven. 4 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-12 11:44:14,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343994377] [2020-10-12 11:44:14,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:44:14,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 11:44:14,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600287178] [2020-10-12 11:44:14,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 11:44:14,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:44:14,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 11:44:14,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-12 11:44:14,082 INFO L87 Difference]: Start difference. First operand 5340 states and 7413 transitions. Second operand 19 states. [2020-10-12 11:44:15,796 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-12 11:44:19,644 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-12 11:44:21,074 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-12 11:44:23,838 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-12 11:44:31,479 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-12 11:44:31,696 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-12 11:44:33,612 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 102 [2020-10-12 11:44:35,098 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2020-10-12 11:44:37,042 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2020-10-12 11:44:41,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:44:41,565 INFO L93 Difference]: Finished difference Result 10638 states and 15487 transitions. [2020-10-12 11:44:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 11:44:41,566 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 898 [2020-10-12 11:44:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:44:41,591 INFO L225 Difference]: With dead ends: 10638 [2020-10-12 11:44:41,592 INFO L226 Difference]: Without dead ends: 6031 [2020-10-12 11:44:41,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2020-10-12 11:44:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6031 states. [2020-10-12 11:44:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6031 to 6031. [2020-10-12 11:44:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6031 states. [2020-10-12 11:44:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6031 states to 6031 states and 8125 transitions. [2020-10-12 11:44:41,718 INFO L78 Accepts]: Start accepts. Automaton has 6031 states and 8125 transitions. Word has length 898 [2020-10-12 11:44:41,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:44:41,719 INFO L479 AbstractCegarLoop]: Abstraction has 6031 states and 8125 transitions. [2020-10-12 11:44:41,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 11:44:41,719 INFO L276 IsEmpty]: Start isEmpty. Operand 6031 states and 8125 transitions. [2020-10-12 11:44:41,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 907 [2020-10-12 11:44:41,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:44:41,742 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 11:44:41,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 11:44:41,742 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:44:41,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:44:41,743 INFO L82 PathProgramCache]: Analyzing trace with hash -628930494, now seen corresponding path program 1 times [2020-10-12 11:44:41,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:44:41,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554277259] [2020-10-12 11:44:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:44:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:44:41,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:42,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:42,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:45,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:46,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:44:46,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 926 [2020-10-12 11:44:46,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 11:44:46,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-12 11:44:46,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:44:46,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 11:44:46,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 11:44:46,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-12 11:44:46,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:44:47,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:44:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:44:47,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:47,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:44:47,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:44:47,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:44:47,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 11:44:47,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:44:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:44:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:44:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 11:44:47,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:44:47,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:44:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:44:47,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:47,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:47,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:44:47,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 11:44:47,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 11:44:47,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 11:44:47,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:44:47,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 11:44:47,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 11:44:47,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 11:44:47,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:44:47,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 11:44:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:44:47,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:47,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:47,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:44:47,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 11:44:47,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 11:44:47,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-12 11:44:47,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:44:47,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 11:44:47,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 11:44:47,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 11:44:47,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:44:47,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 11:44:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:44:47,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:44:47,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:44:47,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 11:44:47,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:44:47,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-12 11:44:47,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:44:47,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 11:44:47,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 11:44:47,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 11:44:47,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:44:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 117 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-12 11:44:47,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554277259] [2020-10-12 11:44:47,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:44:47,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 11:44:47,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157018519] [2020-10-12 11:44:47,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 11:44:47,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:44:47,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 11:44:47,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 11:44:47,641 INFO L87 Difference]: Start difference. First operand 6031 states and 8125 transitions. Second operand 8 states. [2020-10-12 11:45:00,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 11:45:00,209 INFO L93 Difference]: Finished difference Result 14879 states and 21486 transitions. [2020-10-12 11:45:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 11:45:00,211 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 906 [2020-10-12 11:45:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 11:45:00,263 INFO L225 Difference]: With dead ends: 14879 [2020-10-12 11:45:00,264 INFO L226 Difference]: Without dead ends: 9581 [2020-10-12 11:45:00,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-12 11:45:00,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9581 states. [2020-10-12 11:45:00,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9581 to 9529. [2020-10-12 11:45:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9529 states. [2020-10-12 11:45:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9529 states to 9529 states and 12651 transitions. [2020-10-12 11:45:00,478 INFO L78 Accepts]: Start accepts. Automaton has 9529 states and 12651 transitions. Word has length 906 [2020-10-12 11:45:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 11:45:00,478 INFO L479 AbstractCegarLoop]: Abstraction has 9529 states and 12651 transitions. [2020-10-12 11:45:00,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 11:45:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 9529 states and 12651 transitions. [2020-10-12 11:45:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2020-10-12 11:45:00,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 11:45:00,507 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 11:45:00,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 11:45:00,508 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 11:45:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 11:45:00,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1773152061, now seen corresponding path program 1 times [2020-10-12 11:45:00,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 11:45:00,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772551183] [2020-10-12 11:45:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 11:45:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:45:00,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:45:00,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:45:02,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:45:05,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:45:05,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:45:05,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 978 [2020-10-12 11:45:05,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 11:45:05,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-12 11:45:05,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:45:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 11:45:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-10-12 11:45:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 772 [2020-10-12 11:45:05,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:45:09,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 11:45:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:45:09,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:45:09,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:45:09,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 11:45:09,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:45:09,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 11:45:09,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:45:09,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:45:09,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:45:09,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:45:09,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:45:09,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 11:45:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:45:09,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:45:09,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:45:09,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 11:45:09,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:45:09,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 11:45:09,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:45:09,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:45:09,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:45:09,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:45:09,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:45:09,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 11:45:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:45:09,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:45:09,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:45:09,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 11:45:09,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:45:09,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 11:45:09,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:45:09,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:45:09,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:45:09,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:45:09,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:45:09,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 11:45:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:45:09,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:45:09,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:45:09,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 11:45:09,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:45:09,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 11:45:09,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:45:09,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 11:45:09,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:45:09,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 11:45:09,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 11:45:09,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-12 11:45:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 11:45:09,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 11:45:09,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 11:45:09,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 11:45:09,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 11:45:09,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-12 11:45:09,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 11:45:09,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 11:45:09,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 11:45:09,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 11:45:09,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 11:45:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 145 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-10-12 11:45:15,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772551183] [2020-10-12 11:45:15,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 11:45:15,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 11:45:15,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841069533] [2020-10-12 11:45:15,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 11:45:15,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 11:45:15,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 11:45:15,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-12 11:45:15,098 INFO L87 Difference]: Start difference. First operand 9529 states and 12651 transitions. Second operand 19 states. [2020-10-12 11:45:16,101 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-12 11:45:16,256 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-12 11:45:17,755 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-12 11:45:20,597 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-12 11:45:21,279 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-12 11:45:25,353 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-12 11:45:26,303 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-12 11:45:29,954 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-12 11:45:31,089 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 83