/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 SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 23:54:11,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 23:54:11,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 23:54:11,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 23:54:11,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 23:54:11,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 23:54:11,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 23:54:11,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 23:54:11,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 23:54:11,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 23:54:11,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 23:54:11,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 23:54:11,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 23:54:11,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 23:54:11,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 23:54:11,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 23:54:11,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 23:54:11,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 23:54:11,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 23:54:11,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 23:54:11,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 23:54:11,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 23:54:11,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 23:54:11,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 23:54:11,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 23:54:11,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 23:54:11,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 23:54:11,333 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 23:54:11,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 23:54:11,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 23:54:11,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 23:54:11,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 23:54:11,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 23:54:11,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 23:54:11,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 23:54:11,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 23:54:11,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 23:54:11,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 23:54:11,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 23:54:11,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 23:54:11,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 23:54:11,348 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 [2020-09-24 23:54:11,373 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 23:54:11,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 23:54:11,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 23:54:11,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 23:54:11,375 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 23:54:11,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 23:54:11,376 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 23:54:11,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 23:54:11,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 23:54:11,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 23:54:11,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 23:54:11,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 23:54:11,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 23:54:11,377 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 23:54:11,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 23:54:11,378 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 23:54:11,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 23:54:11,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 23:54:11,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 23:54:11,379 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 23:54:11,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 23:54:11,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 23:54:11,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 23:54:11,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 23:54:11,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 23:54:11,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 23:54:11,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 23:54:11,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 23:54:11,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 23:54:11,381 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 -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-09-24 23:54:11,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 23:54:11,867 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 23:54:11,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 23:54:11,874 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 23:54:11,875 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 23:54:11,876 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label49.c [2020-09-24 23:54:11,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2288ac2c9/05a1f060edd74a3695a7b1c6f9851660/FLAG811f0077a [2020-09-24 23:54:12,605 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 23:54:12,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label49.c [2020-09-24 23:54:12,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2288ac2c9/05a1f060edd74a3695a7b1c6f9851660/FLAG811f0077a [2020-09-24 23:54:12,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2288ac2c9/05a1f060edd74a3695a7b1c6f9851660 [2020-09-24 23:54:12,832 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 23:54:12,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 23:54:12,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 23:54:12,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 23:54:12,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 23:54:12,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:54:12" (1/1) ... [2020-09-24 23:54:12,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:54:12, skipping insertion in model container [2020-09-24 23:54:12,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:54:12" (1/1) ... [2020-09-24 23:54:12,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 23:54:12,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 23:54:13,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:54:13,545 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 23:54:13,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:54:13,785 INFO L208 MainTranslator]: Completed translation [2020-09-24 23:54:13,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:54:13 WrapperNode [2020-09-24 23:54:13,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 23:54:13,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 23:54:13,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 23:54:13,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 23:54:13,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:54:13" (1/1) ... [2020-09-24 23:54:13,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:54:13" (1/1) ... [2020-09-24 23:54:13,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:54:13" (1/1) ... [2020-09-24 23:54:13,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:54:13" (1/1) ... [2020-09-24 23:54:13,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:54:13" (1/1) ... [2020-09-24 23:54:13,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:54:13" (1/1) ... [2020-09-24 23:54:13,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:54:13" (1/1) ... [2020-09-24 23:54:13,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 23:54:13,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 23:54:13,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 23:54:13,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 23:54:13,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:54:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 23:54:13,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 23:54:13,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 23:54:13,992 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 23:54:13,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 23:54:13,993 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 23:54:13,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 23:54:13,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 23:54:13,994 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 23:54:13,995 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 23:54:13,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 23:54:13,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 23:54:15,313 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 23:54:15,313 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 23:54:15,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:54:15 BoogieIcfgContainer [2020-09-24 23:54:15,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 23:54:15,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 23:54:15,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 23:54:15,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 23:54:15,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:54:12" (1/3) ... [2020-09-24 23:54:15,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:54:15, skipping insertion in model container [2020-09-24 23:54:15,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:54:13" (2/3) ... [2020-09-24 23:54:15,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33478af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:54:15, skipping insertion in model container [2020-09-24 23:54:15,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:54:15" (3/3) ... [2020-09-24 23:54:15,332 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label49.c [2020-09-24 23:54:15,343 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 23:54:15,356 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 23:54:15,377 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 23:54:15,419 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 23:54:15,420 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 23:54:15,420 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 23:54:15,420 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 23:54:15,420 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 23:54:15,420 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 23:54:15,421 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 23:54:15,421 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 23:54:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 23:54:15,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-24 23:54:15,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:54:15,507 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] [2020-09-24 23:54:15,507 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:54:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:54:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2140935381, now seen corresponding path program 1 times [2020-09-24 23:54:15,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:54:15,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036488076] [2020-09-24 23:54:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:54:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:54:15,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:16,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:17,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:17,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:18,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:20,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:20,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:54:20,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-24 23:54:20,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 23:54:20,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-09-24 23:54:20,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:54:20,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 23:54:20,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 23:54:20,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 23:54:20,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 23:54:21,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:54:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:54:21,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:21,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:54:21,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 23:54:21,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:54:21,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-24 23:54:21,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:54:21,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:54:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:54:21,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 23:54:21,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:54:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:54:22,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036488076] [2020-09-24 23:54:22,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:54:22,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 23:54:22,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037228229] [2020-09-24 23:54:22,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 23:54:22,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:54:22,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 23:54:22,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-24 23:54:22,206 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 23:54:22,833 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-24 23:54:23,117 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-09-24 23:54:23,441 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-09-24 23:54:23,976 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-09-24 23:54:24,979 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-09-24 23:54:25,503 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-09-24 23:54:27,253 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-09-24 23:54:29,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:54:29,993 INFO L93 Difference]: Finished difference Result 1701 states and 2422 transitions. [2020-09-24 23:54:29,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 23:54:29,996 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 135 [2020-09-24 23:54:29,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:54:30,029 INFO L225 Difference]: With dead ends: 1701 [2020-09-24 23:54:30,029 INFO L226 Difference]: Without dead ends: 1103 [2020-09-24 23:54:30,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 23:54:30,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2020-09-24 23:54:30,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 985. [2020-09-24 23:54:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 23:54:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1150 transitions. [2020-09-24 23:54:30,176 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1150 transitions. Word has length 135 [2020-09-24 23:54:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:54:30,177 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1150 transitions. [2020-09-24 23:54:30,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 23:54:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1150 transitions. [2020-09-24 23:54:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-24 23:54:30,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:54:30,184 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 23:54:30,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 23:54:30,184 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:54:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:54:30,185 INFO L82 PathProgramCache]: Analyzing trace with hash 582615064, now seen corresponding path program 1 times [2020-09-24 23:54:30,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:54:30,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413338164] [2020-09-24 23:54:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:54:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:54:30,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:30,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:30,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:31,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:31,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:33,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:35,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:54:35,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-24 23:54:35,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 23:54:35,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 23:54:35,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:54:35,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-24 23:54:35,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 23:54:35,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-24 23:54:35,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:54:36,163 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2020-09-24 23:54:36,393 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 50 [2020-09-24 23:54:36,693 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 53 [2020-09-24 23:54:37,062 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 54 [2020-09-24 23:54:37,373 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 50 [2020-09-24 23:54:37,689 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2020-09-24 23:54:37,982 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 45 [2020-09-24 23:54:38,228 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2020-09-24 23:54:38,468 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 40 [2020-09-24 23:54:38,722 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 39 [2020-09-24 23:54:38,968 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2020-09-24 23:54:39,177 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 31 [2020-09-24 23:54:39,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:54:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:54:39,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:39,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:54:39,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 23:54:39,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:54:39,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-24 23:54:39,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:54:39,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:54:39,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:54:39,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 23:54:39,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:54:39,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 23:54:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:54:39,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:39,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:54:39,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 23:54:39,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:54:39,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-24 23:54:39,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:54:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:54:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 23:54:39,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 23:54:39,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:54:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:54:39,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413338164] [2020-09-24 23:54:39,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:54:39,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 23:54:39,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661944891] [2020-09-24 23:54:39,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 23:54:39,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:54:39,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 23:54:39,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-09-24 23:54:39,829 INFO L87 Difference]: Start difference. First operand 985 states and 1150 transitions. Second operand 26 states. [2020-09-24 23:54:40,507 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-09-24 23:54:40,707 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-09-24 23:54:41,159 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 117 [2020-09-24 23:54:41,477 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-09-24 23:54:41,987 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 117 [2020-09-24 23:54:42,773 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2020-09-24 23:54:42,943 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-09-24 23:54:43,433 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 114 [2020-09-24 23:54:43,769 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-09-24 23:54:44,968 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 112 [2020-09-24 23:54:45,629 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 110 [2020-09-24 23:54:46,076 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 109 [2020-09-24 23:54:46,466 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-09-24 23:54:46,986 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 106 [2020-09-24 23:54:47,542 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 105 [2020-09-24 23:54:47,728 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-24 23:54:48,170 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 104 [2020-09-24 23:54:48,535 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 99 [2020-09-24 23:54:48,943 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-09-24 23:54:49,291 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-09-24 23:54:49,484 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-09-24 23:54:50,786 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2020-09-24 23:54:51,309 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2020-09-24 23:54:51,727 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 84 [2020-09-24 23:54:51,977 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-09-24 23:54:52,236 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2020-09-24 23:54:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:54:53,628 INFO L93 Difference]: Finished difference Result 2284 states and 2680 transitions. [2020-09-24 23:54:53,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-24 23:54:53,630 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 152 [2020-09-24 23:54:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:54:53,640 INFO L225 Difference]: With dead ends: 2284 [2020-09-24 23:54:53,640 INFO L226 Difference]: Without dead ends: 1387 [2020-09-24 23:54:53,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1179, Invalid=2853, Unknown=0, NotChecked=0, Total=4032 [2020-09-24 23:54:53,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2020-09-24 23:54:53,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1231. [2020-09-24 23:54:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1231 states. [2020-09-24 23:54:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1437 transitions. [2020-09-24 23:54:53,693 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1437 transitions. Word has length 152 [2020-09-24 23:54:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:54:53,694 INFO L479 AbstractCegarLoop]: Abstraction has 1231 states and 1437 transitions. [2020-09-24 23:54:53,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 23:54:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1437 transitions. [2020-09-24 23:54:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-24 23:54:53,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:54:53,698 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 23:54:53,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 23:54:53,699 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:54:53,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:54:53,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1996643290, now seen corresponding path program 1 times [2020-09-24 23:54:53,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:54:53,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082706491] [2020-09-24 23:54:53,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:54:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:54:53,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:53,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:54,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:54,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:54,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:54,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:55,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:56,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:57,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:58,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:58,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:54:58,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-09-24 23:54:58,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 23:54:58,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-24 23:54:58,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:54:58,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 23:54:58,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 23:54:58,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 23:54:58,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:54:59,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:54:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:54:59,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:59,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:54:59,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 23:54:59,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:54:59,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-24 23:54:59,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:54:59,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 23:54:59,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:54:59,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 23:54:59,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 23:54:59,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 23:54:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:54:59,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:59,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:54:59,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:54:59,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 23:54:59,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:54:59,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-09-24 23:54:59,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:54:59,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 23:54:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 23:54:59,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 23:54:59,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:54:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:54:59,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082706491] [2020-09-24 23:54:59,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 23:54:59,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 23:54:59,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221330389] [2020-09-24 23:54:59,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 23:54:59,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:54:59,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 23:54:59,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-24 23:54:59,840 INFO L87 Difference]: Start difference. First operand 1231 states and 1437 transitions. Second operand 13 states.