/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=LOWLEXORDER --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/Problem02_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:41:03,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:41:03,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:41:03,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:41:03,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:41:03,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:41:03,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:41:03,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:41:03,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:41:03,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:41:03,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:41:03,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:41:03,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:41:03,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:41:03,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:41:03,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:41:03,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:41:03,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:41:03,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:41:03,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:41:03,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:41:03,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:41:03,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:41:03,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:41:03,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:41:03,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:41:03,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:41:03,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:41:03,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:41:03,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:41:03,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:41:03,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:41:03,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:41:03,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:41:03,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:41:03,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:41:03,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:41:03,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:41:03,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:41:03,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:41:03,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:41:03,469 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 21:41:03,522 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:41:03,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:41:03,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:41:03,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:41:03,526 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:41:03,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:41:03,527 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:41:03,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:41:03,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:41:03,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:41:03,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:41:03,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:41:03,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:41:03,529 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:41:03,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:41:03,530 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:41:03,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:41:03,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:41:03,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:41:03,531 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:41:03,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:41:03,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:41:03,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:41:03,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:41:03,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:41:03,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:41:03,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:41:03,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:41:03,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:41:03,533 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:41:03,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:41:04,001 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:41:04,005 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:41:04,008 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:41:04,009 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:41:04,010 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label04.c [2020-09-24 21:41:04,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d33c359fd/a1ee744ccdaf425e8903773b4eb1b5d8/FLAGccd00f572 [2020-09-24 21:41:04,811 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:41:04,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label04.c [2020-09-24 21:41:04,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d33c359fd/a1ee744ccdaf425e8903773b4eb1b5d8/FLAGccd00f572 [2020-09-24 21:41:04,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d33c359fd/a1ee744ccdaf425e8903773b4eb1b5d8 [2020-09-24 21:41:04,994 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:41:05,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:41:05,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:05,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:41:05,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:41:05,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:04" (1/1) ... [2020-09-24 21:41:05,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f9fa743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:05, skipping insertion in model container [2020-09-24 21:41:05,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:04" (1/1) ... [2020-09-24 21:41:05,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:41:05,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:41:05,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:05,620 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:41:05,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:05,808 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:41:05,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:05 WrapperNode [2020-09-24 21:41:05,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:05,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:41:05,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:41:05,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:41:05,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:05" (1/1) ... [2020-09-24 21:41:05,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:05" (1/1) ... [2020-09-24 21:41:05,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:05" (1/1) ... [2020-09-24 21:41:05,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:05" (1/1) ... [2020-09-24 21:41:05,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:05" (1/1) ... [2020-09-24 21:41:05,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:05" (1/1) ... [2020-09-24 21:41:05,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:05" (1/1) ... [2020-09-24 21:41:05,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:41:05,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:41:05,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:41:05,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:41:05,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:05" (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 21:41:06,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:41:06,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:41:06,009 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:41:06,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:41:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:41:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:41:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:41:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:41:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:41:06,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:41:06,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:41:07,332 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:41:07,332 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:41:07,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:07 BoogieIcfgContainer [2020-09-24 21:41:07,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:41:07,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:41:07,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:41:07,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:41:07,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:41:04" (1/3) ... [2020-09-24 21:41:07,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201bc5c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:07, skipping insertion in model container [2020-09-24 21:41:07,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:05" (2/3) ... [2020-09-24 21:41:07,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201bc5c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:07, skipping insertion in model container [2020-09-24 21:41:07,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:07" (3/3) ... [2020-09-24 21:41:07,354 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label04.c [2020-09-24 21:41:07,369 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:41:07,381 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:41:07,408 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:41:07,447 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:41:07,447 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:41:07,447 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:41:07,448 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:41:07,448 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:41:07,448 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:41:07,448 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:41:07,448 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:41:07,484 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:41:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-09-24 21:41:07,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:07,508 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] [2020-09-24 21:41:07,509 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:07,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:07,519 INFO L82 PathProgramCache]: Analyzing trace with hash -361381607, now seen corresponding path program 1 times [2020-09-24 21:41:07,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:07,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569840250] [2020-09-24 21:41:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:07,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:08,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:08,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:10,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:10,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:10,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:11,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:12,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:12,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:12,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:12,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-09-24 21:41:12,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:41:12,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-24 21:41:12,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:12,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:41:12,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:41:12,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:41:12,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:41:13,644 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2020-09-24 21:41:13,780 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2020-09-24 21:41:13,912 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2020-09-24 21:41:14,076 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2020-09-24 21:41:14,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:14,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:14,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:14,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:14,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:14,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-24 21:41:14,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:14,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:14,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:14,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:14,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:14,477 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 21:41:14,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569840250] [2020-09-24 21:41:14,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:41:14,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:41:14,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706120409] [2020-09-24 21:41:14,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:41:14,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:14,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:41:14,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:41:14,503 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:41:15,020 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-09-24 21:41:15,274 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-09-24 21:41:15,529 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-09-24 21:41:15,825 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-09-24 21:41:16,289 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-09-24 21:41:16,664 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2020-09-24 21:41:17,104 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2020-09-24 21:41:18,417 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-09-24 21:41:18,637 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-09-24 21:41:18,985 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 21:41:19,941 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-09-24 21:41:20,516 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-09-24 21:41:20,735 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:41:21,910 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:41:22,417 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-09-24 21:41:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:25,678 INFO L93 Difference]: Finished difference Result 1861 states and 2653 transitions. [2020-09-24 21:41:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:41:25,682 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 132 [2020-09-24 21:41:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:25,732 INFO L225 Difference]: With dead ends: 1861 [2020-09-24 21:41:25,732 INFO L226 Difference]: Without dead ends: 1232 [2020-09-24 21:41:25,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=459, Invalid=1181, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:41:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2020-09-24 21:41:25,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1070. [2020-09-24 21:41:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-09-24 21:41:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1288 transitions. [2020-09-24 21:41:25,945 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1288 transitions. Word has length 132 [2020-09-24 21:41:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:25,946 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1288 transitions. [2020-09-24 21:41:25,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:41:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1288 transitions. [2020-09-24 21:41:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-24 21:41:25,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:25,960 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:41:25,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:41:25,961 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:25,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:25,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1730286085, now seen corresponding path program 1 times [2020-09-24 21:41:25,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:25,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603086229] [2020-09-24 21:41:25,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:26,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:26,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:26,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:26,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:26,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:28,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:29,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:29,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:29,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:30,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:30,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:31,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:31,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-09-24 21:41:31,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:41:31,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-09-24 21:41:31,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:31,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:41:31,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:31,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:41:31,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:41:31,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:31,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:31,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:31,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:31,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:31,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-24 21:41:31,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:31,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:31,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:31,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:31,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:31,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:31,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:31,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:31,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:31,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:41:31,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:31,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-09-24 21:41:31,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:31,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:31,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:41:31,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:41:32,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603086229] [2020-09-24 21:41:32,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:32,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:41:32,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403815080] [2020-09-24 21:41:32,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:41:32,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:32,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:41:32,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:41:32,409 INFO L87 Difference]: Start difference. First operand 1070 states and 1288 transitions. Second operand 20 states. [2020-09-24 21:41:33,196 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-09-24 21:41:33,442 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2020-09-24 21:41:33,855 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-09-24 21:41:34,157 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-09-24 21:41:35,119 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-09-24 21:41:35,439 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-09-24 21:41:35,947 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-09-24 21:41:36,168 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-09-24 21:41:36,360 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-09-24 21:41:36,642 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2020-09-24 21:41:36,921 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-09-24 21:41:37,264 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-09-24 21:41:38,244 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2020-09-24 21:41:38,609 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2020-09-24 21:41:39,002 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-09-24 21:41:39,821 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2020-09-24 21:41:40,328 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-09-24 21:41:41,352 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2020-09-24 21:41:41,642 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-09-24 21:41:42,435 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-09-24 21:41:42,949 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-09-24 21:41:43,459 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2020-09-24 21:41:43,769 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-09-24 21:41:46,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:46,176 INFO L93 Difference]: Finished difference Result 4478 states and 6109 transitions. [2020-09-24 21:41:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-24 21:41:46,177 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 154 [2020-09-24 21:41:46,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:46,205 INFO L225 Difference]: With dead ends: 4478 [2020-09-24 21:41:46,206 INFO L226 Difference]: Without dead ends: 3488 [2020-09-24 21:41:46,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=995, Invalid=2787, Unknown=0, NotChecked=0, Total=3782 [2020-09-24 21:41:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2020-09-24 21:41:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3407. [2020-09-24 21:41:46,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3407 states. [2020-09-24 21:41:46,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 4133 transitions. [2020-09-24 21:41:46,356 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 4133 transitions. Word has length 154 [2020-09-24 21:41:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:46,357 INFO L479 AbstractCegarLoop]: Abstraction has 3407 states and 4133 transitions. [2020-09-24 21:41:46,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:41:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 4133 transitions. [2020-09-24 21:41:46,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-09-24 21:41:46,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:46,378 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:41:46,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:41:46,378 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:46,379 INFO L82 PathProgramCache]: Analyzing trace with hash -959604634, now seen corresponding path program 1 times [2020-09-24 21:41:46,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:46,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230239757] [2020-09-24 21:41:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:46,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:46,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:46,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:46,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:48,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:48,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:51,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:51,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:51,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:51,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-09-24 21:41:51,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:41:51,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-24 21:41:51,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:51,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:41:51,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:41:51,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:41:51,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:51,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:51,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:51,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:51,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:51,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:51,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:41:51,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:51,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:51,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:51,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:51,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:51,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:51,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:51,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:41:51,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:51,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 21:41:51,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:51,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:41:51,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:51,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:41:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:51,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:51,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:51,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:51,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:41:51,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:51,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-24 21:41:51,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:51,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:51,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:51,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:41:51,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:41:52,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230239757] [2020-09-24 21:41:52,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:52,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:41:52,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574543459] [2020-09-24 21:41:52,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:41:52,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:52,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:41:52,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:41:52,258 INFO L87 Difference]: Start difference. First operand 3407 states and 4133 transitions. Second operand 12 states. [2020-09-24 21:41:52,965 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-09-24 21:41:53,667 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-09-24 21:41:55,682 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63