/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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:40:56,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:40:56,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:40:56,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:40:56,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:40:56,802 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:40:56,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:40:56,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:40:56,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:40:56,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:40:56,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:40:56,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:40:56,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:40:56,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:40:56,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:40:56,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:40:56,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:40:56,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:40:56,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:40:56,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:40:56,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:40:56,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:40:56,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:40:56,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:40:56,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:40:56,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:40:56,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:40:56,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:40:56,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:40:56,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:40:56,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:40:56,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:40:56,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:40:56,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:40:56,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:40:56,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:40:56,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:40:56,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:40:56,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:40:56,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:40:56,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:40:56,870 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 21:40:56,920 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:40:56,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:40:56,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:40:56,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:40:56,922 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:40:56,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:40:56,923 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:40:56,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:40:56,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:40:56,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:40:56,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:40:56,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:40:56,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:40:56,925 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:40:56,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:40:56,926 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:40:56,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:40:56,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:40:56,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:40:56,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:40:56,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:40:56,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:40:56,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:40:56,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:40:56,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:40:56,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:40:56,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:40:56,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:40:56,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:40:56,928 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 21:40:57,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:40:57,402 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:40:57,409 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:40:57,411 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:40:57,411 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:40:57,413 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label02.c [2020-09-24 21:40:57,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/157d95f0e/566133e5b4dd4639a845461a40c17f0e/FLAG12ce09b9b [2020-09-24 21:40:58,124 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:40:58,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label02.c [2020-09-24 21:40:58,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/157d95f0e/566133e5b4dd4639a845461a40c17f0e/FLAG12ce09b9b [2020-09-24 21:40:58,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/157d95f0e/566133e5b4dd4639a845461a40c17f0e [2020-09-24 21:40:58,380 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:40:58,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:40:58,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:58,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:40:58,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:40:58,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:58" (1/1) ... [2020-09-24 21:40:58,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:58, skipping insertion in model container [2020-09-24 21:40:58,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:58" (1/1) ... [2020-09-24 21:40:58,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:40:58,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:40:58,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:58,968 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:40:59,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:59,204 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:40:59,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:59 WrapperNode [2020-09-24 21:40:59,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:59,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:40:59,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:40:59,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:40:59,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:59" (1/1) ... [2020-09-24 21:40:59,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:59" (1/1) ... [2020-09-24 21:40:59,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:59" (1/1) ... [2020-09-24 21:40:59,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:59" (1/1) ... [2020-09-24 21:40:59,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:59" (1/1) ... [2020-09-24 21:40:59,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:59" (1/1) ... [2020-09-24 21:40:59,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:59" (1/1) ... [2020-09-24 21:40:59,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:40:59,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:40:59,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:40:59,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:40:59,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:59" (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 21:40:59,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:40:59,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:40:59,436 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:40:59,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:40:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:40:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:40:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:40:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:40:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:40:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:40:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:41:00,747 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:41:00,747 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:41:00,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:00 BoogieIcfgContainer [2020-09-24 21:41:00,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:41:00,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:41:00,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:41:00,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:41:00,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:40:58" (1/3) ... [2020-09-24 21:41:00,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1c64d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:00, skipping insertion in model container [2020-09-24 21:41:00,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:59" (2/3) ... [2020-09-24 21:41:00,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1c64d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:00, skipping insertion in model container [2020-09-24 21:41:00,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:00" (3/3) ... [2020-09-24 21:41:00,766 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label02.c [2020-09-24 21:41:00,778 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:41:00,789 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:41:00,811 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:41:00,845 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:41:00,845 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:41:00,845 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:41:00,846 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:41:00,846 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:41:00,846 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:41:00,846 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:41:00,846 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:41:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:41:00,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-24 21:41:00,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:00,898 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] [2020-09-24 21:41:00,899 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:00,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:00,907 INFO L82 PathProgramCache]: Analyzing trace with hash -299401006, now seen corresponding path program 1 times [2020-09-24 21:41:00,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:00,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400466314] [2020-09-24 21:41:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:01,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:02,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:02,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:02,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:04,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:05,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:05,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:06,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:06,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-09-24 21:41:06,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:41:06,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-24 21:41:06,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:06,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:41:06,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:41:06,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:41:06,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:41:06,792 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:41:06,950 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-09-24 21:41:07,144 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2020-09-24 21:41:07,304 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2020-09-24 21:41:07,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:07,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:07,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:07,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:07,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:07,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-24 21:41:07,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:07,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:07,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:07,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:07,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:07,868 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 21:41:07,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400466314] [2020-09-24 21:41:07,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:41:07,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:41:07,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125113961] [2020-09-24 21:41:07,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:41:07,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:07,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:41:07,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:41:07,900 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:41:08,439 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:41:08,771 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-09-24 21:41:09,089 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2020-09-24 21:41:09,814 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-09-24 21:41:10,257 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-09-24 21:41:11,409 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-09-24 21:41:11,625 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-09-24 21:41:11,959 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-09-24 21:41:12,681 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-09-24 21:41:13,180 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-09-24 21:41:13,373 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-09-24 21:41:14,344 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:41:14,766 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-09-24 21:41:17,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:17,190 INFO L93 Difference]: Finished difference Result 1870 states and 2662 transitions. [2020-09-24 21:41:17,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:41:17,192 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 119 [2020-09-24 21:41:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:17,227 INFO L225 Difference]: With dead ends: 1870 [2020-09-24 21:41:17,228 INFO L226 Difference]: Without dead ends: 1241 [2020-09-24 21:41:17,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:41:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-24 21:41:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1076. [2020-09-24 21:41:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:41:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1294 transitions. [2020-09-24 21:41:17,394 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1294 transitions. Word has length 119 [2020-09-24 21:41:17,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:17,395 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1294 transitions. [2020-09-24 21:41:17,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:41:17,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1294 transitions. [2020-09-24 21:41:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-09-24 21:41:17,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:17,430 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] [2020-09-24 21:41:17,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:41:17,432 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:17,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1202844496, now seen corresponding path program 1 times [2020-09-24 21:41:17,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:17,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521689252] [2020-09-24 21:41:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:17,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:17,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:17,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:17,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:18,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:19,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:19,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:20,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:20,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:21,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:22,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:22,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:22,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-09-24 21:41:22,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:41:22,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-24 21:41:22,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:22,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:41:22,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:22,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:41:22,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:23,197 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-09-24 21:41:23,327 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2020-09-24 21:41:23,460 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2020-09-24 21:41:23,593 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 30 [2020-09-24 21:41:23,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:23,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:23,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:23,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:23,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:23,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 21:41:23,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:23,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:23,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:23,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:23,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:23,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:41:23,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:23,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-24 21:41:23,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:41:23,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:41:24,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521689252] [2020-09-24 21:41:24,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:24,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:41:24,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844169429] [2020-09-24 21:41:24,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:41:24,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:24,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:41:24,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:41:24,253 INFO L87 Difference]: Start difference. First operand 1076 states and 1294 transitions. Second operand 19 states. [2020-09-24 21:41:24,930 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-09-24 21:41:25,459 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 97 [2020-09-24 21:41:25,773 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 94 [2020-09-24 21:41:25,972 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-09-24 21:41:26,430 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-09-24 21:41:26,737 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-09-24 21:41:27,072 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-09-24 21:41:27,204 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-09-24 21:41:27,499 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2020-09-24 21:41:27,835 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2020-09-24 21:41:28,673 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-09-24 21:41:29,300 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2020-09-24 21:41:29,711 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2020-09-24 21:41:30,557 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2020-09-24 21:41:31,143 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-09-24 21:41:31,557 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-09-24 21:41:31,973 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2020-09-24 21:41:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:33,697 INFO L93 Difference]: Finished difference Result 4063 states and 5408 transitions. [2020-09-24 21:41:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-24 21:41:33,700 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 141 [2020-09-24 21:41:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:33,725 INFO L225 Difference]: With dead ends: 4063 [2020-09-24 21:41:33,725 INFO L226 Difference]: Without dead ends: 3067 [2020-09-24 21:41:33,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 21:41:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2020-09-24 21:41:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2844. [2020-09-24 21:41:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2844 states. [2020-09-24 21:41:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 3418 transitions. [2020-09-24 21:41:33,846 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 3418 transitions. Word has length 141 [2020-09-24 21:41:33,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:33,847 INFO L479 AbstractCegarLoop]: Abstraction has 2844 states and 3418 transitions. [2020-09-24 21:41:33,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:41:33,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 3418 transitions. [2020-09-24 21:41:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-24 21:41:33,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:33,879 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] [2020-09-24 21:41:33,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:41:33,880 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:33,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1497550949, now seen corresponding path program 1 times [2020-09-24 21:41:33,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:33,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293463018] [2020-09-24 21:41:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:33,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:34,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:34,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:34,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:34,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:34,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:36,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:37,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:37,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:38,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:38,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:38,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:38,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-09-24 21:41:38,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-09-24 21:41:38,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-24 21:41:38,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:38,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:41:38,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:41:38,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:41:38,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:39,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:39,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:39,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:39,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:39,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:39,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-24 21:41:39,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:39,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:39,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:39,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:39,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:39,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:39,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:39,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:39,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:39,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:41:39,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:39,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 21:41:39,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:39,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:39,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:39,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:41:39,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:39,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:41:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:39,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:39,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:39,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:39,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:41:39,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:39,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-24 21:41:39,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:39,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:39,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:39,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:41:39,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:41:39,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293463018] [2020-09-24 21:41:39,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:39,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:41:39,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034207660] [2020-09-24 21:41:39,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:41:39,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:39,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:41:39,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:41:39,543 INFO L87 Difference]: Start difference. First operand 2844 states and 3418 transitions. Second operand 12 states. [2020-09-24 21:41:40,383 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-09-24 21:41:40,861 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-09-24 21:41:42,600 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-09-24 21:41:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:45,574 INFO L93 Difference]: Finished difference Result 8430 states and 11099 transitions. [2020-09-24 21:41:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:41:45,574 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 154 [2020-09-24 21:41:45,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:45,606 INFO L225 Difference]: With dead ends: 8430 [2020-09-24 21:41:45,606 INFO L226 Difference]: Without dead ends: 5311 [2020-09-24 21:41:45,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:41:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2020-09-24 21:41:45,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 4363. [2020-09-24 21:41:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4363 states. [2020-09-24 21:41:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 5323 transitions. [2020-09-24 21:41:45,763 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 5323 transitions. Word has length 154 [2020-09-24 21:41:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:45,763 INFO L479 AbstractCegarLoop]: Abstraction has 4363 states and 5323 transitions. [2020-09-24 21:41:45,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:41:45,763 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 5323 transitions. [2020-09-24 21:41:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-09-24 21:41:45,775 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:45,775 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:45,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:41:45,776 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:45,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:45,776 INFO L82 PathProgramCache]: Analyzing trace with hash -2073322534, now seen corresponding path program 1 times [2020-09-24 21:41:45,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:45,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348748653] [2020-09-24 21:41:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:45,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:46,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:46,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:46,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:46,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:47,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:47,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:48,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:48,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:48,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking...