/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_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:41:12,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:41:12,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:41:12,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:41:12,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:41:12,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:41:12,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:41:12,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:41:12,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:41:12,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:41:12,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:41:12,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:41:12,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:41:12,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:41:12,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:41:12,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:41:12,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:41:12,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:41:12,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:41:12,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:41:12,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:41:12,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:41:12,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:41:12,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:41:12,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:41:12,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:41:12,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:41:12,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:41:12,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:41:12,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:41:12,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:41:12,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:41:12,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:41:12,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:41:12,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:41:12,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:41:12,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:41:12,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:41:12,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:41:12,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:41:12,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:41:12,813 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 21:41:12,868 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:41:12,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:41:12,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:41:12,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:41:12,873 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:41:12,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:41:12,874 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:41:12,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:41:12,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:41:12,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:41:12,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:41:12,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:41:12,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:41:12,875 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:41:12,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:41:12,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:41:12,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:41:12,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:41:12,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:41:12,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:41:12,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:41:12,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:41:12,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:41:12,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:41:12,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:41:12,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:41:12,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:41:12,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:41:12,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:41:12,879 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 21:41:13,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:41:13,353 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:41:13,357 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:41:13,359 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:41:13,359 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:41:13,360 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label10.c [2020-09-24 21:41:13,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f4bcb9d3/a81a2309de714dadbb63ff992e909db7/FLAG225ce934a [2020-09-24 21:41:14,046 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:41:14,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label10.c [2020-09-24 21:41:14,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f4bcb9d3/a81a2309de714dadbb63ff992e909db7/FLAG225ce934a [2020-09-24 21:41:14,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f4bcb9d3/a81a2309de714dadbb63ff992e909db7 [2020-09-24 21:41:14,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:41:14,335 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:41:14,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:14,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:41:14,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:41:14,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:14" (1/1) ... [2020-09-24 21:41:14,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67578ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:14, skipping insertion in model container [2020-09-24 21:41:14,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:14" (1/1) ... [2020-09-24 21:41:14,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:41:14,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:41:14,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:15,004 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:41:15,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:15,191 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:41:15,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:15 WrapperNode [2020-09-24 21:41:15,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:15,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:41:15,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:41:15,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:41:15,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:15" (1/1) ... [2020-09-24 21:41:15,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:15" (1/1) ... [2020-09-24 21:41:15,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:15" (1/1) ... [2020-09-24 21:41:15,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:15" (1/1) ... [2020-09-24 21:41:15,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:15" (1/1) ... [2020-09-24 21:41:15,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:15" (1/1) ... [2020-09-24 21:41:15,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:15" (1/1) ... [2020-09-24 21:41:15,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:41:15,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:41:15,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:41:15,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:41:15,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:15" (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 21:41:15,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:41:15,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:41:15,431 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:41:15,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:41:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:41:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:41:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:41:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:41:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:41:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:41:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:41:16,723 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:41:16,724 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:41:16,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:16 BoogieIcfgContainer [2020-09-24 21:41:16,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:41:16,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:41:16,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:41:16,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:41:16,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:41:14" (1/3) ... [2020-09-24 21:41:16,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f76319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:16, skipping insertion in model container [2020-09-24 21:41:16,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:15" (2/3) ... [2020-09-24 21:41:16,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f76319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:16, skipping insertion in model container [2020-09-24 21:41:16,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:16" (3/3) ... [2020-09-24 21:41:16,742 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label10.c [2020-09-24 21:41:16,753 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:41:16,763 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:41:16,785 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:41:16,816 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:41:16,816 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:41:16,816 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:41:16,817 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:41:16,817 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:41:16,817 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:41:16,817 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:41:16,817 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:41:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:41:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-24 21:41:16,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:16,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:41:16,875 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:16,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2114164186, now seen corresponding path program 1 times [2020-09-24 21:41:16,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:16,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89265295] [2020-09-24 21:41:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:17,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:17,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:17,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:18,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:18,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:18,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:20,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:20,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:21,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:22,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:22,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-09-24 21:41:22,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:41:22,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 21:41:22,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:22,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:41:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:41:22,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:41:22,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:41:22,842 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-09-24 21:41:22,997 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2020-09-24 21:41:23,158 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2020-09-24 21:41:23,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:23,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:23,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:23,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:23,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:23,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-24 21:41:23,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:23,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:23,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:23,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:23,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:23,742 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 21:41:23,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89265295] [2020-09-24 21:41:23,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:41:23,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:41:23,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043018742] [2020-09-24 21:41:23,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:41:23,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:23,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:41:23,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:41:23,774 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:41:24,538 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-09-24 21:41:24,764 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-09-24 21:41:25,346 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-09-24 21:41:25,754 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-09-24 21:41:26,857 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-09-24 21:41:27,030 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-09-24 21:41:27,342 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:41:28,040 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-09-24 21:41:28,531 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-09-24 21:41:28,717 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-09-24 21:41:29,708 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-09-24 21:41:30,120 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-09-24 21:41:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:32,503 INFO L93 Difference]: Finished difference Result 1861 states and 2653 transitions. [2020-09-24 21:41:32,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:41:32,505 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 161 [2020-09-24 21:41:32,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:32,532 INFO L225 Difference]: With dead ends: 1861 [2020-09-24 21:41:32,533 INFO L226 Difference]: Without dead ends: 1232 [2020-09-24 21:41:32,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:41:32,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2020-09-24 21:41:32,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1070. [2020-09-24 21:41:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-09-24 21:41:32,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1288 transitions. [2020-09-24 21:41:32,681 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1288 transitions. Word has length 161 [2020-09-24 21:41:32,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:32,681 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1288 transitions. [2020-09-24 21:41:32,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:41:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1288 transitions. [2020-09-24 21:41:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-09-24 21:41:32,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:32,695 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, 1, 1, 1, 1, 1, 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 21:41:32,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:41:32,695 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:32,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1903530952, now seen corresponding path program 1 times [2020-09-24 21:41:32,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:32,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678618707] [2020-09-24 21:41:32,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:32,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:32,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:33,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:33,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:34,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:37,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:37,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:37,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-09-24 21:41:37,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:41:37,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-24 21:41:37,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:37,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:41:37,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:37,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:41:37,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:38,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:38,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:38,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:38,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:38,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:38,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 21:41:38,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:38,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:38,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:38,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:38,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:38,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:38,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:38,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:38,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:41:38,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:38,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 21:41:38,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:38,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:38,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:38,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:41:38,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:38,783 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 21:41:38,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678618707] [2020-09-24 21:41:38,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:38,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:41:38,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372383395] [2020-09-24 21:41:38,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:41:38,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:38,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:41:38,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:41:38,788 INFO L87 Difference]: Start difference. First operand 1070 states and 1288 transitions. Second operand 19 states. [2020-09-24 21:41:39,954 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-09-24 21:41:40,194 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-09-24 21:41:41,557 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:41:41,776 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-09-24 21:41:43,153 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-09-24 21:41:43,533 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-09-24 21:41:44,835 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-09-24 21:41:45,584 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-09-24 21:41:47,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:47,266 INFO L93 Difference]: Finished difference Result 4079 states and 5460 transitions. [2020-09-24 21:41:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:41:47,268 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 183 [2020-09-24 21:41:47,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:47,288 INFO L225 Difference]: With dead ends: 4079 [2020-09-24 21:41:47,288 INFO L226 Difference]: Without dead ends: 3089 [2020-09-24 21:41:47,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=593, Invalid=1477, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 21:41:47,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2020-09-24 21:41:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 3017. [2020-09-24 21:41:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3017 states. [2020-09-24 21:41:47,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 3661 transitions. [2020-09-24 21:41:47,398 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 3661 transitions. Word has length 183 [2020-09-24 21:41:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:47,399 INFO L479 AbstractCegarLoop]: Abstraction has 3017 states and 3661 transitions. [2020-09-24 21:41:47,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:41:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 3661 transitions. [2020-09-24 21:41:47,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-24 21:41:47,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:47,412 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, 1, 1, 1, 1, 1, 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 21:41:47,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:41:47,413 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:47,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:47,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1390494291, now seen corresponding path program 1 times [2020-09-24 21:41:47,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:47,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622211031] [2020-09-24 21:41:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:47,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:47,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:47,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:47,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:51,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:52,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:52,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-09-24 21:41:52,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:41:52,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-24 21:41:52,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:52,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:41:52,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:41:52,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:41:52,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:52,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:52,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:52,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:52,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:52,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:52,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 21:41:52,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:52,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:52,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:52,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:52,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:52,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:52,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:52,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:52,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:52,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:41:52,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:52,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 21:41:52,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:52,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:52,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:52,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:41:52,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-24 21:41:52,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:41:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:52,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:52,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:52,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:52,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:41:52,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:52,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-24 21:41:52,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:52,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:52,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:52,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:41:52,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:41:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:41:53,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622211031] [2020-09-24 21:41:53,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:53,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:41:53,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014382974] [2020-09-24 21:41:53,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:41:53,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:53,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:41:53,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:41:53,403 INFO L87 Difference]: Start difference. First operand 3017 states and 3661 transitions. Second operand 13 states. [2020-09-24 21:41:54,339 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-09-24 21:41:54,809 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-09-24 21:41:56,767 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-09-24 21:41:59,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:59,819 INFO L93 Difference]: Finished difference Result 8719 states and 11603 transitions. [2020-09-24 21:41:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 21:41:59,820 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 196 [2020-09-24 21:41:59,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:59,854 INFO L225 Difference]: With dead ends: 8719 [2020-09-24 21:41:59,855 INFO L226 Difference]: Without dead ends: 5397 [2020-09-24 21:41:59,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 21:41:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2020-09-24 21:42:00,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 4711. [2020-09-24 21:42:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4711 states. [2020-09-24 21:42:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4711 states to 4711 states and 5798 transitions. [2020-09-24 21:42:00,066 INFO L78 Accepts]: Start accepts. Automaton has 4711 states and 5798 transitions. Word has length 196 [2020-09-24 21:42:00,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:00,067 INFO L479 AbstractCegarLoop]: Abstraction has 4711 states and 5798 transitions. [2020-09-24 21:42:00,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:42:00,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4711 states and 5798 transitions. [2020-09-24 21:42:00,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-09-24 21:42:00,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:00,085 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:42:00,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:42:00,085 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:00,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:00,086 INFO L82 PathProgramCache]: Analyzing trace with hash 268527330, now seen corresponding path program 1 times [2020-09-24 21:42:00,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:00,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668296282] [2020-09-24 21:42:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:00,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:00,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:00,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:00,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:02,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:05,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:05,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:05,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-09-24 21:42:05,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:42:05,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-24 21:42:05,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:05,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:42:05,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 21:42:05,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-24 21:42:05,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:05,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:05,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:05,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:05,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:05,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:05,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:42:05,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:05,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:42:05,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:05,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:42:05,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:05,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:42:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:05,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking...