/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_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:42:52,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:42:52,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:42:52,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:42:52,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:42:52,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:42:52,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:42:52,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:42:52,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:42:52,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:42:52,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:42:52,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:42:52,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:42:52,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:42:52,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:42:52,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:42:52,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:42:52,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:42:52,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:42:53,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:42:53,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:42:53,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:42:53,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:42:53,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:42:53,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:42:53,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:42:53,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:42:53,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:42:53,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:42:53,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:42:53,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:42:53,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:42:53,023 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:42:53,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:42:53,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:42:53,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:42:53,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:42:53,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:42:53,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:42:53,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:42:53,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:42:53,031 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 21:42:53,077 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:42:53,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:42:53,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:42:53,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:42:53,080 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:42:53,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:42:53,081 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:42:53,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:42:53,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:42:53,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:42:53,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:42:53,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:42:53,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:42:53,084 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:42:53,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:42:53,084 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:42:53,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:42:53,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:42:53,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:42:53,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:42:53,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:42:53,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:42:53,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:42:53,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:42:53,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:42:53,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:42:53,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:42:53,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:42:53,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:42:53,087 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 21:42:53,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:42:53,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:42:53,579 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:42:53,581 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:42:53,581 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:42:53,583 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label35.c [2020-09-24 21:42:53,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66a0c699d/2a58a97417c5488a97dcd02d81a21acf/FLAGfa1b593cc [2020-09-24 21:42:54,328 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:42:54,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label35.c [2020-09-24 21:42:54,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66a0c699d/2a58a97417c5488a97dcd02d81a21acf/FLAGfa1b593cc [2020-09-24 21:42:54,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/66a0c699d/2a58a97417c5488a97dcd02d81a21acf [2020-09-24 21:42:54,567 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:42:54,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:42:54,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:42:54,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:42:54,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:42:54,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:54" (1/1) ... [2020-09-24 21:42:54,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a03fc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:54, skipping insertion in model container [2020-09-24 21:42:54,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:54" (1/1) ... [2020-09-24 21:42:54,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:42:54,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:42:55,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:42:55,075 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:42:55,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:42:55,302 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:42:55,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:55 WrapperNode [2020-09-24 21:42:55,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:42:55,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:42:55,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:42:55,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:42:55,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:55" (1/1) ... [2020-09-24 21:42:55,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:55" (1/1) ... [2020-09-24 21:42:55,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:55" (1/1) ... [2020-09-24 21:42:55,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:55" (1/1) ... [2020-09-24 21:42:55,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:55" (1/1) ... [2020-09-24 21:42:55,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:55" (1/1) ... [2020-09-24 21:42:55,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:55" (1/1) ... [2020-09-24 21:42:55,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:42:55,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:42:55,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:42:55,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:42:55,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:42:55,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:42:55,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:42:55,523 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:42:55,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:42:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:42:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:42:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:42:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:42:55,525 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:42:55,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:42:55,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:42:56,883 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:42:56,883 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:42:56,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:42:56 BoogieIcfgContainer [2020-09-24 21:42:56,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:42:56,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:42:56,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:42:56,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:42:56,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:42:54" (1/3) ... [2020-09-24 21:42:56,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5510976b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:42:56, skipping insertion in model container [2020-09-24 21:42:56,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:55" (2/3) ... [2020-09-24 21:42:56,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5510976b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:42:56, skipping insertion in model container [2020-09-24 21:42:56,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:42:56" (3/3) ... [2020-09-24 21:42:56,904 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label35.c [2020-09-24 21:42:56,919 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:42:56,932 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:42:56,959 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:42:56,999 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:42:56,999 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:42:56,999 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:42:56,999 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:42:56,999 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:42:57,000 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:42:57,000 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:42:57,000 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:42:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:42:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-09-24 21:42:57,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:57,057 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] [2020-09-24 21:42:57,057 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:57,066 INFO L82 PathProgramCache]: Analyzing trace with hash -691491799, now seen corresponding path program 1 times [2020-09-24 21:42:57,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:57,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136863733] [2020-09-24 21:42:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:57,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:57,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:57,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:57,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:59,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:59,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:02,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:02,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:02,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:02,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-09-24 21:43:02,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:43:02,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-09-24 21:43:02,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:02,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:43:02,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:02,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:43:02,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 21:43:02,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:02,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:03,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:03,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:03,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:03,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-24 21:43:03,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:03,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:03,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:03,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:03,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:03,313 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 21:43:03,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136863733] [2020-09-24 21:43:03,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:43:03,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-24 21:43:03,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58934131] [2020-09-24 21:43:03,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:43:03,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:03,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:43:03,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:43:03,347 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 17 states. [2020-09-24 21:43:03,710 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-09-24 21:43:03,877 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-09-24 21:43:04,101 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2020-09-24 21:43:04,317 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-09-24 21:43:04,519 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-09-24 21:43:04,921 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-09-24 21:43:05,205 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:43:05,660 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-09-24 21:43:06,654 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 21:43:06,878 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-09-24 21:43:07,064 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-09-24 21:43:07,396 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-09-24 21:43:08,056 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-09-24 21:43:08,467 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-09-24 21:43:08,663 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:43:09,557 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-09-24 21:43:09,951 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-09-24 21:43:12,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:12,166 INFO L93 Difference]: Finished difference Result 1860 states and 2652 transitions. [2020-09-24 21:43:12,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 21:43:12,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 120 [2020-09-24 21:43:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:12,199 INFO L225 Difference]: With dead ends: 1860 [2020-09-24 21:43:12,199 INFO L226 Difference]: Without dead ends: 1230 [2020-09-24 21:43:12,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=539, Invalid=1353, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 21:43:12,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2020-09-24 21:43:12,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1070. [2020-09-24 21:43:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-09-24 21:43:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1287 transitions. [2020-09-24 21:43:12,349 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1287 transitions. Word has length 120 [2020-09-24 21:43:12,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:12,349 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1287 transitions. [2020-09-24 21:43:12,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:43:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1287 transitions. [2020-09-24 21:43:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-24 21:43:12,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:12,361 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] [2020-09-24 21:43:12,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:43:12,362 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:12,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1366531083, now seen corresponding path program 1 times [2020-09-24 21:43:12,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:12,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323470227] [2020-09-24 21:43:12,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:12,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:12,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:12,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:14,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:14,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:14,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:14,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:15,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:17,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:17,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:17,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-09-24 21:43:17,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:43:17,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-24 21:43:17,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:17,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:43:17,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:43:17,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:43:17,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:18,215 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2020-09-24 21:43:18,363 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2020-09-24 21:43:18,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:18,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:18,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:18,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:18,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:18,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 21:43:18,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:18,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:18,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:18,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:18,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:18,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:18,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:18,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:18,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:43:18,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:18,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-24 21:43:18,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:18,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:43:18,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:18,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:43:18,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:19,106 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 21:43:19,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323470227] [2020-09-24 21:43:19,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:19,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:43:19,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561309654] [2020-09-24 21:43:19,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:43:19,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:19,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:43:19,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:43:19,111 INFO L87 Difference]: Start difference. First operand 1070 states and 1287 transitions. Second operand 19 states. [2020-09-24 21:43:20,107 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-09-24 21:43:20,393 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2020-09-24 21:43:20,923 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-09-24 21:43:21,241 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-09-24 21:43:21,505 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-09-24 21:43:22,208 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-09-24 21:43:22,546 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-09-24 21:43:23,053 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-09-24 21:43:23,200 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-09-24 21:43:23,521 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-09-24 21:43:23,861 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2020-09-24 21:43:24,840 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-09-24 21:43:25,597 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2020-09-24 21:43:26,068 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2020-09-24 21:43:27,152 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-09-24 21:43:27,901 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2020-09-24 21:43:28,424 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-09-24 21:43:28,938 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2020-09-24 21:43:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:30,976 INFO L93 Difference]: Finished difference Result 4081 states and 5455 transitions. [2020-09-24 21:43:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:43:30,978 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 142 [2020-09-24 21:43:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:31,004 INFO L225 Difference]: With dead ends: 4081 [2020-09-24 21:43:31,004 INFO L226 Difference]: Without dead ends: 3091 [2020-09-24 21:43:31,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=614, Invalid=1548, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 21:43:31,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2020-09-24 21:43:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 3017. [2020-09-24 21:43:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3017 states. [2020-09-24 21:43:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 3661 transitions. [2020-09-24 21:43:31,155 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 3661 transitions. Word has length 142 [2020-09-24 21:43:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:31,156 INFO L479 AbstractCegarLoop]: Abstraction has 3017 states and 3661 transitions. [2020-09-24 21:43:31,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:43:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 3661 transitions. [2020-09-24 21:43:31,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-24 21:43:31,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:31,170 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] [2020-09-24 21:43:31,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:43:31,170 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:31,171 INFO L82 PathProgramCache]: Analyzing trace with hash -820556042, now seen corresponding path program 1 times [2020-09-24 21:43:31,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:31,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037287100] [2020-09-24 21:43:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:31,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:31,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:31,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:31,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:31,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:31,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:32,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:33,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:33,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:33,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:34,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:34,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:34,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:35,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:36,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:36,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-24 21:43:36,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-09-24 21:43:36,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 21:43:36,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:36,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:43:36,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:43:36,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:43:36,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:36,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:36,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:36,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:36,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:36,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:36,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-24 21:43:36,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:36,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:36,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:36,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:36,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:36,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:36,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:36,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:36,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:36,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:43:36,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:43:36,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 21:43:36,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:36,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:36,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:36,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:43:36,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:36,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:43:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:36,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:36,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:36,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:36,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:43:36,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:43:36,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-24 21:43:36,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:36,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:36,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:36,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:43:36,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:43:36,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037287100] [2020-09-24 21:43:36,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:36,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:43:36,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273751763] [2020-09-24 21:43:36,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:43:36,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:36,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:43:36,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:43:36,879 INFO L87 Difference]: Start difference. First operand 3017 states and 3661 transitions. Second operand 13 states. [2020-09-24 21:43:42,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:42,214 INFO L93 Difference]: Finished difference Result 8641 states and 11435 transitions. [2020-09-24 21:43:42,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 21:43:42,214 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 155 [2020-09-24 21:43:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:42,245 INFO L225 Difference]: With dead ends: 8641 [2020-09-24 21:43:42,246 INFO L226 Difference]: Without dead ends: 5354 [2020-09-24 21:43:42,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:43:42,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5354 states. [2020-09-24 21:43:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5354 to 4714. [2020-09-24 21:43:42,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4714 states. [2020-09-24 21:43:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4714 states to 4714 states and 5833 transitions. [2020-09-24 21:43:42,405 INFO L78 Accepts]: Start accepts. Automaton has 4714 states and 5833 transitions. Word has length 155 [2020-09-24 21:43:42,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:42,405 INFO L479 AbstractCegarLoop]: Abstraction has 4714 states and 5833 transitions. [2020-09-24 21:43:42,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:43:42,405 INFO L276 IsEmpty]: Start isEmpty. Operand 4714 states and 5833 transitions. [2020-09-24 21:43:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-09-24 21:43:42,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:42,421 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:43:42,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:43:42,422 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:42,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:42,422 INFO L82 PathProgramCache]: Analyzing trace with hash 330636830, now seen corresponding path program 1 times [2020-09-24 21:43:42,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:42,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835678684] [2020-09-24 21:43:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:42,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:42,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:42,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:42,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:42,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking...