/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_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:40:58,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:40:58,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:40:58,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:40:58,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:40:58,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:40:58,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:40:58,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:40:58,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:40:58,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:40:58,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:40:58,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:40:58,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:40:58,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:40:58,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:40:58,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:40:58,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:40:58,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:40:58,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:40:58,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:40:58,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:40:58,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:40:58,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:40:58,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:40:58,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:40:58,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:40:58,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:40:58,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:40:58,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:40:58,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 21:40:58,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:40:58,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:40:58,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:40:58,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:40:59,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:40:59,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:40:59,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:40:59,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:40:59,044 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:40:59,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:40:59,045 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:40:59,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:40:59,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:40:59,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:40:59,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:40:59,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:40:59,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:40:59,048 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:40:59,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:40:59,048 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:40:59,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:40:59,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:40:59,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:40:59,049 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:40:59,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:40:59,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:40:59,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:40:59,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:40:59,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:40:59,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:40:59,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:40:59,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:40:59,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:40:59,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:40:59,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:40:59,515 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:40:59,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:40:59,520 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:40:59,521 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:40:59,522 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label03.c [2020-09-24 21:40:59,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e36333cfa/688ee93ea64c44a6bc296613d9c69cbc/FLAG0dd9adf1f [2020-09-24 21:41:00,272 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:41:00,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label03.c [2020-09-24 21:41:00,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e36333cfa/688ee93ea64c44a6bc296613d9c69cbc/FLAG0dd9adf1f [2020-09-24 21:41:00,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e36333cfa/688ee93ea64c44a6bc296613d9c69cbc [2020-09-24 21:41:00,516 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:41:00,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:41:00,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:00,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:41:00,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:41:00,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:00" (1/1) ... [2020-09-24 21:41:00,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:00, skipping insertion in model container [2020-09-24 21:41:00,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:00" (1/1) ... [2020-09-24 21:41:00,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:41:00,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:41:01,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:01,091 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:41:01,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:01,329 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:41:01,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:01 WrapperNode [2020-09-24 21:41:01,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:01,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:41:01,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:41:01,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:41:01,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:01" (1/1) ... [2020-09-24 21:41:01,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:01" (1/1) ... [2020-09-24 21:41:01,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:01" (1/1) ... [2020-09-24 21:41:01,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:01" (1/1) ... [2020-09-24 21:41:01,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:01" (1/1) ... [2020-09-24 21:41:01,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:01" (1/1) ... [2020-09-24 21:41:01,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:01" (1/1) ... [2020-09-24 21:41:01,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:41:01,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:41:01,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:41:01,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:41:01,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:01" (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 21:41:01,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:41:01,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:41:01,517 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:41:01,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:41:01,517 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:41:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:41:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:41:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:41:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:41:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:41:01,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:41:02,934 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:41:02,935 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:41:02,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:02 BoogieIcfgContainer [2020-09-24 21:41:02,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:41:02,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:41:02,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:41:02,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:41:02,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:41:00" (1/3) ... [2020-09-24 21:41:02,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590b40ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:02, skipping insertion in model container [2020-09-24 21:41:02,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:01" (2/3) ... [2020-09-24 21:41:02,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590b40ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:02, skipping insertion in model container [2020-09-24 21:41:02,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:02" (3/3) ... [2020-09-24 21:41:02,956 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label03.c [2020-09-24 21:41:02,969 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:41:02,989 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:41:03,012 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:41:03,057 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:41:03,058 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:41:03,058 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:41:03,059 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:41:03,059 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:41:03,059 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:41:03,059 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:41:03,059 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:41:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:41:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-24 21:41:03,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:03,121 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] [2020-09-24 21:41:03,122 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:03,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:03,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1547939106, now seen corresponding path program 1 times [2020-09-24 21:41:03,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:03,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100677907] [2020-09-24 21:41:03,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:03,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:03,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:04,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:04,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:05,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:05,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:07,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:08,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:08,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:08,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:08,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:08,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-24 21:41:08,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:41:08,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-24 21:41:08,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:08,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:41:08,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:41:08,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:41:08,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:41:08,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:08,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:09,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:09,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:09,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:09,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-24 21:41:09,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:09,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:09,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:09,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:09,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:09,332 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 21:41:09,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100677907] [2020-09-24 21:41:09,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:41:09,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:41:09,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187612668] [2020-09-24 21:41:09,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:41:09,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:09,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:41:09,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:41:09,368 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:41:10,134 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-09-24 21:41:10,354 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-09-24 21:41:10,885 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-09-24 21:41:11,307 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-09-24 21:41:12,425 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-09-24 21:41:12,600 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-09-24 21:41:12,936 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-09-24 21:41:13,628 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-09-24 21:41:14,108 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-09-24 21:41:14,310 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:41:15,371 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-09-24 21:41:15,809 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-09-24 21:41:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:18,337 INFO L93 Difference]: Finished difference Result 1869 states and 2661 transitions. [2020-09-24 21:41:18,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:41:18,340 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 155 [2020-09-24 21:41:18,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:18,375 INFO L225 Difference]: With dead ends: 1869 [2020-09-24 21:41:18,376 INFO L226 Difference]: Without dead ends: 1239 [2020-09-24 21:41:18,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:41:18,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2020-09-24 21:41:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1076. [2020-09-24 21:41:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:41:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1293 transitions. [2020-09-24 21:41:18,528 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1293 transitions. Word has length 155 [2020-09-24 21:41:18,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:18,530 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1293 transitions. [2020-09-24 21:41:18,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:41:18,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1293 transitions. [2020-09-24 21:41:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-09-24 21:41:18,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:18,544 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] [2020-09-24 21:41:18,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:41:18,545 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1228267008, now seen corresponding path program 1 times [2020-09-24 21:41:18,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:18,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367342071] [2020-09-24 21:41:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:18,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:18,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:18,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:19,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:19,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:20,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:20,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:21,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:23,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:23,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-24 21:41:23,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:41:23,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:41:23,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:23,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:41:23,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:23,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:41:23,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-09-24 21:41:24,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:24,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:24,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:24,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:24,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:24,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-24 21:41:24,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:24,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:24,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:24,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:24,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:24,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:24,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:24,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:24,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:24,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:41:24,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:24,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-09-24 21:41:24,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:24,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:24,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:24,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:41:24,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:24,719 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 21:41:24,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367342071] [2020-09-24 21:41:24,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:24,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:41:24,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377208037] [2020-09-24 21:41:24,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:41:24,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:24,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:41:24,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:41:24,742 INFO L87 Difference]: Start difference. First operand 1076 states and 1293 transitions. Second operand 20 states. [2020-09-24 21:41:25,347 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:41:25,568 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-09-24 21:41:25,980 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-24 21:41:26,292 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-09-24 21:41:27,506 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:41:28,078 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:41:28,365 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-09-24 21:41:30,208 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-09-24 21:41:30,609 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-09-24 21:41:32,285 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-09-24 21:41:33,178 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-09-24 21:41:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:35,777 INFO L93 Difference]: Finished difference Result 4494 states and 6122 transitions. [2020-09-24 21:41:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-24 21:41:35,778 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 177 [2020-09-24 21:41:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:35,806 INFO L225 Difference]: With dead ends: 4494 [2020-09-24 21:41:35,807 INFO L226 Difference]: Without dead ends: 3498 [2020-09-24 21:41:35,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=923, Invalid=2499, Unknown=0, NotChecked=0, Total=3422 [2020-09-24 21:41:35,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2020-09-24 21:41:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3415. [2020-09-24 21:41:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3415 states. [2020-09-24 21:41:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 4138 transitions. [2020-09-24 21:41:35,983 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 4138 transitions. Word has length 177 [2020-09-24 21:41:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:35,984 INFO L479 AbstractCegarLoop]: Abstraction has 3415 states and 4138 transitions. [2020-09-24 21:41:35,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:41:35,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 4138 transitions. [2020-09-24 21:41:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-09-24 21:41:36,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:36,003 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] [2020-09-24 21:41:36,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:41:36,003 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:36,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1451102411, now seen corresponding path program 1 times [2020-09-24 21:41:36,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:36,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313031467] [2020-09-24 21:41:36,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:36,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:36,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:36,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:36,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:38,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:38,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:38,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:40,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:41,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:41,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-09-24 21:41:41,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:41:41,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 21:41:41,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:41,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:41:41,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:41:41,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:41:41,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:41,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:41,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:41,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:41,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:41,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:41,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 21:41:41,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:41,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:41,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:41,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:41,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:41,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:41,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:41,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:41,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:41:41,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:41,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 21:41:41,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:41,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:41:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:41,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:41:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:41,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:41,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:41,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:41,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:41:41,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:41,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-09-24 21:41:41,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:41,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:41,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:41,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:41:41,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:41:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:41:42,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313031467] [2020-09-24 21:41:42,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:42,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:41:42,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277096213] [2020-09-24 21:41:42,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:41:42,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:42,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:41:42,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:41:42,340 INFO L87 Difference]: Start difference. First operand 3415 states and 4138 transitions. Second operand 12 states. [2020-09-24 21:41:43,193 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-09-24 21:41:43,619 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-09-24 21:41:43,756 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-09-24 21:41:45,371 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-09-24 21:41:47,949 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-09-24 21:41:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:48,325 INFO L93 Difference]: Finished difference Result 9292 states and 12128 transitions. [2020-09-24 21:41:48,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 21:41:48,326 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 190 [2020-09-24 21:41:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:48,355 INFO L225 Difference]: With dead ends: 9292 [2020-09-24 21:41:48,355 INFO L226 Difference]: Without dead ends: 5604 [2020-09-24 21:41:48,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=247, Invalid=509, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:41:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2020-09-24 21:41:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 4957. [2020-09-24 21:41:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4957 states. [2020-09-24 21:41:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 6102 transitions. [2020-09-24 21:41:48,517 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 6102 transitions. Word has length 190 [2020-09-24 21:41:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:48,518 INFO L479 AbstractCegarLoop]: Abstraction has 4957 states and 6102 transitions. [2020-09-24 21:41:48,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:41:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 6102 transitions. [2020-09-24 21:41:48,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-09-24 21:41:48,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:48,537 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, 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] [2020-09-24 21:41:48,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:41:48,538 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:48,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:48,538 INFO L82 PathProgramCache]: Analyzing trace with hash -291901977, now seen corresponding path program 1 times [2020-09-24 21:41:48,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:48,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140177267] [2020-09-24 21:41:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:48,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:48,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking...