/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --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_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:01:39,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:01:39,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:01:39,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:01:39,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:01:39,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:01:39,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:01:39,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:01:39,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:01:39,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:01:39,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:01:39,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:01:39,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:01:39,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:01:39,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:01:39,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:01:39,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:01:39,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:01:39,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:01:39,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:01:39,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:01:39,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:01:39,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:01:39,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:01:39,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:01:39,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:01:39,880 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:01:39,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:01:39,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:01:39,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:01:39,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:01:39,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:01:39,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:01:39,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:01:39,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:01:39,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:01:39,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:01:39,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:01:39,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:01:39,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:01:39,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:01:39,891 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 [2020-09-25 09:01:39,918 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:01:39,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:01:39,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:01:39,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:01:39,920 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:01:39,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:01:39,921 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:01:39,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:01:39,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:01:39,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:01:39,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:01:39,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:01:39,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:01:39,922 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:01:39,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:01:39,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:01:39,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:01:39,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:01:39,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:01:39,923 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:01:39,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:01:39,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:01:39,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:01:39,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:01:39,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:01:39,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:01:39,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:01:39,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:01:39,925 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:01:39,925 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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:01:40,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:01:40,435 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:01:40,441 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:01:40,443 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:01:40,445 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:01:40,446 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label01.c [2020-09-25 09:01:40,544 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3730740b8/8527166f8cc243c1aafbed271d3bd711/FLAGbb84ff6db [2020-09-25 09:01:41,197 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:01:41,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label01.c [2020-09-25 09:01:41,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3730740b8/8527166f8cc243c1aafbed271d3bd711/FLAGbb84ff6db [2020-09-25 09:01:41,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3730740b8/8527166f8cc243c1aafbed271d3bd711 [2020-09-25 09:01:41,465 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:01:41,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:01:41,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:01:41,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:01:41,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:01:41,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:01:41" (1/1) ... [2020-09-25 09:01:41,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790fb128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:01:41, skipping insertion in model container [2020-09-25 09:01:41,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:01:41" (1/1) ... [2020-09-25 09:01:41,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:01:41,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:01:41,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:01:42,003 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:01:42,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:01:42,279 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:01:42,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:01:42 WrapperNode [2020-09-25 09:01:42,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:01:42,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:01:42,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:01:42,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:01:42,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:01:42" (1/1) ... [2020-09-25 09:01:42,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:01:42" (1/1) ... [2020-09-25 09:01:42,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:01:42" (1/1) ... [2020-09-25 09:01:42,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:01:42" (1/1) ... [2020-09-25 09:01:42,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:01:42" (1/1) ... [2020-09-25 09:01:42,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:01:42" (1/1) ... [2020-09-25 09:01:42,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:01:42" (1/1) ... [2020-09-25 09:01:42,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:01:42,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:01:42,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:01:42,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:01:42,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:01:42" (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 [2020-09-25 09:01:42,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:01:42,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:01:42,492 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 09:01:42,492 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:01:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 09:01:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:01:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:01:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 09:01:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:01:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:01:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:01:43,879 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:01:43,880 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 09:01:43,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:01:43 BoogieIcfgContainer [2020-09-25 09:01:43,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:01:43,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:01:43,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:01:43,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:01:43,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:01:41" (1/3) ... [2020-09-25 09:01:43,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e43b5a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:01:43, skipping insertion in model container [2020-09-25 09:01:43,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:01:42" (2/3) ... [2020-09-25 09:01:43,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e43b5a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:01:43, skipping insertion in model container [2020-09-25 09:01:43,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:01:43" (3/3) ... [2020-09-25 09:01:43,899 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label01.c [2020-09-25 09:01:43,911 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:01:43,922 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:01:43,945 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:01:43,981 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:01:43,981 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:01:43,981 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:01:43,981 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:01:43,981 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:01:43,982 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:01:43,982 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:01:43,982 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:01:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 09:01:44,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-25 09:01:44,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:01:44,039 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] [2020-09-25 09:01:44,039 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:01:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:01:44,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1587967458, now seen corresponding path program 1 times [2020-09-25 09:01:44,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:01:44,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901706296] [2020-09-25 09:01:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:01:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:01:44,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:44,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:45,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:45,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:46,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:47,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:48,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:48,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:49,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:49,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:01:49,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-25 09:01:49,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 09:01:49,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 09:01:49,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:01:49,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:01:49,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:01:49,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 09:01:49,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-09-25 09:01:49,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:01:49,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:01:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:01:49,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:49,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:01:49,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:01:49,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:01:49,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-25 09:01:49,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:01:49,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:01:49,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:01:49,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:01:49,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 09:01:49,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:01:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:01:49,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901706296] [2020-09-25 09:01:49,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:01:49,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:01:49,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611336224] [2020-09-25 09:01:49,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:01:49,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:01:49,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:01:49,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:01:49,671 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 5 states. [2020-09-25 09:01:52,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:01:52,160 INFO L93 Difference]: Finished difference Result 1396 states and 1850 transitions. [2020-09-25 09:01:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:01:52,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2020-09-25 09:01:52,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:01:52,193 INFO L225 Difference]: With dead ends: 1396 [2020-09-25 09:01:52,193 INFO L226 Difference]: Without dead ends: 788 [2020-09-25 09:01:52,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:01:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-09-25 09:01:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 665. [2020-09-25 09:01:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2020-09-25 09:01:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 813 transitions. [2020-09-25 09:01:52,312 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 813 transitions. Word has length 139 [2020-09-25 09:01:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:01:52,314 INFO L479 AbstractCegarLoop]: Abstraction has 665 states and 813 transitions. [2020-09-25 09:01:52,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:01:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 813 transitions. [2020-09-25 09:01:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-25 09:01:52,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:01:52,325 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:01:52,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:01:52,325 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:01:52,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:01:52,326 INFO L82 PathProgramCache]: Analyzing trace with hash 366034702, now seen corresponding path program 1 times [2020-09-25 09:01:52,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:01:52,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503411418] [2020-09-25 09:01:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:01:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:01:52,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:52,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:52,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:52,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:53,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:53,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:54,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:54,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:57,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:01:57,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-25 09:01:57,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 09:01:57,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 09:01:57,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:01:57,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:01:57,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:01:57,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 09:01:57,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-09-25 09:01:57,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:01:57,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:01:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:01:57,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:57,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:01:57,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:01:57,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:01:57,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 09:01:57,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:01:57,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:01:57,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:01:57,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:01:57,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 09:01:57,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:01:57,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:01:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:01:57,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:57,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:57,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:01:57,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 09:01:57,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:01:57,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 09:01:57,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:01:57,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:01:57,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:01:57,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:01:57,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 09:01:57,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:01:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 09:01:57,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503411418] [2020-09-25 09:01:57,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:01:57,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 09:01:57,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115927717] [2020-09-25 09:01:57,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 09:01:57,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:01:57,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 09:01:57,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:01:57,694 INFO L87 Difference]: Start difference. First operand 665 states and 813 transitions. Second operand 6 states. [2020-09-25 09:01:59,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:01:59,679 INFO L93 Difference]: Finished difference Result 1625 states and 2085 transitions. [2020-09-25 09:01:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 09:01:59,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 157 [2020-09-25 09:01:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:01:59,688 INFO L225 Difference]: With dead ends: 1625 [2020-09-25 09:01:59,688 INFO L226 Difference]: Without dead ends: 982 [2020-09-25 09:01:59,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:01:59,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2020-09-25 09:01:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 970. [2020-09-25 09:01:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-09-25 09:01:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1235 transitions. [2020-09-25 09:01:59,738 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1235 transitions. Word has length 157 [2020-09-25 09:01:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:01:59,738 INFO L479 AbstractCegarLoop]: Abstraction has 970 states and 1235 transitions. [2020-09-25 09:01:59,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 09:01:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1235 transitions. [2020-09-25 09:01:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-09-25 09:01:59,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:01:59,745 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 09:01:59,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:01:59,745 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:01:59,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:01:59,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1889998438, now seen corresponding path program 1 times [2020-09-25 09:01:59,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:01:59,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358502578] [2020-09-25 09:01:59,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:01:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:01:59,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:01:59,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:00,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:00,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:01,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:01,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:04,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:02:04,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-25 09:02:04,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 09:02:04,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-25 09:02:04,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:02:04,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:02:04,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:02:04,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 09:02:04,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-09-25 09:02:04,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:02:04,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:02:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:02:04,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:04,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:02:04,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:02:04,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:02:04,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 09:02:04,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:02:04,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:02:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:02:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:02:04,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:02:04,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:02:04,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:02:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:02:04,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:05,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:02:05,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 09:02:05,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:02:05,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-25 09:02:05,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:02:05,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:02:05,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:02:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:02:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 09:02:05,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:02:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:02:05,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358502578] [2020-09-25 09:02:05,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:02:05,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 09:02:05,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084618154] [2020-09-25 09:02:05,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:02:05,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:02:05,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:02:05,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:02:05,174 INFO L87 Difference]: Start difference. First operand 970 states and 1235 transitions. Second operand 5 states. [2020-09-25 09:02:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:02:07,197 INFO L93 Difference]: Finished difference Result 2426 states and 3194 transitions. [2020-09-25 09:02:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:02:07,198 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 177 [2020-09-25 09:02:07,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:02:07,212 INFO L225 Difference]: With dead ends: 2426 [2020-09-25 09:02:07,212 INFO L226 Difference]: Without dead ends: 1478 [2020-09-25 09:02:07,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:02:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2020-09-25 09:02:07,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1428. [2020-09-25 09:02:07,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1428 states. [2020-09-25 09:02:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1754 transitions. [2020-09-25 09:02:07,293 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1754 transitions. Word has length 177 [2020-09-25 09:02:07,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:02:07,293 INFO L479 AbstractCegarLoop]: Abstraction has 1428 states and 1754 transitions. [2020-09-25 09:02:07,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:02:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1754 transitions. [2020-09-25 09:02:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-25 09:02:07,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:02:07,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:02:07,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:02:07,312 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:02:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:02:07,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1392969778, now seen corresponding path program 1 times [2020-09-25 09:02:07,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:02:07,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742718529] [2020-09-25 09:02:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:02:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:02:07,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:07,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:07,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:08,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:11,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:12,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:12,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:02:12,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-09-25 09:02:12,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 09:02:12,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 09:02:12,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:02:12,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:02:12,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:02:12,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 09:02:12,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-09-25 09:02:12,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:02:12,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:02:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:02:12,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:12,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:02:12,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:02:12,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:02:12,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 09:02:12,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:02:12,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:02:12,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:02:12,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:02:12,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:02:12,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:02:12,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:02:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:02:12,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:12,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:02:12,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 09:02:12,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:02:12,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 09:02:12,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:02:12,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:02:12,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 09:02:12,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:02:12,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 09:02:12,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:02:12,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 09:02:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:02:12,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:12,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:12,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:02:12,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 09:02:12,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:02:12,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-09-25 09:02:12,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:02:12,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:02:12,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:02:12,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 09:02:12,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 09:02:12,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:02:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 09:02:12,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742718529] [2020-09-25 09:02:12,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:02:12,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:02:12,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517082156] [2020-09-25 09:02:12,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:02:12,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:02:12,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:02:12,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:02:12,809 INFO L87 Difference]: Start difference. First operand 1428 states and 1754 transitions. Second operand 7 states. [2020-09-25 09:02:15,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:02:15,355 INFO L93 Difference]: Finished difference Result 3504 states and 4502 transitions. [2020-09-25 09:02:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 09:02:15,358 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 196 [2020-09-25 09:02:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:02:15,370 INFO L225 Difference]: With dead ends: 3504 [2020-09-25 09:02:15,370 INFO L226 Difference]: Without dead ends: 2098 [2020-09-25 09:02:15,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-25 09:02:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2020-09-25 09:02:15,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1920. [2020-09-25 09:02:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1920 states. [2020-09-25 09:02:15,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 2340 transitions. [2020-09-25 09:02:15,439 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 2340 transitions. Word has length 196 [2020-09-25 09:02:15,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:02:15,440 INFO L479 AbstractCegarLoop]: Abstraction has 1920 states and 2340 transitions. [2020-09-25 09:02:15,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:02:15,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 2340 transitions. [2020-09-25 09:02:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-25 09:02:15,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:02:15,449 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:02:15,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:02:15,449 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:02:15,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:02:15,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1631749271, now seen corresponding path program 1 times [2020-09-25 09:02:15,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:02:15,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931052646] [2020-09-25 09:02:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:02:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:02:15,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:15,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:15,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:15,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:17,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:20,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:02:20,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-09-25 09:02:20,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 09:02:20,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 09:02:20,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:02:20,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:02:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 09:02:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-09-25 09:02:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-09-25 09:02:20,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:02:20,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:02:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:02:20,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:20,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:02:20,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 09:02:20,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:02:20,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 09:02:20,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:02:20,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:02:20,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:02:20,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:02:20,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:02:20,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:02:20,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 09:02:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:02:20,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:20,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:02:20,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 09:02:20,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:02:20,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 09:02:20,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:02:20,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:02:20,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:02:20,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:02:20,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:02:20,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:02:20,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 09:02:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:02:20,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:20,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:02:20,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 09:02:20,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:02:20,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-09-25 09:02:20,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:02:20,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:02:20,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 09:02:20,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:02:20,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 09:02:20,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:02:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-25 09:02:21,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931052646] [2020-09-25 09:02:21,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:02:21,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 09:02:21,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358381160] [2020-09-25 09:02:21,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 09:02:21,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:02:21,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 09:02:21,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 09:02:21,067 INFO L87 Difference]: Start difference. First operand 1920 states and 2340 transitions. Second operand 8 states. [2020-09-25 09:02:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:02:23,997 INFO L93 Difference]: Finished difference Result 4230 states and 5330 transitions. [2020-09-25 09:02:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 09:02:23,998 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 201 [2020-09-25 09:02:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:02:24,011 INFO L225 Difference]: With dead ends: 4230 [2020-09-25 09:02:24,012 INFO L226 Difference]: Without dead ends: 2234 [2020-09-25 09:02:24,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-25 09:02:24,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-09-25 09:02:24,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2214. [2020-09-25 09:02:24,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2214 states. [2020-09-25 09:02:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 2663 transitions. [2020-09-25 09:02:24,119 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 2663 transitions. Word has length 201 [2020-09-25 09:02:24,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:02:24,120 INFO L479 AbstractCegarLoop]: Abstraction has 2214 states and 2663 transitions. [2020-09-25 09:02:24,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 09:02:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 2663 transitions. [2020-09-25 09:02:24,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-09-25 09:02:24,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:02:24,135 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:02:24,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:02:24,135 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:02:24,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:02:24,136 INFO L82 PathProgramCache]: Analyzing trace with hash 546258273, now seen corresponding path program 1 times [2020-09-25 09:02:24,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:02:24,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554857779] [2020-09-25 09:02:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:02:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:02:24,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:24,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:25,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:25,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:26,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:26,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:02:26,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking...