/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:07:35,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:07:35,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:07:35,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:07:35,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:07:35,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:07:35,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:07:35,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:07:35,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:07:35,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:07:35,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:07:35,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:07:35,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:07:35,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:07:35,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:07:35,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:07:35,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:07:35,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:07:35,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:07:35,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:07:35,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:07:35,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:07:35,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:07:35,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:07:35,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:07:35,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:07:35,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:07:35,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:07:35,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:07:35,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:07:35,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:07:35,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:07:35,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:07:35,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:07:35,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:07:35,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:07:35,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:07:35,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:07:35,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:07:35,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:07:35,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:07:35,976 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 [2020-10-12 16:07:35,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:07:35,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:07:35,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:07:36,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:07:36,000 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:07:36,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:07:36,000 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:07:36,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:07:36,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:07:36,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:07:36,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:07:36,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:07:36,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:07:36,001 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:07:36,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:07:36,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:07:36,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:07:36,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:07:36,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:07:36,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:07:36,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:07:36,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:07:36,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:07:36,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:07:36,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:07:36,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:07:36,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:07:36,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:07:36,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:07:36,004 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:07:36,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:07:36,328 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:07:36,332 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:07:36,333 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:07:36,334 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:07:36,335 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-10-12 16:07:36,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b42394d0/c84e1894823848b69b29d3f89b9a4cba/FLAGb0054376b [2020-10-12 16:07:36,874 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:07:36,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-10-12 16:07:36,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b42394d0/c84e1894823848b69b29d3f89b9a4cba/FLAGb0054376b [2020-10-12 16:07:37,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b42394d0/c84e1894823848b69b29d3f89b9a4cba [2020-10-12 16:07:37,226 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:07:37,228 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:07:37,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:07:37,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:07:37,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:07:37,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:07:37" (1/1) ... [2020-10-12 16:07:37,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ac3c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:07:37, skipping insertion in model container [2020-10-12 16:07:37,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:07:37" (1/1) ... [2020-10-12 16:07:37,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:07:37,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:07:37,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:07:37,437 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:07:37,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:07:37,470 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:07:37,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:07:37 WrapperNode [2020-10-12 16:07:37,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:07:37,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:07:37,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:07:37,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:07:37,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:07:37" (1/1) ... [2020-10-12 16:07:37,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:07:37" (1/1) ... [2020-10-12 16:07:37,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:07:37" (1/1) ... [2020-10-12 16:07:37,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:07:37" (1/1) ... [2020-10-12 16:07:37,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:07:37" (1/1) ... [2020-10-12 16:07:37,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:07:37" (1/1) ... [2020-10-12 16:07:37,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:07:37" (1/1) ... [2020-10-12 16:07:37,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:07:37,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:07:37,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:07:37,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:07:37,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:07:37" (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 [2020-10-12 16:07:37,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:07:37,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:07:37,661 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:07:37,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:07:37,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:07:37,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:07:37,662 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:07:37,662 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:07:37,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:07:37,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:07:37,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:07:37,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:07:37,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:07:37,839 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:07:37,839 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:07:37,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:07:37 BoogieIcfgContainer [2020-10-12 16:07:37,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:07:37,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:07:37,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:07:37,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:07:37,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:07:37" (1/3) ... [2020-10-12 16:07:37,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40582a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:07:37, skipping insertion in model container [2020-10-12 16:07:37,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:07:37" (2/3) ... [2020-10-12 16:07:37,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40582a4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:07:37, skipping insertion in model container [2020-10-12 16:07:37,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:07:37" (3/3) ... [2020-10-12 16:07:37,851 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-10-12 16:07:37,861 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:07:37,869 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:07:37,883 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:07:37,907 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:07:37,908 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:07:37,908 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:07:37,908 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:07:37,908 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:07:37,908 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:07:37,908 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:07:37,908 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:07:37,924 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-12 16:07:37,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:07:37,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:37,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:37,931 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:37,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:37,937 INFO L82 PathProgramCache]: Analyzing trace with hash 508025261, now seen corresponding path program 1 times [2020-10-12 16:07:37,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:37,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008139426] [2020-10-12 16:07:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:38,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:38,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:38,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:07:38,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:38,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-12 16:07:38,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:38,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:07:38,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:38,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:07:38,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:07:38,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:38,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:38,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:38,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:38,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:38,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:07:38,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:38,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:38,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:38,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:38,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:07:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:38,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008139426] [2020-10-12 16:07:38,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:07:38,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:07:38,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721830353] [2020-10-12 16:07:38,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:07:38,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:38,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:07:38,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:07:38,377 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-10-12 16:07:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:38,482 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-10-12 16:07:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:07:38,484 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-12 16:07:38,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:38,494 INFO L225 Difference]: With dead ends: 46 [2020-10-12 16:07:38,495 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:07:38,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:07:38,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:07:38,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-12 16:07:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 16:07:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-12 16:07:38,539 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2020-10-12 16:07:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:38,540 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-12 16:07:38,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:07:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-12 16:07:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:07:38,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:38,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:38,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:07:38,542 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:38,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:38,543 INFO L82 PathProgramCache]: Analyzing trace with hash -133512762, now seen corresponding path program 1 times [2020-10-12 16:07:38,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:38,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899142818] [2020-10-12 16:07:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:38,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:38,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:38,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:38,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:07:38,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:38,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-12 16:07:38,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:38,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:07:38,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:07:38,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:07:38,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:07:38,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:38,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:38,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:38,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:38,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:38,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:07:38,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:38,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:38,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:38,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:38,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:07:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:38,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899142818] [2020-10-12 16:07:38,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:07:38,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 16:07:38,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834404788] [2020-10-12 16:07:38,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:07:38,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:38,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:07:38,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:07:38,882 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-10-12 16:07:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:38,992 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2020-10-12 16:07:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:07:38,993 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-12 16:07:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:38,998 INFO L225 Difference]: With dead ends: 49 [2020-10-12 16:07:38,998 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 16:07:38,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:07:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 16:07:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2020-10-12 16:07:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:07:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-12 16:07:39,010 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 13 [2020-10-12 16:07:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:39,010 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-12 16:07:39,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:07:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-12 16:07:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:07:39,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:39,012 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:39,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:07:39,012 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:39,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1022031800, now seen corresponding path program 1 times [2020-10-12 16:07:39,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:39,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375087067] [2020-10-12 16:07:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:39,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:39,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:39,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:07:39,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:39,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-12 16:07:39,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:39,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:07:39,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:39,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:07:39,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:07:39,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:39,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:39,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:39,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:39,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:39,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:39,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:39,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:07:39,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 16:07:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:39,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:39,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:39,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:07:39,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:39,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 16:07:39,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:39,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:07:39,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:39,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:07:39,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:07:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:39,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375087067] [2020-10-12 16:07:39,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:07:39,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:07:39,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495461437] [2020-10-12 16:07:39,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:07:39,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:39,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:07:39,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:07:39,192 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2020-10-12 16:07:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:39,220 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-12 16:07:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:07:39,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-12 16:07:39,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:39,222 INFO L225 Difference]: With dead ends: 34 [2020-10-12 16:07:39,222 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 16:07:39,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:07:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 16:07:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-12 16:07:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:07:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-12 16:07:39,231 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2020-10-12 16:07:39,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:39,231 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-12 16:07:39,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:07:39,231 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-12 16:07:39,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:07:39,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:39,232 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:39,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:07:39,233 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:39,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:39,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2108248689, now seen corresponding path program 1 times [2020-10-12 16:07:39,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:39,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646500183] [2020-10-12 16:07:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:39,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:39,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:39,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:07:39,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:39,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-12 16:07:39,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:39,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:07:39,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:39,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:07:39,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:39,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:39,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:39,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:39,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:39,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:39,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:39,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:39,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:39,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:39,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:39,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:07:39,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646500183] [2020-10-12 16:07:39,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:39,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:07:39,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846285] [2020-10-12 16:07:39,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:07:39,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:39,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:07:39,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:07:39,377 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2020-10-12 16:07:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:39,440 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-12 16:07:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:07:39,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-12 16:07:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:39,442 INFO L225 Difference]: With dead ends: 32 [2020-10-12 16:07:39,442 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 16:07:39,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:07:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 16:07:39,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2020-10-12 16:07:39,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 16:07:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-12 16:07:39,449 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-10-12 16:07:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:39,449 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-12 16:07:39,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:07:39,450 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-12 16:07:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:07:39,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:39,451 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:39,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:07:39,451 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:39,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:39,452 INFO L82 PathProgramCache]: Analyzing trace with hash 996292415, now seen corresponding path program 1 times [2020-10-12 16:07:39,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:39,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042645942] [2020-10-12 16:07:39,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:39,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:39,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:39,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:39,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:07:39,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:07:39,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-12 16:07:39,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:39,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:07:39,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:07:39,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:07:39,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:39,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:39,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:39,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:39,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:39,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:39,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:39,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:39,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:39,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:39,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:39,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:39,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-12 16:07:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:39,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:39,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:39,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:07:39,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:39,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 16:07:39,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:07:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:07:39,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:07:39,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042645942] [2020-10-12 16:07:39,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:07:39,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:07:39,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544849827] [2020-10-12 16:07:39,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:07:39,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:39,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:07:39,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:07:39,662 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-12 16:07:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:39,744 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-12 16:07:39,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:07:39,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-12 16:07:39,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:39,746 INFO L225 Difference]: With dead ends: 38 [2020-10-12 16:07:39,747 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 16:07:39,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:07:39,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 16:07:39,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-10-12 16:07:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:07:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-12 16:07:39,759 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-12 16:07:39,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:39,759 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-12 16:07:39,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:07:39,759 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-12 16:07:39,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:07:39,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:07:39,760 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:07:39,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:07:39,761 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:07:39,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:07:39,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1301547432, now seen corresponding path program 2 times [2020-10-12 16:07:39,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:07:39,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311395442] [2020-10-12 16:07:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:07:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:39,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:39,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:39,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:07:39,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:39,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-12 16:07:39,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:39,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:07:39,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:07:39,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:07:39,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:39,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:07:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:39,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:39,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:39,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:07:39,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:39,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:07:39,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:39,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:07:39,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:39,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:07:39,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:07:39,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-12 16:07:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:07:39,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:07:39,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:07:39,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:07:39,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:07:39,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:07:39,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:07:39,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:07:39,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:07:39,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:07:39,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:07:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:07:39,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311395442] [2020-10-12 16:07:39,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:07:39,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 16:07:39,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152006607] [2020-10-12 16:07:39,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:07:39,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:07:39,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:07:39,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:07:39,869 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-10-12 16:07:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:07:39,925 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-10-12 16:07:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:07:39,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-12 16:07:39,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:07:39,926 INFO L225 Difference]: With dead ends: 26 [2020-10-12 16:07:39,926 INFO L226 Difference]: Without dead ends: 0 [2020-10-12 16:07:39,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:07:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-12 16:07:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-12 16:07:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-12 16:07:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-12 16:07:39,928 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-10-12 16:07:39,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:07:39,929 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-12 16:07:39,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:07:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-12 16:07:39,929 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-12 16:07:39,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:07:39,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-12 16:07:40,102 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-12 16:07:40,102 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-12 16:07:40,102 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-12 16:07:40,102 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-12 16:07:40,103 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-12 16:07:40,103 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-12 16:07:40,103 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-10-12 16:07:40,103 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-12 16:07:40,103 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-10-12 16:07:40,103 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-10-12 16:07:40,104 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-10-12 16:07:40,104 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 26) no Hoare annotation was computed. [2020-10-12 16:07:40,104 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-10-12 16:07:40,104 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (or (<= main_~m~0 0) (and (<= (+ main_~m~0 1) main_~n~0) (<= 0 main_~x~0))) [2020-10-12 16:07:40,104 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-12 16:07:40,105 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 20) no Hoare annotation was computed. [2020-10-12 16:07:40,105 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0))) (or (and .cse0 (= main_~m~0 0)) (and (<= 0 main_~m~0) (<= (+ main_~m~0 1) main_~n~0) .cse0))) [2020-10-12 16:07:40,105 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (+ main_~m~0 1))) (or (and .cse0 (<= .cse1 main_~n~0) (<= 0 main_~x~0)) (and (or .cse0 (and (<= main_~x~0 .cse1) (<= main_~n~0 .cse1))) (<= main_~m~0 0)))) [2020-10-12 16:07:40,105 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 26) no Hoare annotation was computed. [2020-10-12 16:07:40,106 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-10-12 16:07:40,106 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-12 16:07:40,106 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-12 16:07:40,106 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-12 16:07:40,106 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-10-12 16:07:40,106 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-10-12 16:07:40,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 04:07:40 BoogieIcfgContainer [2020-10-12 16:07:40,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 16:07:40,128 INFO L168 Benchmark]: Toolchain (without parser) took 2900.20 ms. Allocated memory was 147.3 MB in the beginning and 235.4 MB in the end (delta: 88.1 MB). Free memory was 102.8 MB in the beginning and 99.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 91.1 MB. Max. memory is 7.1 GB. [2020-10-12 16:07:40,129 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 16:07:40,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.67 ms. Allocated memory is still 147.3 MB. Free memory was 102.6 MB in the beginning and 93.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-10-12 16:07:40,131 INFO L168 Benchmark]: Boogie Preprocessor took 122.31 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.1 MB in the beginning and 182.6 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-10-12 16:07:40,132 INFO L168 Benchmark]: RCFGBuilder took 248.66 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 169.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-10-12 16:07:40,133 INFO L168 Benchmark]: TraceAbstraction took 2281.30 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 169.4 MB in the beginning and 99.8 MB in the end (delta: 69.6 MB). Peak memory consumption was 101.6 MB. Max. memory is 7.1 GB. [2020-10-12 16:07:40,137 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.67 ms. Allocated memory is still 147.3 MB. Free memory was 102.6 MB in the beginning and 93.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.31 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.1 MB in the beginning and 182.6 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 248.66 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 169.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2281.30 ms. Allocated memory was 203.4 MB in the beginning and 235.4 MB in the end (delta: 32.0 MB). Free memory was 169.4 MB in the beginning and 99.8 MB in the end (delta: 69.6 MB). Peak memory consumption was 101.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (0 <= x && m == 0) || ((0 <= m && m + 1 <= n) && 0 <= x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.0s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 97 SDtfs, 52 SDslu, 302 SDs, 0 SdLazy, 151 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 34 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 15 PreInvPairs, 24 NumberOfFragments, 70 HoareAnnotationTreeSize, 15 FomulaSimplifications, 294 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 57 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 2837 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 14/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...