/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=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:29:20,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:29:20,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:29:20,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:29:20,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:29:20,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:29:20,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:29:20,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:29:20,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:29:20,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:29:20,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:29:20,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:29:20,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:29:20,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:29:20,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:29:20,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:29:20,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:29:20,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:29:20,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:29:20,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:29:20,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:29:20,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:29:20,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:29:20,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:29:20,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:29:20,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:29:20,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:29:20,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:29:20,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:29:20,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:29:20,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:29:20,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:29:20,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:29:20,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:29:20,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:29:20,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:29:20,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:29:20,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:29:20,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:29:20,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:29:20,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:29:20,463 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 18:29:20,511 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:29:20,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:29:20,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:29:20,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:29:20,513 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:29:20,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:29:20,514 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:29:20,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:29:20,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:29:20,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:29:20,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:29:20,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:29:20,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:29:20,517 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:29:20,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:29:20,517 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:29:20,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:29:20,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:29:20,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:29:20,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:29:20,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:29:20,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:29:20,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:29:20,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:29:20,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:29:20,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:29:20,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:29:20,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:29:20,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:29:20,520 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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;log-additional-information=true; [2020-09-24 18:29:20,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:29:20,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:29:21,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:29:21,003 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:29:21,004 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:29:21,005 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-2.i [2020-09-24 18:29:21,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73e855d2e/a306ef2d9a1e406a876ca20c49f2b74d/FLAG610d9d512 [2020-09-24 18:29:21,635 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:29:21,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-2.i [2020-09-24 18:29:21,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73e855d2e/a306ef2d9a1e406a876ca20c49f2b74d/FLAG610d9d512 [2020-09-24 18:29:21,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73e855d2e/a306ef2d9a1e406a876ca20c49f2b74d [2020-09-24 18:29:22,008 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:29:22,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:29:22,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:22,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:29:22,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:29:22,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:21" (1/1) ... [2020-09-24 18:29:22,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@243023c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22, skipping insertion in model container [2020-09-24 18:29:22,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:21" (1/1) ... [2020-09-24 18:29:22,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:29:22,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:29:22,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:22,292 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:29:22,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:22,331 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:29:22,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22 WrapperNode [2020-09-24 18:29:22,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:22,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:29:22,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:29:22,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:29:22,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... [2020-09-24 18:29:22,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:29:22,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:29:22,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:29:22,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:29:22,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:29:22,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:29:22,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:29:22,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 18:29:22,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:29:22,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:29:22,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 18:29:22,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:29:22,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:29:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:29:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:29:22,769 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:29:22,769 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:29:22,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:22 BoogieIcfgContainer [2020-09-24 18:29:22,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:29:22,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:29:22,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:29:22,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:29:22,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:29:21" (1/3) ... [2020-09-24 18:29:22,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aacea9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:22, skipping insertion in model container [2020-09-24 18:29:22,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:22" (2/3) ... [2020-09-24 18:29:22,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aacea9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:22, skipping insertion in model container [2020-09-24 18:29:22,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:22" (3/3) ... [2020-09-24 18:29:22,816 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-2.i [2020-09-24 18:29:22,848 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:29:22,862 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:29:22,895 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:29:22,926 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:29:22,927 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:29:22,927 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:29:22,927 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:29:22,927 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:29:22,928 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:29:22,928 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:29:22,928 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:29:22,951 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-09-24 18:29:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 18:29:22,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:22,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:22,960 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:22,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:22,967 INFO L82 PathProgramCache]: Analyzing trace with hash 2078788022, now seen corresponding path program 1 times [2020-09-24 18:29:22,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:22,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924497717] [2020-09-24 18:29:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:23,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:23,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:23,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:29:23,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:23,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-09-24 18:29:23,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:23,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:29:23,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 18:29:23,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 18:29:23,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:29:23,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:23,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:23,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:23,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:23,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:23,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 18:29:23,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:23,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:23,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:23,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:23,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:23,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924497717] [2020-09-24 18:29:23,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:23,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:29:23,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168356152] [2020-09-24 18:29:23,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:29:23,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:23,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:29:23,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:29:23,468 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-09-24 18:29:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:23,559 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-09-24 18:29:23,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:29:23,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 18:29:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:23,573 INFO L225 Difference]: With dead ends: 48 [2020-09-24 18:29:23,574 INFO L226 Difference]: Without dead ends: 23 [2020-09-24 18:29:23,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:29:23,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-24 18:29:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-24 18:29:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 18:29:23,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-24 18:29:23,631 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-24 18:29:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:23,632 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-24 18:29:23,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:29:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-24 18:29:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 18:29:23,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:23,634 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] [2020-09-24 18:29:23,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:29:23,635 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:23,636 INFO L82 PathProgramCache]: Analyzing trace with hash 493290783, now seen corresponding path program 1 times [2020-09-24 18:29:23,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:23,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32699192] [2020-09-24 18:29:23,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:23,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:23,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:23,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 18:29:23,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:23,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-09-24 18:29:23,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:23,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 18:29:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 18:29:23,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 18:29:23,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:24,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:24,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:24,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:24,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:24,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:24,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:29:24,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:24,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:24,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:24,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:24,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:29:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:24,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32699192] [2020-09-24 18:29:24,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:24,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 18:29:24,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068245693] [2020-09-24 18:29:24,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:29:24,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:24,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:29:24,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:29:24,369 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 11 states. [2020-09-24 18:29:24,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:24,723 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-09-24 18:29:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 18:29:24,723 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-09-24 18:29:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:24,725 INFO L225 Difference]: With dead ends: 33 [2020-09-24 18:29:24,725 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 18:29:24,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:29:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 18:29:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-09-24 18:29:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 18:29:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-24 18:29:24,744 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-24 18:29:24,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:24,744 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-24 18:29:24,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:29:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-24 18:29:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 18:29:24,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:24,747 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:24,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:29:24,747 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:24,748 INFO L82 PathProgramCache]: Analyzing trace with hash -194935978, now seen corresponding path program 2 times [2020-09-24 18:29:24,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:24,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168962418] [2020-09-24 18:29:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:24,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:25,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:25,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 18:29:25,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:25,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-09-24 18:29:25,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:25,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 18:29:25,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 18:29:25,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 18:29:25,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:25,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:25,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:25,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:25,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:25,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:25,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:25,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:25,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:25,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:25,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:25,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:25,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168962418] [2020-09-24 18:29:25,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:25,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 18:29:25,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104770192] [2020-09-24 18:29:25,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 18:29:25,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:25,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 18:29:25,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-24 18:29:25,308 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2020-09-24 18:29:25,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:25,772 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-09-24 18:29:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 18:29:25,773 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-24 18:29:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:25,775 INFO L225 Difference]: With dead ends: 37 [2020-09-24 18:29:25,775 INFO L226 Difference]: Without dead ends: 32 [2020-09-24 18:29:25,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-24 18:29:25,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-24 18:29:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-09-24 18:29:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 18:29:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-24 18:29:25,789 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-24 18:29:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:25,789 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-24 18:29:25,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 18:29:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-24 18:29:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 18:29:25,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:25,792 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:25,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:29:25,792 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:25,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:25,793 INFO L82 PathProgramCache]: Analyzing trace with hash -903852161, now seen corresponding path program 3 times [2020-09-24 18:29:25,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:25,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34639919] [2020-09-24 18:29:25,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:25,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:26,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:26,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 18:29:26,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:26,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-09-24 18:29:26,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 18:29:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 18:29:26,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 18:29:26,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:26,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:26,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:26,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:26,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:29:26,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:26,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:29:26,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:26,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:26,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:26,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:26,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 18:29:26,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34639919] [2020-09-24 18:29:26,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:26,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 18:29:26,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115944737] [2020-09-24 18:29:26,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 18:29:26,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:26,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 18:29:26,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:29:26,491 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 16 states. [2020-09-24 18:29:26,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:26,941 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-09-24 18:29:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 18:29:26,941 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-09-24 18:29:26,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:26,943 INFO L225 Difference]: With dead ends: 32 [2020-09-24 18:29:26,943 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 18:29:26,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2020-09-24 18:29:26,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 18:29:26,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 18:29:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 18:29:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 18:29:26,946 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-09-24 18:29:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:26,946 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 18:29:26,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 18:29:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 18:29:26,952 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 18:29:26,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:29:26,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 18:29:27,073 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 18:29:27,073 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 18:29:27,073 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 18:29:27,073 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 18:29:27,074 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 18:29:27,074 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 18:29:27,074 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-09-24 18:29:27,074 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-24 18:29:27,074 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-09-24 18:29:27,074 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 18) no Hoare annotation was computed. [2020-09-24 18:29:27,074 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-09-24 18:29:27,075 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-09-24 18:29:27,075 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-24 18:29:27,075 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-09-24 18:29:27,075 INFO L268 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-09-24 18:29:27,075 INFO L268 CegarLoopResult]: For program point L14-3(lines 14 16) no Hoare annotation was computed. [2020-09-24 18:29:27,075 INFO L268 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-09-24 18:29:27,076 INFO L268 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2020-09-24 18:29:27,076 INFO L268 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-09-24 18:29:27,076 INFO L268 CegarLoopResult]: For program point L14-5(line 14) no Hoare annotation was computed. [2020-09-24 18:29:27,076 INFO L264 CegarLoopResult]: At program point L14-6(lines 14 16) the Hoare annotation is: (let ((.cse3 (* 2 main_~i~0)) (.cse2 (+ main_~sn~0 2))) (let ((.cse0 (<= .cse3 .cse2)) (.cse1 (<= .cse2 .cse3))) (or (and (= main_~i~0 1) .cse0 .cse1) (and .cse0 .cse1 (< main_~sn~0 (+ (* 2 main_~n~0) 1)))))) [2020-09-24 18:29:27,077 INFO L264 CegarLoopResult]: At program point L14-7(lines 14 16) the Hoare annotation is: (or (= main_~sn~0 0) (= main_~sn~0 (* main_~n~0 2))) [2020-09-24 18:29:27,077 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2020-09-24 18:29:27,077 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2020-09-24 18:29:27,077 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-09-24 18:29:27,077 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-09-24 18:29:27,078 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-09-24 18:29:27,078 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2020-09-24 18:29:27,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:29:27 BoogieIcfgContainer [2020-09-24 18:29:27,101 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 18:29:27,105 INFO L168 Benchmark]: Toolchain (without parser) took 5094.21 ms. Allocated memory was 140.5 MB in the beginning and 245.9 MB in the end (delta: 105.4 MB). Free memory was 102.5 MB in the beginning and 195.5 MB in the end (delta: -93.0 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:27,106 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 18:29:27,107 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.09 ms. Allocated memory is still 140.5 MB. Free memory was 101.8 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:27,108 INFO L168 Benchmark]: Boogie Preprocessor took 122.20 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 92.4 MB in the beginning and 183.1 MB in the end (delta: -90.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:27,109 INFO L168 Benchmark]: RCFGBuilder took 321.26 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 170.8 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:27,110 INFO L168 Benchmark]: TraceAbstraction took 4308.13 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 170.1 MB in the beginning and 195.5 MB in the end (delta: -25.4 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:27,115 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.09 ms. Allocated memory is still 140.5 MB. Free memory was 101.8 MB in the beginning and 92.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.20 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 92.4 MB in the beginning and 183.1 MB in the end (delta: -90.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.26 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 170.8 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4308.13 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 170.1 MB in the beginning and 195.5 MB in the end (delta: -25.4 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 14]: Loop Invariant Derived loop invariant: ((i == 1 && 2 * i <= sn + 2) && sn + 2 <= 2 * i) || ((2 * i <= sn + 2 && sn + 2 <= 2 * i) && sn < 2 * n + 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 38 SDslu, 400 SDs, 0 SdLazy, 285 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=3, 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, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 18 NumberOfFragments, 55 HoareAnnotationTreeSize, 11 FomulaSimplifications, 112 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 22 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 16980 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 2/26 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...