/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=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:27:05,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:27:05,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:27:05,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:27:05,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:27:05,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:27:05,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:27:05,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:27:05,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:27:05,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:27:05,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:27:05,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:27:05,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:27:05,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:27:05,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:27:05,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:27:05,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:27:05,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:27:05,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:27:05,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:27:05,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:27:05,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:27:05,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:27:05,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:27:05,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:27:05,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:27:05,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:27:05,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:27:05,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:27:05,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:27:05,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:27:05,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:27:05,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:27:05,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:27:05,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:27:05,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:27:05,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:27:05,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:27:05,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:27:05,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:27:05,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:27:05,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 03:27:06,020 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:27:06,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:27:06,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:27:06,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:27:06,022 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:27:06,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:27:06,022 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:27:06,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:27:06,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:27:06,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:27:06,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:27:06,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:27:06,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:27:06,024 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:27:06,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:27:06,024 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:27:06,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:27:06,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:27:06,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:27:06,025 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:27:06,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:27:06,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:27:06,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:27:06,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:27:06,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:27:06,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:27:06,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:27:06,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:27:06,027 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:27:06,027 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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;log-additional-information=true; [2020-09-25 03:27:06,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:27:06,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:27:06,511 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:27:06,512 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:27:06,513 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:27:06,514 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-09-25 03:27:06,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42113ce16/05770e8cc80c40dfbb1a36880336de95/FLAGa7c704468 [2020-09-25 03:27:07,110 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:27:07,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-09-25 03:27:07,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42113ce16/05770e8cc80c40dfbb1a36880336de95/FLAGa7c704468 [2020-09-25 03:27:07,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42113ce16/05770e8cc80c40dfbb1a36880336de95 [2020-09-25 03:27:07,457 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:27:07,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:27:07,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:27:07,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:27:07,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:27:07,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:27:07" (1/1) ... [2020-09-25 03:27:07,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df746a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:07, skipping insertion in model container [2020-09-25 03:27:07,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:27:07" (1/1) ... [2020-09-25 03:27:07,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:27:07,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:27:07,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:27:07,750 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:27:07,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:27:07,790 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:27:07,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:07 WrapperNode [2020-09-25 03:27:07,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:27:07,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:27:07,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:27:07,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:27:07,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:07" (1/1) ... [2020-09-25 03:27:07,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:07" (1/1) ... [2020-09-25 03:27:07,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:07" (1/1) ... [2020-09-25 03:27:07,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:07" (1/1) ... [2020-09-25 03:27:07,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:07" (1/1) ... [2020-09-25 03:27:07,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:07" (1/1) ... [2020-09-25 03:27:07,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:07" (1/1) ... [2020-09-25 03:27:07,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:27:07,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:27:07,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:27:07,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:27:07,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:27:08,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:27:08,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:27:08,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:27:08,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:27:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:27:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:27:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:27:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:27:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:27:08,187 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:27:08,187 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 03:27:08,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:27:08 BoogieIcfgContainer [2020-09-25 03:27:08,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:27:08,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:27:08,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:27:08,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:27:08,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:27:07" (1/3) ... [2020-09-25 03:27:08,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b7cf2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:27:08, skipping insertion in model container [2020-09-25 03:27:08,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:27:07" (2/3) ... [2020-09-25 03:27:08,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b7cf2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:27:08, skipping insertion in model container [2020-09-25 03:27:08,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:27:08" (3/3) ... [2020-09-25 03:27:08,202 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2020-09-25 03:27:08,214 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:27:08,224 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:27:08,245 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:27:08,277 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:27:08,278 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:27:08,278 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:27:08,278 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:27:08,278 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:27:08,278 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:27:08,279 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:27:08,279 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:27:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-09-25 03:27:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-25 03:27:08,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:08,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:08,309 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:08,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:08,317 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2020-09-25 03:27:08,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:08,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909646540] [2020-09-25 03:27:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:08,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:08,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:08,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:08,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 03:27:08,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:27:08,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-09-25 03:27:08,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:08,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 03:27:08,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:27:08,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 03:27:08,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 03:27:08,897 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-09-25 03:27:08,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:08,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:08,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:08,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:27:08,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:08,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:27:08,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:08,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:08,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:08,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:08,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:27:08,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909646540] [2020-09-25 03:27:08,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:27:08,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 03:27:08,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806510819] [2020-09-25 03:27:08,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 03:27:08,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:08,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 03:27:08,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 03:27:08,968 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-09-25 03:27:09,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:09,075 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-09-25 03:27:09,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 03:27:09,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-09-25 03:27:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:09,089 INFO L225 Difference]: With dead ends: 38 [2020-09-25 03:27:09,089 INFO L226 Difference]: Without dead ends: 14 [2020-09-25 03:27:09,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:27:09,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-25 03:27:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-09-25 03:27:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-25 03:27:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-09-25 03:27:09,139 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-09-25 03:27:09,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:09,139 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-09-25 03:27:09,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 03:27:09,139 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-09-25 03:27:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 03:27:09,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:09,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:09,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:27:09,141 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:09,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:09,142 INFO L82 PathProgramCache]: Analyzing trace with hash -355776516, now seen corresponding path program 1 times [2020-09-25 03:27:09,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:09,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340026300] [2020-09-25 03:27:09,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:09,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:09,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:09,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:09,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:09,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 03:27:09,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:27:09,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-09-25 03:27:09,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:09,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 03:27:09,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:27:09,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 03:27:09,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:09,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:09,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:09,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:09,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:27:09,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:09,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:27:09,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:09,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:09,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:27:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:27:09,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340026300] [2020-09-25 03:27:09,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:09,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 03:27:09,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310747316] [2020-09-25 03:27:09,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 03:27:09,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:09,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 03:27:09,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 03:27:09,795 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-09-25 03:27:09,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:09,853 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-09-25 03:27:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 03:27:09,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-09-25 03:27:09,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:09,855 INFO L225 Difference]: With dead ends: 21 [2020-09-25 03:27:09,855 INFO L226 Difference]: Without dead ends: 16 [2020-09-25 03:27:09,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 03:27:09,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-25 03:27:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-09-25 03:27:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-25 03:27:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-09-25 03:27:09,862 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-09-25 03:27:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:09,863 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-09-25 03:27:09,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 03:27:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-09-25 03:27:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 03:27:09,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:09,864 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:09,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:27:09,865 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:09,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:09,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1432978565, now seen corresponding path program 2 times [2020-09-25 03:27:09,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:09,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500213360] [2020-09-25 03:27:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:09,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:09,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:10,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:10,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:10,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 03:27:10,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:27:10,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-09-25 03:27:10,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:10,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 03:27:10,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:27:10,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 03:27:10,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:14,198 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-09-25 03:27:14,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:14,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:14,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:14,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:27:14,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:14,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 03:27:14,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:14,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:14,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:14,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:14,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:27:14,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500213360] [2020-09-25 03:27:14,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:14,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 03:27:14,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197929612] [2020-09-25 03:27:14,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 03:27:14,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:14,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 03:27:14,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 03:27:14,244 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-09-25 03:27:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:14,324 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-09-25 03:27:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 03:27:14,325 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-09-25 03:27:14,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:14,326 INFO L225 Difference]: With dead ends: 23 [2020-09-25 03:27:14,326 INFO L226 Difference]: Without dead ends: 18 [2020-09-25 03:27:14,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:27:14,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-25 03:27:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-09-25 03:27:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-25 03:27:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-25 03:27:14,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-09-25 03:27:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:14,333 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-25 03:27:14,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 03:27:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-25 03:27:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 03:27:14,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:27:14,335 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:27:14,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:27:14,335 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:27:14,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:27:14,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1537029318, now seen corresponding path program 3 times [2020-09-25 03:27:14,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:27:14,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522211071] [2020-09-25 03:27:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:27:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:14,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:14,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:14,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:14,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:14,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 03:27:14,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:27:14,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-09-25 03:27:14,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:14,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 03:27:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 03:27:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 03:27:14,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:16,934 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 54 DAG size of output: 12 [2020-09-25 03:27:16,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:27:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:27:16,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:27:16,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:27:16,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:27:16,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:27:16,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:27:16,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:27:16,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:27:16,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:27:16,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:27:16,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:27:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:27:16,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522211071] [2020-09-25 03:27:16,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:27:16,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 03:27:16,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262231886] [2020-09-25 03:27:16,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 03:27:16,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:27:16,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 03:27:16,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 03:27:16,976 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-09-25 03:27:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:27:17,060 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-09-25 03:27:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 03:27:17,060 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-09-25 03:27:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:27:17,062 INFO L225 Difference]: With dead ends: 18 [2020-09-25 03:27:17,062 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 03:27:17,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-25 03:27:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 03:27:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 03:27:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 03:27:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 03:27:17,063 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-09-25 03:27:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:27:17,064 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 03:27:17,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 03:27:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 03:27:17,065 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 03:27:17,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:27:17,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 03:27:17,183 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 03:27:17,183 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 03:27:17,184 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 03:27:17,184 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 03:27:17,184 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 03:27:17,184 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 03:27:17,184 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 18) the Hoare annotation is: true [2020-09-25 03:27:17,185 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 18) no Hoare annotation was computed. [2020-09-25 03:27:17,185 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 03:27:17,185 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 18) no Hoare annotation was computed. [2020-09-25 03:27:17,185 INFO L264 CegarLoopResult]: At program point L13-2(lines 13 15) the Hoare annotation is: (= main_~x~0 (let ((.cse0 (div main_~x~0 2))) (+ (* .cse0 2) (* (div (+ (* .cse0 (- 2)) main_~x~0) 4294967296) 4294967296)))) [2020-09-25 03:27:17,185 INFO L264 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (= main_~x~0 (let ((.cse0 (div main_~x~0 2))) (+ (* .cse0 2) (* (div (+ (* .cse0 (- 2)) main_~x~0) 4294967296) 4294967296)))) [2020-09-25 03:27:17,186 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-25 03:27:17,186 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-25 03:27:17,186 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-25 03:27:17,186 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-25 03:27:17,186 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-25 03:27:17,187 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-25 03:27:17,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 03:27:17 BoogieIcfgContainer [2020-09-25 03:27:17,213 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 03:27:17,215 INFO L168 Benchmark]: Toolchain (without parser) took 9756.35 ms. Allocated memory was 139.5 MB in the beginning and 235.4 MB in the end (delta: 95.9 MB). Free memory was 101.9 MB in the beginning and 111.1 MB in the end (delta: -9.1 MB). Peak memory consumption was 86.8 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:17,220 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 03:27:17,221 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.16 ms. Allocated memory is still 139.5 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:17,222 INFO L168 Benchmark]: Boogie Preprocessor took 121.15 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 181.5 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:17,226 INFO L168 Benchmark]: RCFGBuilder took 278.29 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 170.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:17,227 INFO L168 Benchmark]: TraceAbstraction took 9020.08 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 169.9 MB in the beginning and 111.1 MB in the end (delta: 58.8 MB). Peak memory consumption was 91.9 MB. Max. memory is 7.1 GB. [2020-09-25 03:27:17,235 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 327.16 ms. Allocated memory is still 139.5 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.15 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 181.5 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 278.29 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 170.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9020.08 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 169.9 MB in the beginning and 111.1 MB in the end (delta: 58.8 MB). Peak memory consumption was 91.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 13]: Loop Invariant Derived loop invariant: x == x / 2 * 2 + (x / 2 * -2 + x) / 4294967296 * 4294967296 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.7s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 20 SDslu, 131 SDs, 0 SdLazy, 124 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, 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, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 18 NumberOfFragments, 43 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 149 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 3842 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/14 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...