/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --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 04:35:16,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:35:16,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:35:16,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:35:16,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:35:16,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:35:16,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:35:16,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:35:16,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:35:16,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:35:16,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:35:16,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:35:16,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:35:16,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:35:16,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:35:16,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:35:16,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:35:16,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:35:16,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:35:16,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:35:16,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:35:16,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:35:16,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:35:16,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:35:16,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:35:16,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:35:16,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:35:16,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:35:16,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:35:16,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:35:16,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:35:16,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:35:16,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:35:16,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:35:16,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:35:16,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:35:16,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:35:16,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:35:16,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:35:16,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:35:16,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:35:16,996 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 04:35:17,044 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:35:17,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:35:17,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:35:17,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:35:17,048 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:35:17,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:35:17,048 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:35:17,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:35:17,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:35:17,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:35:17,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:35:17,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:35:17,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:35:17,051 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:35:17,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:35:17,051 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:35:17,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:35:17,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:35:17,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:35:17,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:35:17,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:35:17,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:35:17,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:35:17,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:35:17,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:35:17,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:35:17,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:35:17,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:35:17,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:35:17,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-09-25 04:35:17,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:35:17,584 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:35:17,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:35:17,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:35:17,592 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:35:17,593 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-09-25 04:35:17,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20747a951/060b9fb92112470487e8455b05b7d4e3/FLAG9f08cf3dd [2020-09-25 04:35:18,253 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:35:18,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-09-25 04:35:18,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20747a951/060b9fb92112470487e8455b05b7d4e3/FLAG9f08cf3dd [2020-09-25 04:35:18,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20747a951/060b9fb92112470487e8455b05b7d4e3 [2020-09-25 04:35:18,592 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:35:18,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:35:18,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:35:18,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:35:18,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:35:18,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:35:18" (1/1) ... [2020-09-25 04:35:18,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c489c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:18, skipping insertion in model container [2020-09-25 04:35:18,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:35:18" (1/1) ... [2020-09-25 04:35:18,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:35:18,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:35:18,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:35:18,884 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:35:18,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:35:18,925 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:35:18,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:18 WrapperNode [2020-09-25 04:35:18,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:35:18,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:35:18,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:35:18,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:35:18,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:18" (1/1) ... [2020-09-25 04:35:18,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:18" (1/1) ... [2020-09-25 04:35:18,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:18" (1/1) ... [2020-09-25 04:35:18,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:18" (1/1) ... [2020-09-25 04:35:18,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:18" (1/1) ... [2020-09-25 04:35:18,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:18" (1/1) ... [2020-09-25 04:35:18,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:18" (1/1) ... [2020-09-25 04:35:19,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:35:19,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:35:19,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:35:19,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:35:19,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:18" (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 04:35:19,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:35:19,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:35:19,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 04:35:19,147 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:35:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:35:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 04:35:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:35:19,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:35:19,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:35:19,340 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:35:19,340 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 04:35:19,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:35:19 BoogieIcfgContainer [2020-09-25 04:35:19,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:35:19,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:35:19,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:35:19,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:35:19,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:35:18" (1/3) ... [2020-09-25 04:35:19,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143b3863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:35:19, skipping insertion in model container [2020-09-25 04:35:19,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:18" (2/3) ... [2020-09-25 04:35:19,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143b3863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:35:19, skipping insertion in model container [2020-09-25 04:35:19,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:35:19" (3/3) ... [2020-09-25 04:35:19,359 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2020-09-25 04:35:19,368 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:35:19,378 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:35:19,397 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:35:19,426 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:35:19,426 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:35:19,426 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:35:19,426 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:35:19,426 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:35:19,427 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:35:19,427 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:35:19,427 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:35:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-09-25 04:35:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-25 04:35:19,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:19,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:19,454 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:19,462 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2020-09-25 04:35:19,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:19,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984257653] [2020-09-25 04:35:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:19,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:19,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:19,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:19,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 04:35:19,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:35:19,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-09-25 04:35:19,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:19,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:19,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:19,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 04:35:19,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:19,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 04:35:19,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:19,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:19,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:19,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:19,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:19,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:35:19,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:19,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:19,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:19,776 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 04:35:19,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984257653] [2020-09-25 04:35:19,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:19,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 04:35:19,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169722048] [2020-09-25 04:35:19,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 04:35:19,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:19,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 04:35:19,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 04:35:19,803 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-09-25 04:35:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:19,827 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-09-25 04:35:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 04:35:19,828 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-25 04:35:19,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:19,838 INFO L225 Difference]: With dead ends: 29 [2020-09-25 04:35:19,839 INFO L226 Difference]: Without dead ends: 12 [2020-09-25 04:35:19,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 04:35:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-09-25 04:35:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-09-25 04:35:19,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-09-25 04:35:19,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-09-25 04:35:19,884 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-09-25 04:35:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:19,884 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-09-25 04:35:19,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 04:35:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-09-25 04:35:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-25 04:35:19,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:19,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:19,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:35:19,886 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:19,886 INFO L82 PathProgramCache]: Analyzing trace with hash -14991171, now seen corresponding path program 1 times [2020-09-25 04:35:19,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:19,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155318161] [2020-09-25 04:35:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:19,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:19,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:20,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:20,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:20,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 04:35:20,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:35:20,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-09-25 04:35:20,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:20,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:20,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:20,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 04:35:20,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 04:35:20,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:20,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:20,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:20,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:20,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:20,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:20,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:35:20,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:20,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:20,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:20,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:20,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:20,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:20,207 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 04:35:20,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155318161] [2020-09-25 04:35:20,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:20,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 04:35:20,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12004937] [2020-09-25 04:35:20,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 04:35:20,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:20,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 04:35:20,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 04:35:20,216 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2020-09-25 04:35:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:20,310 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-09-25 04:35:20,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 04:35:20,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-25 04:35:20,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:20,314 INFO L225 Difference]: With dead ends: 19 [2020-09-25 04:35:20,314 INFO L226 Difference]: Without dead ends: 14 [2020-09-25 04:35:20,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 04:35:20,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-25 04:35:20,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-09-25 04:35:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-25 04:35:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-09-25 04:35:20,331 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-09-25 04:35:20,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:20,331 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-09-25 04:35:20,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 04:35:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-09-25 04:35:20,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 04:35:20,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:20,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:20,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:35:20,333 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:20,334 INFO L82 PathProgramCache]: Analyzing trace with hash -355776516, now seen corresponding path program 1 times [2020-09-25 04:35:20,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:20,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55517496] [2020-09-25 04:35:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:20,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:20,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:20,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:20,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:20,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 04:35:20,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:35:20,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-09-25 04:35:20,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:20,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:20,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 04:35:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 04:35:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 04:35:20,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:20,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:20,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:20,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:20,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:20,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:20,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:35:20,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:20,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:20,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:20,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:20,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:20,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:20,720 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 04:35:20,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55517496] [2020-09-25 04:35:20,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:35:20,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-25 04:35:20,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287207739] [2020-09-25 04:35:20,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 04:35:20,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:20,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 04:35:20,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:35:20,725 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-09-25 04:35:20,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:20,762 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-09-25 04:35:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 04:35:20,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-09-25 04:35:20,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:20,764 INFO L225 Difference]: With dead ends: 21 [2020-09-25 04:35:20,764 INFO L226 Difference]: Without dead ends: 16 [2020-09-25 04:35:20,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:35:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-25 04:35:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-09-25 04:35:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-25 04:35:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-09-25 04:35:20,776 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-09-25 04:35:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:20,776 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-09-25 04:35:20,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 04:35:20,776 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-09-25 04:35:20,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 04:35:20,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:20,777 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:20,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:35:20,778 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:20,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1432978565, now seen corresponding path program 2 times [2020-09-25 04:35:20,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:20,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184076989] [2020-09-25 04:35:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:20,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:20,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:21,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:21,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:21,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 04:35:21,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:35:21,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-09-25 04:35:21,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:21,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:21,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:35:21,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 04:35:21,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:21,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:21,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:21,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:21,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:21,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:21,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:21,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:35:21,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:21,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:21,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:21,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:21,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:21,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 04:35:21,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184076989] [2020-09-25 04:35:21,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:21,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 04:35:21,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356974752] [2020-09-25 04:35:21,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:35:21,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:21,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:35:21,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:35:21,215 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-09-25 04:35:21,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:21,247 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-09-25 04:35:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 04:35:21,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-25 04:35:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:21,248 INFO L225 Difference]: With dead ends: 15 [2020-09-25 04:35:21,248 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 04:35:21,249 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 [2020-09-25 04:35:21,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 04:35:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 04:35:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 04:35:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 04:35:21,250 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-09-25 04:35:21,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:21,250 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 04:35:21,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:35:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 04:35:21,251 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 04:35:21,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 04:35:21,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 04:35:21,287 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 04:35:21,287 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 04:35:21,287 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 04:35:21,288 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 04:35:21,288 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 04:35:21,288 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 04:35:21,288 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 18) the Hoare annotation is: true [2020-09-25 04:35:21,288 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 18) no Hoare annotation was computed. [2020-09-25 04:35:21,288 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 04:35:21,289 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 18) no Hoare annotation was computed. [2020-09-25 04:35:21,289 INFO L271 CegarLoopResult]: At program point L13-2(lines 13 15) the Hoare annotation is: true [2020-09-25 04:35:21,289 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 (* 2147483648 (div (+ (* .cse0 (- 2)) main_~x~0) 4294967296)) (* 2147483648 (div main_~x~0 4294967296))))) [2020-09-25 04:35:21,289 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-25 04:35:21,290 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-25 04:35:21,290 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-25 04:35:21,290 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-25 04:35:21,290 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-25 04:35:21,290 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-25 04:35:21,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 04:35:21 BoogieIcfgContainer [2020-09-25 04:35:21,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 04:35:21,306 INFO L168 Benchmark]: Toolchain (without parser) took 2711.05 ms. Allocated memory was 146.3 MB in the beginning and 235.9 MB in the end (delta: 89.7 MB). Free memory was 102.2 MB in the beginning and 181.5 MB in the end (delta: -79.3 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-25 04:35:21,307 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 04:35:21,308 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.38 ms. Allocated memory is still 146.3 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 04:35:21,309 INFO L168 Benchmark]: Boogie Preprocessor took 125.77 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 183.3 MB in the end (delta: -91.0 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-09-25 04:35:21,310 INFO L168 Benchmark]: RCFGBuilder took 294.87 ms. Allocated memory is still 203.4 MB. Free memory was 183.3 MB in the beginning and 171.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-09-25 04:35:21,311 INFO L168 Benchmark]: TraceAbstraction took 1952.11 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 170.8 MB in the beginning and 181.5 MB in the end (delta: -10.7 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-09-25 04:35:21,315 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 329.38 ms. Allocated memory is still 146.3 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.77 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 183.3 MB in the end (delta: -91.0 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 294.87 ms. Allocated memory is still 203.4 MB. Free memory was 183.3 MB in the beginning and 171.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1952.11 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 170.8 MB in the beginning and 181.5 MB in the end (delta: -10.7 MB). Peak memory consumption was 21.8 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: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 47 SDtfs, 4 SDslu, 46 SDs, 0 SdLazy, 18 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 13 NumberOfFragments, 28 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1095 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 4/5 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...