/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:46:58,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:46:58,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:46:58,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:46:58,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:46:58,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:46:58,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:46:58,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:46:58,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:46:58,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:46:58,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:46:58,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:46:58,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:46:58,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:46:58,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:46:58,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:46:58,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:46:58,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:46:58,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:46:58,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:46:58,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:46:58,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:46:58,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:46:58,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:46:58,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:46:58,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:46:58,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:46:58,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:46:58,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:46:58,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:46:58,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:46:58,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:46:58,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:46:58,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:46:58,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:46:58,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:46:58,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:46:58,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:46:58,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:46:58,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:46:58,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:46:58,059 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:46:58,089 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:46:58,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:46:58,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:46:58,095 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:46:58,095 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:46:58,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:46:58,096 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:46:58,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:46:58,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:46:58,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:46:58,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:46:58,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:46:58,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:46:58,098 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:46:58,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:46:58,099 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:46:58,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:46:58,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:46:58,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:46:58,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:46:58,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:46:58,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:46:58,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:46:58,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:46:58,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:46:58,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:46:58,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:46:58,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:46:58,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:46:58,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:46:58,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:46:58,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:46:58,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:46:58,447 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:46:58,448 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:46:58,449 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-10-13 10:46:58,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/412de9887/1f2571efa0394c3386eb46e883450820/FLAGf2dfe2c95 [2020-10-13 10:46:58,971 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:46:58,972 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-10-13 10:46:58,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/412de9887/1f2571efa0394c3386eb46e883450820/FLAGf2dfe2c95 [2020-10-13 10:46:59,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/412de9887/1f2571efa0394c3386eb46e883450820 [2020-10-13 10:46:59,388 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:46:59,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:46:59,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:46:59,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:46:59,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:46:59,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:46:59" (1/1) ... [2020-10-13 10:46:59,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bf15244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:59, skipping insertion in model container [2020-10-13 10:46:59,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:46:59" (1/1) ... [2020-10-13 10:46:59,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:46:59,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:46:59,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:46:59,624 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:46:59,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:46:59,659 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:46:59,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:59 WrapperNode [2020-10-13 10:46:59,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:46:59,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:46:59,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:46:59,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:46:59,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:59" (1/1) ... [2020-10-13 10:46:59,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:59" (1/1) ... [2020-10-13 10:46:59,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:59" (1/1) ... [2020-10-13 10:46:59,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:59" (1/1) ... [2020-10-13 10:46:59,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:59" (1/1) ... [2020-10-13 10:46:59,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:59" (1/1) ... [2020-10-13 10:46:59,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:59" (1/1) ... [2020-10-13 10:46:59,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:46:59,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:46:59,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:46:59,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:46:59,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:46:59,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:46:59,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:46:59,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:46:59,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:46:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:46:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:46:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:46:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:46:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:46:59,994 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:46:59,995 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:46:59,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:46:59 BoogieIcfgContainer [2020-10-13 10:46:59,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:47:00,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:47:00,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:47:00,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:47:00,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:46:59" (1/3) ... [2020-10-13 10:47:00,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746eea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:47:00, skipping insertion in model container [2020-10-13 10:47:00,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:59" (2/3) ... [2020-10-13 10:47:00,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746eea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:47:00, skipping insertion in model container [2020-10-13 10:47:00,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:46:59" (3/3) ... [2020-10-13 10:47:00,008 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2020-10-13 10:47:00,019 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:47:00,026 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:47:00,041 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:47:00,066 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:47:00,066 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:47:00,066 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:47:00,067 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:47:00,067 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:47:00,067 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:47:00,067 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:47:00,067 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:47:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-13 10:47:00,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:47:00,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:00,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:00,095 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:00,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:00,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-10-13 10:47:00,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:00,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868616271] [2020-10-13 10:47:00,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:00,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:00,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:00,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:00,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:00,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:47:00,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:00,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-13 10:47:00,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:00,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:47:00,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:00,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:47:00,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 10:47:00,793 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2020-10-13 10:47:00,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:00,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:00,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:00,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:00,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:00,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:47:00,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:00,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:00,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:00,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:00,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:00,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868616271] [2020-10-13 10:47:00,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:47:00,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:47:00,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825179614] [2020-10-13 10:47:00,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:47:00,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:00,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:47:00,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:47:00,851 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-10-13 10:47:00,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:00,879 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-13 10:47:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:47:00,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:47:00,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:00,890 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:47:00,890 INFO L226 Difference]: Without dead ends: 12 [2020-10-13 10:47:00,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:47:00,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-13 10:47:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-13 10:47:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-13 10:47:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-13 10:47:00,933 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-13 10:47:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:00,934 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-13 10:47:00,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:47:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-13 10:47:00,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-13 10:47:00,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:00,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:00,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:47:00,936 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:00,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:00,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-10-13 10:47:00,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:00,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58033026] [2020-10-13 10:47:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:00,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:01,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:47:01,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:01,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-13 10:47:01,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:01,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:47:01,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:01,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:47:01,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:01,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:01,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:01,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:01,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:01,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:47:01,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:01,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:01,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:01,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:01,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:01,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58033026] [2020-10-13 10:47:01,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:01,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:47:01,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923241830] [2020-10-13 10:47:01,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:47:01,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:01,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:47:01,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:47:01,328 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-10-13 10:47:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:01,353 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-13 10:47:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:47:01,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-13 10:47:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:01,356 INFO L225 Difference]: With dead ends: 18 [2020-10-13 10:47:01,356 INFO L226 Difference]: Without dead ends: 13 [2020-10-13 10:47:01,357 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 [2020-10-13 10:47:01,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-13 10:47:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-13 10:47:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 10:47:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-13 10:47:01,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-13 10:47:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:01,366 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-13 10:47:01,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:47:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-13 10:47:01,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:47:01,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:01,368 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:01,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:47:01,369 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:01,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-10-13 10:47:01,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:01,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205640601] [2020-10-13 10:47:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:01,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:01,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:47:01,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:01,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-13 10:47:01,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:01,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:47:01,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:01,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:47:01,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:01,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:01,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:01,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:01,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:01,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:01,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:01,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:01,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:01,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205640601] [2020-10-13 10:47:01,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:01,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:47:01,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765000801] [2020-10-13 10:47:01,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:47:01,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:01,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:47:01,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:47:01,672 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-10-13 10:47:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:01,693 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-13 10:47:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:47:01,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-13 10:47:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:01,695 INFO L225 Difference]: With dead ends: 19 [2020-10-13 10:47:01,695 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:47:01,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:47:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:47:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-13 10:47:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:47:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-13 10:47:01,701 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-13 10:47:01,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:01,701 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-13 10:47:01,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:47:01,702 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-13 10:47:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:47:01,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:01,702 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:01,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:47:01,703 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:01,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2020-10-13 10:47:01,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:01,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445501540] [2020-10-13 10:47:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:01,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:01,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:01,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:47:01,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:01,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-13 10:47:01,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:01,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:47:01,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:01,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:47:01,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:02,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:02,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:02,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:02,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:02,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:02,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:02,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:02,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:02,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:02,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445501540] [2020-10-13 10:47:02,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:02,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:47:02,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313666878] [2020-10-13 10:47:02,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:47:02,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:02,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:47:02,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:47:02,037 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-10-13 10:47:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:02,076 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-13 10:47:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:47:02,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-13 10:47:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:02,078 INFO L225 Difference]: With dead ends: 20 [2020-10-13 10:47:02,078 INFO L226 Difference]: Without dead ends: 15 [2020-10-13 10:47:02,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:47:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-13 10:47:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-13 10:47:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:47:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-13 10:47:02,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-13 10:47:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:02,094 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-13 10:47:02,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:47:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-13 10:47:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:47:02,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:02,096 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:02,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:47:02,097 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:02,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:02,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2020-10-13 10:47:02,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:02,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27382319] [2020-10-13 10:47:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:02,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:02,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:47:02,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:02,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-13 10:47:02,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:47:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:47:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:47:02,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:02,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:02,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:02,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:02,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:02,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:02,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:02,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:02,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:02,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:02,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:47:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:47:02,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27382319] [2020-10-13 10:47:02,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:47:02,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:47:02,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605809586] [2020-10-13 10:47:02,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:47:02,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:02,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:47:02,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:47:02,450 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-10-13 10:47:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:02,486 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-13 10:47:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:47:02,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-13 10:47:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:02,487 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:47:02,488 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:47:02,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:47:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:47:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-13 10:47:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 10:47:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-13 10:47:02,494 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-13 10:47:02,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:02,494 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-13 10:47:02,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:47:02,495 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-13 10:47:02,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:47:02,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:47:02,495 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:47:02,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:47:02,496 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:47:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:47:02,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2020-10-13 10:47:02,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:47:02,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806881376] [2020-10-13 10:47:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:47:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:02,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:02,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:47:02,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:47:02,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-13 10:47:02,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:02,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:47:02,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:47:02,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:47:02,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:02,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:47:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:47:02,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:47:02,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:47:02,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:47:02,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:47:02,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:47:02,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:47:02,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:47:02,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:47:02,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:47:02,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:47:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 10:47:02,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806881376] [2020-10-13 10:47:02,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:47:02,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:47:02,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288436854] [2020-10-13 10:47:02,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:47:02,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:47:02,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:47:02,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:47:02,751 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-10-13 10:47:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:47:02,776 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-10-13 10:47:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:47:02,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-13 10:47:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:47:02,776 INFO L225 Difference]: With dead ends: 16 [2020-10-13 10:47:02,777 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 10:47:02,777 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 [2020-10-13 10:47:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 10:47:02,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 10:47:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 10:47:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 10:47:02,778 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-10-13 10:47:02,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:47:02,779 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 10:47:02,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:47:02,779 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 10:47:02,779 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 10:47:02,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:47:02,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 10:47:02,816 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-13 10:47:02,816 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:47:02,817 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:47:02,817 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 10:47:02,817 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 10:47:02,817 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 10:47:02,817 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 18) the Hoare annotation is: true [2020-10-13 10:47:02,817 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 18) no Hoare annotation was computed. [2020-10-13 10:47:02,817 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 18) no Hoare annotation was computed. [2020-10-13 10:47:02,818 INFO L264 CegarLoopResult]: At program point L13-2(lines 13 15) the Hoare annotation is: (= main_~x~0 (* (div main_~x~0 2) 2)) [2020-10-13 10:47:02,818 INFO L264 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (= main_~x~0 (* 2 (div main_~x~0 2))) [2020-10-13 10:47:02,818 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-10-13 10:47:02,818 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-10-13 10:47:02,818 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-13 10:47:02,818 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-10-13 10:47:02,818 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-13 10:47:02,819 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-10-13 10:47:02,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:47:02 BoogieIcfgContainer [2020-10-13 10:47:02,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:47:02,839 INFO L168 Benchmark]: Toolchain (without parser) took 3449.96 ms. Allocated memory was 140.0 MB in the beginning and 245.9 MB in the end (delta: 105.9 MB). Free memory was 103.5 MB in the beginning and 167.6 MB in the end (delta: -64.1 MB). Peak memory consumption was 41.8 MB. Max. memory is 7.1 GB. [2020-10-13 10:47:02,840 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-13 10:47:02,841 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.78 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-10-13 10:47:02,842 INFO L168 Benchmark]: Boogie Preprocessor took 116.40 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 180.9 MB in the end (delta: -87.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-10-13 10:47:02,843 INFO L168 Benchmark]: RCFGBuilder took 221.47 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 170.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-10-13 10:47:02,844 INFO L168 Benchmark]: TraceAbstraction took 2836.82 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 169.5 MB in the beginning and 167.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. [2020-10-13 10:47:02,848 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.78 ms. Allocated memory is still 140.0 MB. Free memory was 103.1 MB in the beginning and 93.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.40 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 180.9 MB in the end (delta: -87.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 221.47 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 170.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2836.82 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 169.5 MB in the beginning and 167.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 45.4 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.7s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 1 SDslu, 134 SDs, 0 SdLazy, 68 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 18 NumberOfFragments, 19 HoareAnnotationTreeSize, 12 FomulaSimplifications, 93 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 2111 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 15/35 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...