/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:35:09,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:35:09,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:35:09,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:35:09,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:35:09,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:35:09,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:35:09,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:35:09,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:35:09,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:35:09,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:35:09,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:35:09,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:35:09,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:35:09,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:35:09,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:35:09,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:35:09,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:35:09,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:35:09,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:35:09,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:35:09,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:35:09,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:35:09,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:35:09,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:35:09,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:35:09,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:35:09,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:35:09,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:35:09,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:35:09,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:35:09,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:35:09,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:35:09,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:35:09,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:35:09,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:35:09,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:35:09,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:35:09,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:35:09,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:35:09,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:35:09,363 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 19:35:09,416 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:35:09,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:35:09,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:35:09,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:35:09,420 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:35:09,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:35:09,421 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:35:09,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:35:09,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:35:09,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:35:09,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:35:09,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:35:09,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:35:09,426 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:35:09,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:35:09,426 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:35:09,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:35:09,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:35:09,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:35:09,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:35:09,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:35:09,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:35:09,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:35:09,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:35:09,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:35:09,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:35:09,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:35:09,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:35:09,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:35:09,431 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:35:09,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:35:09,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:35:09,910 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:35:09,912 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:35:09,912 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:35:09,914 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-09-24 19:35:09,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b236a831/1e3795d27bd24dcdb0205e4dcf03482c/FLAGbd97659ee [2020-09-24 19:35:10,551 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:35:10,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/half.i [2020-09-24 19:35:10,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b236a831/1e3795d27bd24dcdb0205e4dcf03482c/FLAGbd97659ee [2020-09-24 19:35:10,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b236a831/1e3795d27bd24dcdb0205e4dcf03482c [2020-09-24 19:35:10,944 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:35:10,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:35:10,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:35:10,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:35:10,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:35:10,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:35:10" (1/1) ... [2020-09-24 19:35:10,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334cbd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:10, skipping insertion in model container [2020-09-24 19:35:10,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:35:10" (1/1) ... [2020-09-24 19:35:10,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:35:11,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:35:11,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:35:11,226 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:35:11,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:35:11,265 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:35:11,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:11 WrapperNode [2020-09-24 19:35:11,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:35:11,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:35:11,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:35:11,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:35:11,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:11" (1/1) ... [2020-09-24 19:35:11,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:11" (1/1) ... [2020-09-24 19:35:11,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:11" (1/1) ... [2020-09-24 19:35:11,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:11" (1/1) ... [2020-09-24 19:35:11,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:11" (1/1) ... [2020-09-24 19:35:11,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:11" (1/1) ... [2020-09-24 19:35:11,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:11" (1/1) ... [2020-09-24 19:35:11,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:35:11,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:35:11,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:35:11,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:35:11,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:35:11,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:35:11,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:35:11,466 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 19:35:11,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 19:35:11,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:35:11,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:35:11,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 19:35:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 19:35:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 19:35:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 19:35:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:35:11,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:35:11,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:35:11,740 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:35:11,740 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 19:35:11,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:35:11 BoogieIcfgContainer [2020-09-24 19:35:11,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:35:11,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:35:11,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:35:11,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:35:11,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:35:10" (1/3) ... [2020-09-24 19:35:11,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b7659f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:35:11, skipping insertion in model container [2020-09-24 19:35:11,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:11" (2/3) ... [2020-09-24 19:35:11,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b7659f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:35:11, skipping insertion in model container [2020-09-24 19:35:11,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:35:11" (3/3) ... [2020-09-24 19:35:11,775 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-09-24 19:35:11,788 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:35:11,799 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:35:11,824 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:35:11,864 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:35:11,864 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:35:11,865 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:35:11,865 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:35:11,865 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:35:11,865 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:35:11,865 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:35:11,866 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:35:11,903 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-09-24 19:35:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 19:35:11,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:11,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:11,920 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:11,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:11,929 INFO L82 PathProgramCache]: Analyzing trace with hash 789700725, now seen corresponding path program 1 times [2020-09-24 19:35:11,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:11,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348794923] [2020-09-24 19:35:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:12,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:12,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:12,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:12,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:12,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-09-24 19:35:12,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:12,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:35:12,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:12,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:35:12,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:12,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:12,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:12,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:35:12,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:12,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:35:12,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:12,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:12,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348794923] [2020-09-24 19:35:12,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:35:12,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 19:35:12,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91121211] [2020-09-24 19:35:12,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 19:35:12,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:12,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 19:35:12,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 19:35:12,342 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-09-24 19:35:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:12,368 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-09-24 19:35:12,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 19:35:12,369 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-09-24 19:35:12,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:12,380 INFO L225 Difference]: With dead ends: 44 [2020-09-24 19:35:12,380 INFO L226 Difference]: Without dead ends: 24 [2020-09-24 19:35:12,385 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 [2020-09-24 19:35:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-24 19:35:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-24 19:35:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-24 19:35:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-24 19:35:12,428 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2020-09-24 19:35:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:12,429 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-24 19:35:12,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 19:35:12,429 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-24 19:35:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 19:35:12,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:12,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:12,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:35:12,431 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:12,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:12,432 INFO L82 PathProgramCache]: Analyzing trace with hash 774924389, now seen corresponding path program 1 times [2020-09-24 19:35:12,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:12,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198723644] [2020-09-24 19:35:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:12,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:12,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:12,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:12,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:12,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-09-24 19:35:12,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:12,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:35:12,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:35:12,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 19:35:12,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 19:35:12,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:12,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:12,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:12,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:35:12,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:12,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:35:12,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:12,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:12,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:12,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:12,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:12,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198723644] [2020-09-24 19:35:12,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:35:12,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 19:35:12,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883591584] [2020-09-24 19:35:12,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:35:12,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:12,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:35:12,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:35:12,737 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-09-24 19:35:12,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:12,897 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-09-24 19:35:12,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:35:12,898 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-09-24 19:35:12,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:12,901 INFO L225 Difference]: With dead ends: 43 [2020-09-24 19:35:12,901 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 19:35:12,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:35:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 19:35:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2020-09-24 19:35:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-24 19:35:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-24 19:35:12,911 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 16 [2020-09-24 19:35:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:12,912 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-24 19:35:12,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:35:12,912 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-24 19:35:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 19:35:12,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:12,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:12,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:35:12,914 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:12,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:12,914 INFO L82 PathProgramCache]: Analyzing trace with hash 775379929, now seen corresponding path program 1 times [2020-09-24 19:35:12,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:12,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480776805] [2020-09-24 19:35:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:12,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:13,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:13,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:13,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:13,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 19:35:13,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:35:13,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-09-24 19:35:13,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:13,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:35:13,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 19:35:13,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 19:35:13,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 19:35:13,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:13,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:13,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:13,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:35:13,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:13,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:35:13,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:13,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:13,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:13,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:13,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:13,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480776805] [2020-09-24 19:35:13,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:35:13,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 19:35:13,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116760997] [2020-09-24 19:35:13,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 19:35:13,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:13,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 19:35:13,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:35:13,412 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 3 states. [2020-09-24 19:35:13,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:13,462 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-09-24 19:35:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 19:35:13,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-24 19:35:13,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:13,464 INFO L225 Difference]: With dead ends: 44 [2020-09-24 19:35:13,464 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 19:35:13,465 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 [2020-09-24 19:35:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 19:35:13,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-09-24 19:35:13,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-24 19:35:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-09-24 19:35:13,471 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-09-24 19:35:13,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:13,472 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-09-24 19:35:13,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 19:35:13,472 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-09-24 19:35:13,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 19:35:13,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:13,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:13,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:35:13,474 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:13,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:13,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1973531292, now seen corresponding path program 1 times [2020-09-24 19:35:13,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:13,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225860066] [2020-09-24 19:35:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:13,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:13,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:13,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:13,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 19:35:13,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:13,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-09-24 19:35:13,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:13,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:35:13,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 19:35:13,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 19:35:13,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:13,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:13,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:13,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:13,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:35:13,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:13,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:35:13,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:13,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:13,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225860066] [2020-09-24 19:35:13,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:13,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 19:35:13,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300645219] [2020-09-24 19:35:13,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:35:13,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:13,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:35:13,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:35:13,725 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 6 states. [2020-09-24 19:35:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:13,836 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-09-24 19:35:13,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 19:35:13,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-09-24 19:35:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:13,838 INFO L225 Difference]: With dead ends: 46 [2020-09-24 19:35:13,838 INFO L226 Difference]: Without dead ends: 41 [2020-09-24 19:35:13,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:35:13,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-24 19:35:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-09-24 19:35:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 19:35:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-09-24 19:35:13,846 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2020-09-24 19:35:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:13,847 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-09-24 19:35:13,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:35:13,847 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-09-24 19:35:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 19:35:13,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:13,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:13,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:35:13,849 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:13,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:13,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1981883390, now seen corresponding path program 1 times [2020-09-24 19:35:13,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:13,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712162518] [2020-09-24 19:35:13,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:13,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:14,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:14,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:14,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 19:35:14,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:14,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-09-24 19:35:14,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:14,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 19:35:14,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:35:14,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 19:35:14,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:14,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:14,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:14,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:14,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:35:14,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:14,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:35:14,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:14,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:14,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:14,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:14,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:14,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712162518] [2020-09-24 19:35:14,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:14,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 19:35:14,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523093529] [2020-09-24 19:35:14,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 19:35:14,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:14,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 19:35:14,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-24 19:35:14,856 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 14 states. [2020-09-24 19:35:15,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:15,245 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-09-24 19:35:15,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 19:35:15,246 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-09-24 19:35:15,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:15,247 INFO L225 Difference]: With dead ends: 56 [2020-09-24 19:35:15,247 INFO L226 Difference]: Without dead ends: 51 [2020-09-24 19:35:15,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-09-24 19:35:15,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-24 19:35:15,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-09-24 19:35:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 19:35:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-24 19:35:15,256 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 29 [2020-09-24 19:35:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:15,257 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-24 19:35:15,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 19:35:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-24 19:35:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 19:35:15,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:15,258 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:15,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:35:15,259 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:15,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:15,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1157374763, now seen corresponding path program 2 times [2020-09-24 19:35:15,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:15,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853465102] [2020-09-24 19:35:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:15,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:15,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:15,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:15,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:15,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:15,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:16,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:16,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 19:35:16,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:35:16,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-09-24 19:35:16,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:16,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:35:16,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 19:35:16,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:35:16,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:16,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:16,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:16,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:16,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:35:16,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:16,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:35:16,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:16,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:16,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:16,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:16,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 19:35:16,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853465102] [2020-09-24 19:35:16,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:35:16,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:35:16,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605302526] [2020-09-24 19:35:16,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:35:16,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:16,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:35:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:35:16,142 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-09-24 19:35:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:16,204 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-09-24 19:35:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:35:16,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-09-24 19:35:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:16,206 INFO L225 Difference]: With dead ends: 66 [2020-09-24 19:35:16,206 INFO L226 Difference]: Without dead ends: 45 [2020-09-24 19:35:16,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:35:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-24 19:35:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-09-24 19:35:16,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-24 19:35:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-09-24 19:35:16,214 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2020-09-24 19:35:16,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:16,214 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-09-24 19:35:16,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:35:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-09-24 19:35:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 19:35:16,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:16,216 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:16,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:35:16,216 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:16,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:16,217 INFO L82 PathProgramCache]: Analyzing trace with hash -282773191, now seen corresponding path program 3 times [2020-09-24 19:35:16,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:16,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243271138] [2020-09-24 19:35:16,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:16,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:16,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:16,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:16,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:17,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:17,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 19:35:17,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:35:17,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 891 [2020-09-24 19:35:17,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:17,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:35:17,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 19:35:17,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 19:35:17,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:17,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:17,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:17,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:17,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:35:17,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:17,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 19:35:17,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:17,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:17,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:17,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:17,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 19:35:17,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243271138] [2020-09-24 19:35:17,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:35:17,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:35:17,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314685051] [2020-09-24 19:35:17,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:35:17,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:17,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:35:17,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:35:17,198 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 5 states. [2020-09-24 19:35:17,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:17,251 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-09-24 19:35:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:35:17,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-09-24 19:35:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:17,253 INFO L225 Difference]: With dead ends: 49 [2020-09-24 19:35:17,253 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 19:35:17,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:35:17,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 19:35:17,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-09-24 19:35:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-24 19:35:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-09-24 19:35:17,259 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-09-24 19:35:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:17,260 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-09-24 19:35:17,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:35:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-09-24 19:35:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 19:35:17,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:17,262 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:17,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:35:17,262 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:17,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1065873285, now seen corresponding path program 4 times [2020-09-24 19:35:17,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:17,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113079459] [2020-09-24 19:35:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:17,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:17,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:18,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:18,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-24 19:35:18,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:18,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:35:18,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:18,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 19:35:18,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:35:18,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 19:35:18,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:18,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:18,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:18,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:18,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:35:18,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:18,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 19:35:18,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:18,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:18,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:18,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:18,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 19:35:18,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113079459] [2020-09-24 19:35:18,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:18,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 19:35:18,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140062815] [2020-09-24 19:35:18,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 19:35:18,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:18,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 19:35:18,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:35:18,631 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 15 states. [2020-09-24 19:35:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:19,219 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-09-24 19:35:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 19:35:19,220 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-09-24 19:35:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:19,223 INFO L225 Difference]: With dead ends: 65 [2020-09-24 19:35:19,223 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 19:35:19,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2020-09-24 19:35:19,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 19:35:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 19:35:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 19:35:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 19:35:19,228 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2020-09-24 19:35:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:19,229 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 19:35:19,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 19:35:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 19:35:19,229 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 19:35:19,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 19:35:19,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 19:35:19,405 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 19:35:19,405 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 19:35:19,405 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 19:35:19,405 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 19:35:19,405 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 19:35:19,405 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 19:35:19,406 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-24 19:35:19,406 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-24 19:35:19,406 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-24 19:35:19,406 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-24 19:35:19,406 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-24 19:35:19,407 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 25) no Hoare annotation was computed. [2020-09-24 19:35:19,407 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-09-24 19:35:19,407 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-09-24 19:35:19,407 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-24 19:35:19,407 INFO L268 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-09-24 19:35:19,407 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-24 19:35:19,408 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 25) no Hoare annotation was computed. [2020-09-24 19:35:19,408 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 25) the Hoare annotation is: true [2020-09-24 19:35:19,408 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-24 19:35:19,408 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-24 19:35:19,408 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-24 19:35:19,408 INFO L268 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-09-24 19:35:19,409 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-24 19:35:19,409 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-24 19:35:19,409 INFO L268 CegarLoopResult]: For program point L18-3(lines 18 22) no Hoare annotation was computed. [2020-09-24 19:35:19,409 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-24 19:35:19,410 INFO L268 CegarLoopResult]: For program point L18-4(line 18) no Hoare annotation was computed. [2020-09-24 19:35:19,410 INFO L268 CegarLoopResult]: For program point L18-5(line 18) no Hoare annotation was computed. [2020-09-24 19:35:19,410 INFO L264 CegarLoopResult]: At program point L18-6(lines 18 22) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (let ((.cse2 (<= .cse0 main_~i~0)) (.cse3 (<= main_~i~0 .cse0))) (or (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 2 main_~k~0)))) (and .cse2 .cse3 (= main_~n~0 0)) (and .cse2 .cse3 (< main_~n~0 (+ main_~k~0 1)))))) [2020-09-24 19:35:19,413 INFO L264 CegarLoopResult]: At program point L18-7(lines 18 22) the Hoare annotation is: (let ((.cse3 (* 2 main_~n~0))) (let ((.cse0 (<= main_~i~0 .cse3)) (.cse1 (<= main_~k~0 main_~n~0)) (.cse2 (< main_~n~0 (+ main_~k~0 1)))) (or (and (<= 0 main_~n~0) (<= main_~n~0 0) .cse0 .cse1) (and (< 0 main_~k~0) .cse1 .cse2) (and (<= .cse3 main_~i~0) .cse0 .cse1 .cse2)))) [2020-09-24 19:35:19,413 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-24 19:35:19,413 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-24 19:35:19,413 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-24 19:35:19,413 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-24 19:35:19,413 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-24 19:35:19,414 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-24 19:35:19,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:35:19 BoogieIcfgContainer [2020-09-24 19:35:19,462 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:35:19,471 INFO L168 Benchmark]: Toolchain (without parser) took 8522.02 ms. Allocated memory was 136.8 MB in the beginning and 300.4 MB in the end (delta: 163.6 MB). Free memory was 100.2 MB in the beginning and 240.1 MB in the end (delta: -139.9 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-09-24 19:35:19,472 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 136.8 MB. Free memory was 118.3 MB in the beginning and 117.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-24 19:35:19,475 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.68 ms. Allocated memory is still 136.8 MB. Free memory was 99.4 MB in the beginning and 90.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-24 19:35:19,476 INFO L168 Benchmark]: Boogie Preprocessor took 120.45 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 90.1 MB in the beginning and 178.0 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-24 19:35:19,477 INFO L168 Benchmark]: RCFGBuilder took 359.82 ms. Allocated memory is still 199.8 MB. Free memory was 178.0 MB in the beginning and 164.0 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-09-24 19:35:19,478 INFO L168 Benchmark]: TraceAbstraction took 7704.24 ms. Allocated memory was 199.8 MB in the beginning and 300.4 MB in the end (delta: 100.7 MB). Free memory was 164.0 MB in the beginning and 240.1 MB in the end (delta: -76.1 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2020-09-24 19:35:19,486 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 136.8 MB. Free memory was 118.3 MB in the beginning and 117.9 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.68 ms. Allocated memory is still 136.8 MB. Free memory was 99.4 MB in the beginning and 90.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.45 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 90.1 MB in the beginning and 178.0 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 359.82 ms. Allocated memory is still 199.8 MB. Free memory was 178.0 MB in the beginning and 164.0 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7704.24 ms. Allocated memory was 199.8 MB in the beginning and 300.4 MB in the end (delta: 100.7 MB). Free memory was 164.0 MB in the beginning and 240.1 MB in the end (delta: -76.1 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((2 * n <= i + 1 && i + 1 <= 2 * n) && i + 1 <= 2 * k) || ((2 * n <= i && i <= 2 * n) && n == 0)) || ((2 * n <= i && i <= 2 * n) && n < k + 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.3s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 167 SDtfs, 118 SDslu, 452 SDs, 0 SdLazy, 456 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=5, 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, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 23 NumberOfFragments, 105 HoareAnnotationTreeSize, 15 FomulaSimplifications, 81 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 28 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 222 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 214 ConstructedInterpolants, 0 QuantifiedInterpolants, 36066 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 52/88 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...