/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:42:41,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:42:41,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:42:41,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:42:41,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:42:41,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:42:41,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:42:41,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:42:41,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:42:41,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:42:41,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:42:41,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:42:41,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:42:41,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:42:41,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:42:41,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:42:41,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:42:41,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:42:41,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:42:41,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:42:41,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:42:41,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:42:41,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:42:41,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:42:41,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 01:42:41,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 01:42:41,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 01:42:41,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 01:42:41,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 01:42:41,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 01:42:41,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 01:42:41,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 01:42:41,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 01:42:41,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 01:42:41,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 01:42:41,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 01:42:41,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 01:42:41,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 01:42:41,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:42:41,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:42:41,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:42:41,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 01:42:41,441 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:42:41,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:42:41,443 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:42:41,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:42:41,444 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:42:41,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:42:41,444 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:42:41,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:42:41,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:42:41,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:42:41,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:42:41,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:42:41,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:42:41,446 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:42:41,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:42:41,446 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:42:41,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:42:41,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:42:41,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:42:41,447 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:42:41,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:42:41,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:42:41,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:42:41,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:42:41,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:42:41,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:42:41,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:41,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:42:41,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:42:41,449 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:42:41,775 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:42:41,803 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:42:41,807 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:42:41,812 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:42:41,813 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:42:41,816 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-07-21 01:42:41,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d828053c/aec447bd29c44d4896aa7c153367fdbf/FLAG7f689bfa3 [2020-07-21 01:42:42,518 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:42:42,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2020-07-21 01:42:42,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d828053c/aec447bd29c44d4896aa7c153367fdbf/FLAG7f689bfa3 [2020-07-21 01:42:42,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d828053c/aec447bd29c44d4896aa7c153367fdbf [2020-07-21 01:42:42,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:42:42,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:42:42,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:42:42,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:42:42,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:42:42,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:42" (1/1) ... [2020-07-21 01:42:42,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35edd3b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:42, skipping insertion in model container [2020-07-21 01:42:42,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:42" (1/1) ... [2020-07-21 01:42:42,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:42:42,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:42:43,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:42:43,182 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:42:43,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:42:43,218 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:42:43,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:43 WrapperNode [2020-07-21 01:42:43,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:42:43,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:42:43,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:42:43,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:42:43,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:43" (1/1) ... [2020-07-21 01:42:43,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:43" (1/1) ... [2020-07-21 01:42:43,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:43" (1/1) ... [2020-07-21 01:42:43,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:43" (1/1) ... [2020-07-21 01:42:43,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:43" (1/1) ... [2020-07-21 01:42:43,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:43" (1/1) ... [2020-07-21 01:42:43,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:43" (1/1) ... [2020-07-21 01:42:43,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:42:43,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:42:43,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:42:43,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:42:43,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 01:42:43,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:42:43,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:42:43,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:42:43,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:42:43,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:42:43,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:42:43,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 01:42:43,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:42:43,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:42:43,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:42:43,654 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:42:43,655 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:42:43,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:43 BoogieIcfgContainer [2020-07-21 01:42:43,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:42:43,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:42:43,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:42:43,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:42:43,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:42:42" (1/3) ... [2020-07-21 01:42:43,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a36f3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:43, skipping insertion in model container [2020-07-21 01:42:43,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:43" (2/3) ... [2020-07-21 01:42:43,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a36f3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:43, skipping insertion in model container [2020-07-21 01:42:43,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:43" (3/3) ... [2020-07-21 01:42:43,670 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-07-21 01:42:43,683 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:42:43,690 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:42:43,703 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:42:43,727 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:42:43,728 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:42:43,728 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:42:43,728 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:42:43,728 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:42:43,729 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:42:43,729 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:42:43,729 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:42:43,750 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 01:42:43,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:42:43,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:43,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:43,758 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:43,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:43,764 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-07-21 01:42:43,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:43,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826706595] [2020-07-21 01:42:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:43,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:42:43,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:43,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:42:43,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:43,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:42:43,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826706595] [2020-07-21 01:42:43,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:42:43,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:42:43,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788173713] [2020-07-21 01:42:43,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:42:43,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:43,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:42:43,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:42:43,916 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-07-21 01:42:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:43,944 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-07-21 01:42:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:42:43,945 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 01:42:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:43,954 INFO L225 Difference]: With dead ends: 30 [2020-07-21 01:42:43,954 INFO L226 Difference]: Without dead ends: 13 [2020-07-21 01:42:43,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:42:43,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-21 01:42:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-21 01:42:43,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-21 01:42:43,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-07-21 01:42:43,999 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-07-21 01:42:44,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:44,000 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-07-21 01:42:44,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:42:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-07-21 01:42:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:42:44,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:44,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:44,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:44,212 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:44,213 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-07-21 01:42:44,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:44,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487001888] [2020-07-21 01:42:44,214 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:44,257 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:42:44,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:44,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:42:44,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:44,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:42:44,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487001888] [2020-07-21 01:42:44,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:42:44,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:42:44,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438672359] [2020-07-21 01:42:44,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:42:44,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:42:44,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:42:44,384 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-07-21 01:42:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:44,449 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-07-21 01:42:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:42:44,450 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 01:42:44,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:44,451 INFO L225 Difference]: With dead ends: 21 [2020-07-21 01:42:44,452 INFO L226 Difference]: Without dead ends: 16 [2020-07-21 01:42:44,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:42:44,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-21 01:42:44,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-21 01:42:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-21 01:42:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-07-21 01:42:44,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-07-21 01:42:44,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:44,460 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-07-21 01:42:44,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:42:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-21 01:42:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:42:44,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:44,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:44,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:44,676 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:44,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:44,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-07-21 01:42:44,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:44,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91319463] [2020-07-21 01:42:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:44,715 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:42:44,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:44,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 01:42:44,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:44,868 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:42:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:44,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:44,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:42:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:45,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91319463] [2020-07-21 01:42:45,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:45,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 01:42:45,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40388561] [2020-07-21 01:42:45,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 01:42:45,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:45,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 01:42:45,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:42:45,165 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 14 states. [2020-07-21 01:42:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:45,484 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-21 01:42:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 01:42:45,485 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2020-07-21 01:42:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:45,486 INFO L225 Difference]: With dead ends: 36 [2020-07-21 01:42:45,486 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 01:42:45,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-07-21 01:42:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 01:42:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-07-21 01:42:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 01:42:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-21 01:42:45,494 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2020-07-21 01:42:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:45,495 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-21 01:42:45,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 01:42:45,495 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-21 01:42:45,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:42:45,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:45,496 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:45,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:45,711 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:45,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:45,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 1 times [2020-07-21 01:42:45,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:45,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679965614] [2020-07-21 01:42:45,713 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:45,739 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:42:45,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:45,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:42:45,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:45,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:45,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679965614] [2020-07-21 01:42:45,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:45,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 01:42:45,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596200480] [2020-07-21 01:42:45,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:42:45,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:45,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:42:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:42:45,844 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-07-21 01:42:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:45,942 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-07-21 01:42:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:42:45,944 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-21 01:42:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:45,947 INFO L225 Difference]: With dead ends: 42 [2020-07-21 01:42:45,948 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 01:42:45,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:42:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 01:42:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-07-21 01:42:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 01:42:45,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-21 01:42:45,976 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2020-07-21 01:42:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:45,976 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-21 01:42:45,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:42:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-21 01:42:45,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:42:45,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:45,978 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:46,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:46,195 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:46,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:46,195 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 2 times [2020-07-21 01:42:46,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:46,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482857941] [2020-07-21 01:42:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:46,223 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:42:46,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:46,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 01:42:46,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:46,357 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:42:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:46,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:46,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:42:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:46,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482857941] [2020-07-21 01:42:46,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:46,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-21 01:42:46,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40263144] [2020-07-21 01:42:46,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 01:42:46,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:46,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 01:42:46,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-07-21 01:42:46,785 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 22 states. [2020-07-21 01:42:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:47,770 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-07-21 01:42:47,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 01:42:47,771 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 19 [2020-07-21 01:42:47,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:47,772 INFO L225 Difference]: With dead ends: 41 [2020-07-21 01:42:47,772 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 01:42:47,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 01:42:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 01:42:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-21 01:42:47,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 01:42:47,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-07-21 01:42:47,782 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2020-07-21 01:42:47,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:47,782 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-07-21 01:42:47,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 01:42:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-07-21 01:42:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 01:42:47,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:47,784 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:47,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:47,998 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:47,999 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 2 times [2020-07-21 01:42:48,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:48,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667570474] [2020-07-21 01:42:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:48,035 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:42:48,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:48,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:42:48,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:48,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:48,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667570474] [2020-07-21 01:42:48,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:48,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-21 01:42:48,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513621507] [2020-07-21 01:42:48,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 01:42:48,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:48,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 01:42:48,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:42:48,200 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2020-07-21 01:42:48,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:48,279 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-07-21 01:42:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 01:42:48,279 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-07-21 01:42:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:48,280 INFO L225 Difference]: With dead ends: 51 [2020-07-21 01:42:48,281 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 01:42:48,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:42:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 01:42:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-07-21 01:42:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 01:42:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-07-21 01:42:48,290 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 31 [2020-07-21 01:42:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:48,290 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-07-21 01:42:48,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 01:42:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-07-21 01:42:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 01:42:48,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:48,292 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:48,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:48,507 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:48,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 3 times [2020-07-21 01:42:48,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:48,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837115400] [2020-07-21 01:42:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:48,549 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:42:48,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:42:48,550 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:42:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:42:48,564 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:42:48,587 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:42:48,588 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:42:48,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:48,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:42:48 BoogieIcfgContainer [2020-07-21 01:42:48,839 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:42:48,842 INFO L168 Benchmark]: Toolchain (without parser) took 5969.51 ms. Allocated memory was 137.4 MB in the beginning and 249.0 MB in the end (delta: 111.7 MB). Free memory was 101.1 MB in the beginning and 97.3 MB in the end (delta: 3.8 MB). Peak memory consumption was 115.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:48,843 INFO L168 Benchmark]: CDTParser took 0.85 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 118.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 01:42:48,845 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.29 ms. Allocated memory is still 137.4 MB. Free memory was 100.7 MB in the beginning and 91.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:48,848 INFO L168 Benchmark]: Boogie Preprocessor took 130.87 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.3 MB in the beginning and 182.0 MB in the end (delta: -90.7 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:48,854 INFO L168 Benchmark]: RCFGBuilder took 309.29 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 168.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:48,855 INFO L168 Benchmark]: TraceAbstraction took 5177.33 ms. Allocated memory was 201.9 MB in the beginning and 249.0 MB in the end (delta: 47.2 MB). Free memory was 168.7 MB in the beginning and 97.3 MB in the end (delta: 71.4 MB). Peak memory consumption was 118.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:48,864 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 118.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 344.29 ms. Allocated memory is still 137.4 MB. Free memory was 100.7 MB in the beginning and 91.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.87 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.3 MB in the beginning and 182.0 MB in the end (delta: -90.7 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 309.29 ms. Allocated memory is still 201.9 MB. Free memory was 181.0 MB in the beginning and 168.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5177.33 ms. Allocated memory was 201.9 MB in the beginning and 249.0 MB in the end (delta: 47.2 MB). Free memory was 168.7 MB in the beginning and 97.3 MB in the end (delta: 71.4 MB). Peak memory consumption was 118.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=10, n=0] [L13] COND TRUE i<=n VAL [i=1, n=0, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=1, n=10, n=2] [L13] i++ VAL [i=2, n=10, n=2] [L13] COND TRUE i<=n VAL [i=2, n=10, n=2] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=2, n=10, n=4] [L13] i++ VAL [i=3, n=10, n=4] [L13] COND TRUE i<=n VAL [i=3, n=10, n=4] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=3, n=10, n=6] [L13] i++ VAL [i=4, n=6, n=10] [L13] COND TRUE i<=n VAL [i=4, n=10, n=6] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=4, n=8, n=10] [L13] i++ VAL [i=5, n=8, n=10] [L13] COND TRUE i<=n VAL [i=5, n=10, n=8] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=5, n=10, n=10] [L13] i++ VAL [i=6, n=10, n=10] [L13] COND TRUE i<=n VAL [i=6, n=10, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=6, n=10, n=12] [L13] i++ VAL [i=7, n=10, n=12] [L13] COND TRUE i<=n VAL [i=7, n=12, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=7, n=10, n=14] [L13] i++ VAL [i=8, n=14, n=10] [L13] COND TRUE i<=n VAL [i=8, n=14, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=8, n=10, n=16] [L13] i++ VAL [i=9, n=10, n=16] [L13] COND TRUE i<=n VAL [i=9, n=10, n=16] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=9, n=18, n=10] [L13] i++ VAL [i=10, n=10, n=18] [L13] COND TRUE i<=n VAL [i=10, n=10, n=18] [L14] COND FALSE !(i<10) VAL [i=10, n=18, n=10] [L13] i++ VAL [i=11, n=10, n=18] [L13] COND FALSE !(i<=n) VAL [i=11, n=18, n=10] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.0s, OverallIterations: 7, TraceHistogramMax: 10, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 59 SDslu, 221 SDs, 0 SdLazy, 334 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 197 GetRequests, 119 SyntacticMatches, 9 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=6, 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, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 142 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 174 ConstructedInterpolants, 0 QuantifiedInterpolants, 13236 SizeOfPredicates, 12 NumberOfNonLiveVariables, 216 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 36/190 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 incorrect! Received shutdown request...