/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/loop-acceleration/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:13:06,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:13:06,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:13:06,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:13:06,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:13:06,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:13:06,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:13:06,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:13:06,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:13:06,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:13:06,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:13:06,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:13:06,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:13:06,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:13:06,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:13:06,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:13:06,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:13:06,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:13:06,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:13:06,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:13:06,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:13:06,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:13:06,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:13:06,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:13:06,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:13:06,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:13:06,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:13:06,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:13:06,492 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 23:13:06,512 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:13:06,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:13:06,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:13:06,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:13:06,517 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:13:06,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:13:06,518 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:13:06,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:13:06,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:13:06,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:13:06,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:13:06,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:13:06,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:13:06,520 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:13:06,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:13:06,520 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:13:06,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:13:06,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:13:06,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:13:06,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:13:06,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:13:06,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:13:06,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:13:06,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:13:06,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:13:06,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:13:06,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:06,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:13:06,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:13:06,523 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 23:13:06,925 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:13:06,951 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:13:06,958 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:13:06,962 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:13:06,963 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:13:06,966 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-07-21 23:13:07,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c41737c5/bd505d320eff4ca4a6b73d5e2f28fe17/FLAGbc94b2cf7 [2020-07-21 23:13:07,942 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:13:07,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-07-21 23:13:07,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c41737c5/bd505d320eff4ca4a6b73d5e2f28fe17/FLAGbc94b2cf7 [2020-07-21 23:13:07,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c41737c5/bd505d320eff4ca4a6b73d5e2f28fe17 [2020-07-21 23:13:08,011 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:13:08,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:13:08,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:13:08,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:13:08,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:13:08,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:07" (1/1) ... [2020-07-21 23:13:08,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c7bccb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:08, skipping insertion in model container [2020-07-21 23:13:08,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:07" (1/1) ... [2020-07-21 23:13:08,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:13:08,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:13:08,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:13:08,355 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:13:08,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:13:08,397 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:13:08,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:08 WrapperNode [2020-07-21 23:13:08,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:13:08,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:13:08,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:13:08,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:13:08,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:08" (1/1) ... [2020-07-21 23:13:08,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:08" (1/1) ... [2020-07-21 23:13:08,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:08" (1/1) ... [2020-07-21 23:13:08,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:08" (1/1) ... [2020-07-21 23:13:08,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:08" (1/1) ... [2020-07-21 23:13:08,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:08" (1/1) ... [2020-07-21 23:13:08,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:08" (1/1) ... [2020-07-21 23:13:08,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:13:08,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:13:08,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:13:08,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:13:08,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:08" (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 23:13:08,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:13:08,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:13:08,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:13:08,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:13:08,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:13:08,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:13:08,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:13:08,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:13:08,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:13:08,917 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:13:08,919 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:13:08,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:08 BoogieIcfgContainer [2020-07-21 23:13:08,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:13:08,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:13:08,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:13:08,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:13:08,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:13:07" (1/3) ... [2020-07-21 23:13:08,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131a6f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:08, skipping insertion in model container [2020-07-21 23:13:08,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:08" (2/3) ... [2020-07-21 23:13:08,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131a6f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:08, skipping insertion in model container [2020-07-21 23:13:08,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:08" (3/3) ... [2020-07-21 23:13:08,937 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2020-07-21 23:13:08,952 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:13:08,962 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:13:08,985 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:13:09,025 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:13:09,026 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:13:09,026 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:13:09,026 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:13:09,026 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:13:09,026 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:13:09,026 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:13:09,027 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:13:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 23:13:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 23:13:09,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:13:09,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:13:09,071 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:13:09,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:13:09,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-07-21 23:13:09,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:13:09,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96593149] [2020-07-21 23:13:09,093 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 23:13:09,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:13:09,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:13:09,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:13:09,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:13:09,341 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 23:13:09,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:13:09,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96593149] [2020-07-21 23:13:09,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:13:09,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:13:09,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469801174] [2020-07-21 23:13:09,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:13:09,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:13:09,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:13:09,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:13:09,401 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-07-21 23:13:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:13:09,473 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 23:13:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:13:09,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 23:13:09,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:13:09,487 INFO L225 Difference]: With dead ends: 29 [2020-07-21 23:13:09,488 INFO L226 Difference]: Without dead ends: 12 [2020-07-21 23:13:09,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:13:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-21 23:13:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-21 23:13:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-21 23:13:09,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-21 23:13:09,559 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-21 23:13:09,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:13:09,560 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-21 23:13:09,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:13:09,560 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-21 23:13:09,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:13:09,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:13:09,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:13:09,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:09,778 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:13:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:13:09,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-07-21 23:13:09,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:13:09,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659668035] [2020-07-21 23:13:09,781 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 23:13:09,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:13:09,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:13:09,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:13:09,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:13:09,863 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 23:13:09,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:13:09,942 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 23:13:09,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659668035] [2020-07-21 23:13:09,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:13:09,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 23:13:09,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475912023] [2020-07-21 23:13:09,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 23:13:09,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:13:09,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 23:13:09,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:13:09,947 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-07-21 23:13:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:13:10,046 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-21 23:13:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 23:13:10,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-21 23:13:10,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:13:10,050 INFO L225 Difference]: With dead ends: 20 [2020-07-21 23:13:10,050 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 23:13:10,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:13:10,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 23:13:10,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 23:13:10,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 23:13:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-21 23:13:10,058 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-07-21 23:13:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:13:10,059 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-21 23:13:10,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 23:13:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-21 23:13:10,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 23:13:10,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:13:10,061 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:13:10,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:10,277 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:13:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:13:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times [2020-07-21 23:13:10,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:13:10,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351806848] [2020-07-21 23:13:10,280 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 23:13:10,319 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:13:10,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:13:10,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 23:13:10,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:13:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:13:10,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:13:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:13:10,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351806848] [2020-07-21 23:13:10,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:13:10,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 23:13:10,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56387831] [2020-07-21 23:13:10,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 23:13:10,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:13:10,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 23:13:10,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:13:10,619 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-21 23:13:10,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:13:10,742 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-07-21 23:13:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:13:10,742 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-21 23:13:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:13:10,743 INFO L225 Difference]: With dead ends: 22 [2020-07-21 23:13:10,743 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 23:13:10,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:13:10,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 23:13:10,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 23:13:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 23:13:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 23:13:10,754 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-21 23:13:10,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:13:10,754 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 23:13:10,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 23:13:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 23:13:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 23:13:10,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:13:10,755 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:13:10,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:10,957 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:13:10,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:13:10,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 3 times [2020-07-21 23:13:10,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:13:10,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107016459] [2020-07-21 23:13:10,959 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 23:13:11,014 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:13:11,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 23:13:11,015 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:13:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 23:13:11,034 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:13:11,077 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 23:13:11,078 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 23:13:11,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:11,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:13:11 BoogieIcfgContainer [2020-07-21 23:13:11,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:13:11,337 INFO L168 Benchmark]: Toolchain (without parser) took 3323.60 ms. Allocated memory was 137.4 MB in the beginning and 202.9 MB in the end (delta: 65.5 MB). Free memory was 100.2 MB in the beginning and 102.8 MB in the end (delta: -2.5 MB). Peak memory consumption was 63.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:13:11,339 INFO L168 Benchmark]: CDTParser took 0.75 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 23:13:11,341 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.41 ms. Allocated memory is still 137.4 MB. Free memory was 99.8 MB in the beginning and 90.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 23:13:11,342 INFO L168 Benchmark]: Boogie Preprocessor took 166.43 ms. Allocated memory was 137.4 MB in the beginning and 202.9 MB in the end (delta: 65.5 MB). Free memory was 90.5 MB in the beginning and 182.0 MB in the end (delta: -91.5 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:13:11,343 INFO L168 Benchmark]: RCFGBuilder took 355.94 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 170.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-07-21 23:13:11,344 INFO L168 Benchmark]: TraceAbstraction took 2410.48 ms. Allocated memory is still 202.9 MB. Free memory was 170.2 MB in the beginning and 102.8 MB in the end (delta: 67.4 MB). Peak memory consumption was 67.4 MB. Max. memory is 7.1 GB. [2020-07-21 23:13:11,349 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.75 ms. Allocated memory is still 137.4 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 378.41 ms. Allocated memory is still 137.4 MB. Free memory was 99.8 MB in the beginning and 90.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 166.43 ms. Allocated memory was 137.4 MB in the beginning and 202.9 MB in the end (delta: 65.5 MB). Free memory was 90.5 MB in the beginning and 182.0 MB in the end (delta: -91.5 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 355.94 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 170.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2410.48 ms. Allocated memory is still 202.9 MB. Free memory was 170.2 MB in the beginning and 102.8 MB in the end (delta: 67.4 MB). Peak memory consumption was 67.4 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: [L11] unsigned int x = 0; [L12] unsigned int y = 1; VAL [x=0, y=1] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=1, y=2] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=2, y=4] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=3, y=8] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=4, y=16] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=5, y=32] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=6, y=64] [L14] COND FALSE !(x < 6) VAL [x=6, y=64] [L19] CALL __VERIFIER_assert(x != 6) 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, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 0 SDslu, 94 SDs, 0 SdLazy, 57 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 51 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 1271 SizeOfPredicates, 3 NumberOfNonLiveVariables, 82 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/22 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...