/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 NUM_FUNCTIONS --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/sum01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:19:05,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:19:05,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:19:05,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:19:05,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:19:05,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:19:05,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:19:05,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:19:05,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:19:05,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:19:05,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:19:05,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:19:05,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:19:05,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:19:05,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:19:05,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:19:05,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:19:05,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:19:05,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:19:05,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:19:05,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:19:05,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:19:05,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:19:05,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:19:05,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:19:05,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:19:05,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:19:05,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:19:05,259 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 [2020-07-20 14:19:05,274 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:19:05,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:19:05,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:19:05,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:19:05,276 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:19:05,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:19:05,276 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:19:05,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:19:05,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:19:05,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:19:05,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:19:05,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:19:05,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:19:05,278 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:19:05,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:19:05,278 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:19:05,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:19:05,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:19:05,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:19:05,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:19:05,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:19:05,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:19:05,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:19:05,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:19:05,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:19:05,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:19:05,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:05,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:19:05,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:19:05,281 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 -> NUM_FUNCTIONS 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 [2020-07-20 14:19:05,582 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:19:05,596 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:19:05,600 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:19:05,601 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:19:05,601 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:19:05,602 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-2.i [2020-07-20 14:19:05,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b147eb467/e760652061334a72b9a9ed983ea8e227/FLAG5f1f9f817 [2020-07-20 14:19:06,165 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:19:06,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i [2020-07-20 14:19:06,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b147eb467/e760652061334a72b9a9ed983ea8e227/FLAG5f1f9f817 [2020-07-20 14:19:06,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b147eb467/e760652061334a72b9a9ed983ea8e227 [2020-07-20 14:19:06,590 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:19:06,594 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:19:06,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:19:06,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:19:06,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:19:06,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:19:06" (1/1) ... [2020-07-20 14:19:06,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75fe535d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:06, skipping insertion in model container [2020-07-20 14:19:06,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:19:06" (1/1) ... [2020-07-20 14:19:06,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:19:06,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:19:06,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:19:06,817 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:19:06,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:19:06,847 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:19:06,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:06 WrapperNode [2020-07-20 14:19:06,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:19:06,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:19:06,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:19:06,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:19:06,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:06" (1/1) ... [2020-07-20 14:19:06,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:06" (1/1) ... [2020-07-20 14:19:06,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:06" (1/1) ... [2020-07-20 14:19:06,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:06" (1/1) ... [2020-07-20 14:19:06,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:06" (1/1) ... [2020-07-20 14:19:06,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:06" (1/1) ... [2020-07-20 14:19:06,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:06" (1/1) ... [2020-07-20 14:19:06,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:19:06,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:19:06,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:19:06,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:19:06,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:06" (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 [2020-07-20 14:19:07,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:19:07,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:19:07,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:19:07,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:19:07,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:19:07,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:19:07,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:19:07,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:19:07,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:19:07,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:19:07,248 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:19:07,249 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:19:07,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:19:07 BoogieIcfgContainer [2020-07-20 14:19:07,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:19:07,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:19:07,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:19:07,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:19:07,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:19:06" (1/3) ... [2020-07-20 14:19:07,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4533f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:19:07, skipping insertion in model container [2020-07-20 14:19:07,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:06" (2/3) ... [2020-07-20 14:19:07,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4533f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:19:07, skipping insertion in model container [2020-07-20 14:19:07,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:19:07" (3/3) ... [2020-07-20 14:19:07,265 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-2.i [2020-07-20 14:19:07,279 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:19:07,289 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:19:07,323 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:19:07,376 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:19:07,376 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:19:07,377 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:19:07,377 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:19:07,377 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:19:07,377 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:19:07,378 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:19:07,378 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:19:07,413 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 14:19:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 14:19:07,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:07,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:07,422 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:07,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:07,431 INFO L82 PathProgramCache]: Analyzing trace with hash 579653156, now seen corresponding path program 1 times [2020-07-20 14:19:07,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:07,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080442173] [2020-07-20 14:19:07,448 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 [2020-07-20 14:19:07,514 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:19:07,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:19:07,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 14:19:07,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:19:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:07,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:19:07,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080442173] [2020-07-20 14:19:07,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:19:07,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 14:19:07,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302490342] [2020-07-20 14:19:07,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 14:19:07,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:07,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 14:19:07,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:19:07,569 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-07-20 14:19:07,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:19:07,594 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-07-20 14:19:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 14:19:07,596 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-20 14:19:07,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:19:07,605 INFO L225 Difference]: With dead ends: 30 [2020-07-20 14:19:07,605 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 14:19:07,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:19:07,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 14:19:07,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 14:19:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 14:19:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 14:19:07,653 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-20 14:19:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:19:07,655 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 14:19:07,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 14:19:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 14:19:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 14:19:07,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:07,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:07,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:07,874 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:07,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:07,875 INFO L82 PathProgramCache]: Analyzing trace with hash 574112030, now seen corresponding path program 1 times [2020-07-20 14:19:07,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:07,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578529184] [2020-07-20 14:19:07,876 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 [2020-07-20 14:19:07,915 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:19:07,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:19:07,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:19:07,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:19:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:07,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:19:07,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578529184] [2020-07-20 14:19:07,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:19:07,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:19:07,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692248093] [2020-07-20 14:19:07,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:19:07,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:07,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:19:07,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:19:07,969 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-07-20 14:19:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:19:08,018 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-20 14:19:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 14:19:08,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-20 14:19:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:19:08,020 INFO L225 Difference]: With dead ends: 19 [2020-07-20 14:19:08,020 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 14:19:08,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:19:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 14:19:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 14:19:08,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 14:19:08,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-20 14:19:08,026 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-07-20 14:19:08,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:19:08,027 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-20 14:19:08,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:19:08,027 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-20 14:19:08,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 14:19:08,028 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:08,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:08,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:08,229 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:08,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1164206820, now seen corresponding path program 1 times [2020-07-20 14:19:08,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:08,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280174866] [2020-07-20 14:19:08,233 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 [2020-07-20 14:19:08,263 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:19:08,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:19:08,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 14:19:08,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:19:08,376 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:19:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:08,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:19:08,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:19:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:08,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280174866] [2020-07-20 14:19:08,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:19:08,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 14:19:08,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475568928] [2020-07-20 14:19:08,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 14:19:08,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:08,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 14:19:08,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-07-20 14:19:08,650 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2020-07-20 14:19:08,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:19:08,926 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-07-20 14:19:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 14:19:08,928 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2020-07-20 14:19:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:19:08,929 INFO L225 Difference]: With dead ends: 24 [2020-07-20 14:19:08,929 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 14:19:08,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 14:19:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 14:19:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 14:19:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 14:19:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-20 14:19:08,936 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 13 [2020-07-20 14:19:08,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:19:08,937 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-20 14:19:08,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 14:19:08,937 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-20 14:19:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 14:19:08,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:08,938 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:09,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:09,152 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:09,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:09,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2033115496, now seen corresponding path program 2 times [2020-07-20 14:19:09,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:09,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949435225] [2020-07-20 14:19:09,154 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 [2020-07-20 14:19:09,195 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:19:09,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:19:09,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 14:19:09,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:19:09,325 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:19:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:09,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:19:09,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:19:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:09,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949435225] [2020-07-20 14:19:09,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:19:09,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-20 14:19:09,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268794497] [2020-07-20 14:19:09,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 14:19:09,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:09,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 14:19:09,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-07-20 14:19:09,800 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 22 states. [2020-07-20 14:19:10,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:19:10,505 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-07-20 14:19:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 14:19:10,506 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 17 [2020-07-20 14:19:10,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:19:10,506 INFO L225 Difference]: With dead ends: 21 [2020-07-20 14:19:10,507 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 14:19:10,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2020-07-20 14:19:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 14:19:10,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 14:19:10,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 14:19:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 14:19:10,511 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-07-20 14:19:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:19:10,511 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 14:19:10,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 14:19:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 14:19:10,512 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 14:19:10,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:10,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 14:19:10,909 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 14:19:10,910 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:19:10,910 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:19:10,910 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 14:19:10,910 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 14:19:10,910 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 14:19:10,910 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-20 14:19:10,911 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-20 14:19:10,911 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-20 14:19:10,911 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 18) no Hoare annotation was computed. [2020-07-20 14:19:10,911 INFO L268 CegarLoopResult]: For program point L14-2(lines 14 16) no Hoare annotation was computed. [2020-07-20 14:19:10,911 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 16) the Hoare annotation is: (or (and (= 1 main_~i~0) (= 0 main_~sn~0)) (and (or (<= main_~i~0 main_~n~0) (= (* main_~n~0 2) main_~sn~0)) (< main_~i~0 (+ (div (+ main_~sn~0 2) 2) 1)) (< (div (+ main_~sn~0 5) 2) (+ main_~i~0 2)))) [2020-07-20 14:19:10,911 INFO L264 CegarLoopResult]: At program point L14-4(lines 14 16) the Hoare annotation is: (or (= (* main_~n~0 2) main_~sn~0) (= 0 main_~sn~0)) [2020-07-20 14:19:10,912 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2020-07-20 14:19:10,912 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2020-07-20 14:19:10,912 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-07-20 14:19:10,912 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-07-20 14:19:10,912 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-07-20 14:19:10,912 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2020-07-20 14:19:10,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:19:10 BoogieIcfgContainer [2020-07-20 14:19:10,931 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:19:10,934 INFO L168 Benchmark]: Toolchain (without parser) took 4341.55 ms. Allocated memory was 142.6 MB in the beginning and 252.2 MB in the end (delta: 109.6 MB). Free memory was 100.6 MB in the beginning and 184.5 MB in the end (delta: -83.9 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:10,935 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 142.6 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 14:19:10,936 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.93 ms. Allocated memory is still 142.6 MB. Free memory was 100.2 MB in the beginning and 90.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:10,937 INFO L168 Benchmark]: Boogie Preprocessor took 117.02 ms. Allocated memory was 142.6 MB in the beginning and 199.8 MB in the end (delta: 57.1 MB). Free memory was 90.4 MB in the beginning and 178.7 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:10,938 INFO L168 Benchmark]: RCFGBuilder took 287.30 ms. Allocated memory is still 199.8 MB. Free memory was 178.7 MB in the beginning and 166.2 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:10,939 INFO L168 Benchmark]: TraceAbstraction took 3675.95 ms. Allocated memory was 199.8 MB in the beginning and 252.2 MB in the end (delta: 52.4 MB). Free memory was 165.5 MB in the beginning and 184.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:10,944 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 142.6 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.93 ms. Allocated memory is still 142.6 MB. Free memory was 100.2 MB in the beginning and 90.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.02 ms. Allocated memory was 142.6 MB in the beginning and 199.8 MB in the end (delta: 57.1 MB). Free memory was 90.4 MB in the beginning and 178.7 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 287.30 ms. Allocated memory is still 199.8 MB. Free memory was 178.7 MB in the beginning and 166.2 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3675.95 ms. Allocated memory was 199.8 MB in the beginning and 252.2 MB in the end (delta: 52.4 MB). Free memory was 165.5 MB in the beginning and 184.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (1 == i && 0 == sn) || (((i <= n || n * 2 == sn) && i < (sn + 2) / 2 + 1) && (sn + 5) / 2 < i + 2) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 47 SDtfs, 20 SDslu, 155 SDs, 0 SdLazy, 183 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 21 NumberOfFragments, 50 HoareAnnotationTreeSize, 12 FomulaSimplifications, 40 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 133 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 52 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 6728 SizeOfPredicates, 10 NumberOfNonLiveVariables, 136 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 0/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...