/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:15:59,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:15:59,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:15:59,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:15:59,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:15:59,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:15:59,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:15:59,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:15:59,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:15:59,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:15:59,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:15:59,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:15:59,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:15:59,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:15:59,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:15:59,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:15:59,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:15:59,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:15:59,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:15:59,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:15:59,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:15:59,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:15:59,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:15:59,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:15:59,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:15:59,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:15:59,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:15:59,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:15:59,481 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 14:15:59,512 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:15:59,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:15:59,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:15:59,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:15:59,513 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:15:59,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:15:59,514 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:15:59,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:15:59,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:15:59,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:15:59,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:15:59,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:15:59,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:15:59,515 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:15:59,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:15:59,515 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:15:59,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:15:59,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:15:59,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:15:59,516 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:15:59,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:15:59,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:15:59,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:15:59,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:15:59,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:15:59,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:15:59,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:15:59,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:15:59,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:15:59,518 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 -> 2 [2020-07-21 14:15:59,775 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:15:59,792 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:15:59,795 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:15:59,796 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:15:59,799 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:15:59,799 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-07-21 14:15:59,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/137fd91af/90f4c4ccb20d47d8a8038f6a56236c79/FLAGfd3f0dc7b [2020-07-21 14:16:00,284 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:16:00,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-07-21 14:16:00,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/137fd91af/90f4c4ccb20d47d8a8038f6a56236c79/FLAGfd3f0dc7b [2020-07-21 14:16:00,673 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/137fd91af/90f4c4ccb20d47d8a8038f6a56236c79 [2020-07-21 14:16:00,681 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:16:00,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:16:00,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:16:00,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:16:00,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:16:00,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:16:00" (1/1) ... [2020-07-21 14:16:00,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f0d81fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:16:00, skipping insertion in model container [2020-07-21 14:16:00,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:16:00" (1/1) ... [2020-07-21 14:16:00,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:16:00,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:16:00,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:16:00,876 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:16:00,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:16:00,904 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:16:00,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:16:00 WrapperNode [2020-07-21 14:16:00,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:16:00,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:16:00,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:16:00,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:16:00,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:16:00" (1/1) ... [2020-07-21 14:16:00,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:16:00" (1/1) ... [2020-07-21 14:16:00,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:16:00" (1/1) ... [2020-07-21 14:16:00,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:16:00" (1/1) ... [2020-07-21 14:16:00,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:16:00" (1/1) ... [2020-07-21 14:16:00,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:16:00" (1/1) ... [2020-07-21 14:16:00,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:16:00" (1/1) ... [2020-07-21 14:16:01,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:16:01,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:16:01,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:16:01,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:16:01,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:16:00" (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 14:16:01,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:16:01,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:16:01,082 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:16:01,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:16:01,082 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:16:01,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:16:01,082 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:16:01,082 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:16:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:16:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:16:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:16:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:16:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:16:01,269 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:16:01,269 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 14:16:01,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:16:01 BoogieIcfgContainer [2020-07-21 14:16:01,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:16:01,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:16:01,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:16:01,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:16:01,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:16:00" (1/3) ... [2020-07-21 14:16:01,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6c5d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:16:01, skipping insertion in model container [2020-07-21 14:16:01,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:16:00" (2/3) ... [2020-07-21 14:16:01,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6c5d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:16:01, skipping insertion in model container [2020-07-21 14:16:01,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:16:01" (3/3) ... [2020-07-21 14:16:01,279 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-07-21 14:16:01,287 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:16:01,293 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:16:01,306 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:16:01,327 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:16:01,327 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:16:01,328 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:16:01,328 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:16:01,328 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:16:01,328 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:16:01,328 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:16:01,328 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:16:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 14:16:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 14:16:01,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:16:01,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:16:01,351 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:16:01,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:16:01,356 INFO L82 PathProgramCache]: Analyzing trace with hash 508025261, now seen corresponding path program 1 times [2020-07-21 14:16:01,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:16:01,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302391061] [2020-07-21 14:16:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:16:01,429 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:16:01,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:16:01,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:16:01,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:16:01,532 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:16:01,580 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 14:16:01,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:16:01,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302391061] [2020-07-21 14:16:01,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:16:01,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:16:01,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554357335] [2020-07-21 14:16:01,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:16:01,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:16:01,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:16:01,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:16:01,599 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-21 14:16:01,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:16:01,675 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-07-21 14:16:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:16:01,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 14:16:01,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:16:01,684 INFO L225 Difference]: With dead ends: 46 [2020-07-21 14:16:01,684 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 14:16:01,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:16:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 14:16:01,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-07-21 14:16:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 14:16:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-21 14:16:01,726 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2020-07-21 14:16:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:16:01,727 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-21 14:16:01,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:16:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-21 14:16:01,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 14:16:01,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:16:01,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:16:01,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:16:01,932 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:16:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:16:01,934 INFO L82 PathProgramCache]: Analyzing trace with hash -133512762, now seen corresponding path program 1 times [2020-07-21 14:16:01,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:16:01,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687221928] [2020-07-21 14:16:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:16:01,965 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:16:01,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:16:01,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:16:01,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:16:01,987 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:16:02,012 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 14:16:02,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:16:02,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:16:02,056 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 14:16:02,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687221928] [2020-07-21 14:16:02,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:16:02,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-21 14:16:02,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926363240] [2020-07-21 14:16:02,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 14:16:02,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:16:02,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 14:16:02,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:16:02,061 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2020-07-21 14:16:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:16:02,129 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-21 14:16:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:16:02,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-21 14:16:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:16:02,133 INFO L225 Difference]: With dead ends: 30 [2020-07-21 14:16:02,133 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 14:16:02,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:16:02,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 14:16:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2020-07-21 14:16:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 14:16:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 14:16:02,141 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-21 14:16:02,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:16:02,141 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 14:16:02,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 14:16:02,142 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 14:16:02,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 14:16:02,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:16:02,143 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:16:02,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:16:02,359 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:16:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:16:02,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1022031800, now seen corresponding path program 1 times [2020-07-21 14:16:02,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:16:02,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367448974] [2020-07-21 14:16:02,361 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:16:02,392 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:16:02,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:16:02,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:16:02,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:16:02,417 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:16:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:16:02,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:16:02,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367448974] [2020-07-21 14:16:02,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:16:02,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 14:16:02,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540118102] [2020-07-21 14:16:02,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 14:16:02,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:16:02,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 14:16:02,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:16:02,436 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-07-21 14:16:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:16:02,503 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-07-21 14:16:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 14:16:02,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 14:16:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:16:02,505 INFO L225 Difference]: With dead ends: 31 [2020-07-21 14:16:02,505 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 14:16:02,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:16:02,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 14:16:02,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-07-21 14:16:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 14:16:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-07-21 14:16:02,511 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-07-21 14:16:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:16:02,512 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-07-21 14:16:02,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 14:16:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-21 14:16:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 14:16:02,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:16:02,513 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:16:02,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:16:02,727 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:16:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:16:02,727 INFO L82 PathProgramCache]: Analyzing trace with hash 996292415, now seen corresponding path program 1 times [2020-07-21 14:16:02,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:16:02,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382586452] [2020-07-21 14:16:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 14:16:02,757 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:16:02,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:16:02,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:16:02,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:16:02,780 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:16:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:16:02,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:16:02,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382586452] [2020-07-21 14:16:02,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:16:02,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 14:16:02,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372954037] [2020-07-21 14:16:02,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 14:16:02,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:16:02,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 14:16:02,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:16:02,806 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-07-21 14:16:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:16:02,887 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-07-21 14:16:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 14:16:02,888 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-07-21 14:16:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:16:02,889 INFO L225 Difference]: With dead ends: 28 [2020-07-21 14:16:02,889 INFO L226 Difference]: Without dead ends: 19 [2020-07-21 14:16:02,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:16:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-21 14:16:02,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-21 14:16:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 14:16:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-21 14:16:02,894 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 18 [2020-07-21 14:16:02,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:16:02,894 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-21 14:16:02,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 14:16:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-21 14:16:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 14:16:02,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:16:02,896 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:16:03,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:16:03,108 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:16:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:16:03,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1254457853, now seen corresponding path program 1 times [2020-07-21 14:16:03,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:16:03,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211960857] [2020-07-21 14:16:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:16:03,132 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:16:03,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:16:03,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:16:03,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:16:03,168 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:16:03,170 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:16:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:16:03,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:16:03,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:16:03,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:16:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:16:03,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211960857] [2020-07-21 14:16:03,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:16:03,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 14:16:03,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57255897] [2020-07-21 14:16:03,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:16:03,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:16:03,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:16:03,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:16:03,244 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2020-07-21 14:16:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:16:03,306 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-21 14:16:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 14:16:03,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-21 14:16:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:16:03,307 INFO L225 Difference]: With dead ends: 19 [2020-07-21 14:16:03,307 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 14:16:03,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 14:16:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 14:16:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 14:16:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 14:16:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 14:16:03,311 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-07-21 14:16:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:16:03,313 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 14:16:03,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:16:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 14:16:03,313 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 14:16:03,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:16:03,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 14:16:03,773 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 14:16:03,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:16:03,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:16:03,773 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 14:16:03,774 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 14:16:03,774 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 14:16:03,774 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 14:16:03,774 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 14:16:03,775 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 14:16:03,775 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 14:16:03,775 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-07-21 14:16:03,775 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 26) no Hoare annotation was computed. [2020-07-21 14:16:03,775 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-07-21 14:16:03,776 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (<= 0 main_~m~0))) (or (and (<= main_~x~0 0) (<= main_~n~0 0) .cse0 .cse1) (and (<= (+ main_~m~0 1) main_~n~0) .cse0 .cse1))) [2020-07-21 14:16:03,776 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-21 14:16:03,776 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 20) no Hoare annotation was computed. [2020-07-21 14:16:03,776 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (<= 0 main_~m~0))) (or (and (<= main_~x~0 0) .cse0 (<= main_~m~0 0) .cse1) (and (<= (+ main_~m~0 1) main_~n~0) .cse0 .cse1))) [2020-07-21 14:16:03,776 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (<= 0 main_~m~0))) (or (and (<= main_~x~0 0) (<= main_~n~0 0) .cse0 .cse1) (and (<= (+ main_~m~0 1) main_~n~0) .cse0 .cse1))) [2020-07-21 14:16:03,777 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 26) no Hoare annotation was computed. [2020-07-21 14:16:03,777 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 14:16:03,777 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 14:16:03,777 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 14:16:03,777 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 14:16:03,784 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 14:16:03,784 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 14:16:03,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:16:03 BoogieIcfgContainer [2020-07-21 14:16:03,809 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 14:16:03,813 INFO L168 Benchmark]: Toolchain (without parser) took 3128.17 ms. Allocated memory was 143.1 MB in the beginning and 234.4 MB in the end (delta: 91.2 MB). Free memory was 104.2 MB in the beginning and 150.0 MB in the end (delta: -45.8 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. [2020-07-21 14:16:03,819 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 143.1 MB. Free memory was 122.5 MB in the beginning and 122.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 14:16:03,820 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.39 ms. Allocated memory is still 143.1 MB. Free memory was 104.0 MB in the beginning and 94.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 14:16:03,822 INFO L168 Benchmark]: Boogie Preprocessor took 114.50 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 94.5 MB in the beginning and 184.5 MB in the end (delta: -90.0 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-07-21 14:16:03,823 INFO L168 Benchmark]: RCFGBuilder took 252.20 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 171.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-07-21 14:16:03,824 INFO L168 Benchmark]: TraceAbstraction took 2535.04 ms. Allocated memory was 204.5 MB in the beginning and 234.4 MB in the end (delta: 29.9 MB). Free memory was 170.5 MB in the beginning and 150.0 MB in the end (delta: 20.5 MB). Peak memory consumption was 50.3 MB. Max. memory is 7.1 GB. [2020-07-21 14:16:03,840 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 143.1 MB. Free memory was 122.5 MB in the beginning and 122.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 221.39 ms. Allocated memory is still 143.1 MB. Free memory was 104.0 MB in the beginning and 94.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.50 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 94.5 MB in the beginning and 184.5 MB in the end (delta: -90.0 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 252.20 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 171.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2535.04 ms. Allocated memory was 204.5 MB in the beginning and 234.4 MB in the end (delta: 29.9 MB). Free memory was 170.5 MB in the beginning and 150.0 MB in the end (delta: 20.5 MB). Peak memory consumption was 50.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((x <= 0 && 0 <= x) && m <= 0) && 0 <= m) || ((m + 1 <= n && 0 <= x) && 0 <= m) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 37 SDslu, 244 SDs, 0 SdLazy, 129 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=1, 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, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 15 PreInvPairs, 23 NumberOfFragments, 83 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 3748 SizeOfPredicates, 16 NumberOfNonLiveVariables, 190 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 9/13 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...