/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:13:14,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:13:14,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:13:14,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:13:14,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:13:14,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:13:14,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:13:14,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:13:14,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:13:14,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:13:14,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:13:14,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:13:14,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:13:14,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:13:14,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:13:14,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:13:14,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:13:14,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:13:14,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:13:14,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:13:14,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:13:14,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:13:14,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:13:14,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:13:14,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 23:13:14,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 23:13:14,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 23:13:14,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 23:13:14,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 23:13:14,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 23:13:14,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 23:13:14,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 23:13:14,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 23:13:14,428 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 23:13:14,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 23:13:14,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 23:13:14,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 23:13:14,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 23:13:14,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:13:14,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:13:14,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:13:14,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 23:13:14,483 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:13:14,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:13:14,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:13:14,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:13:14,489 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:13:14,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:13:14,492 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:13:14,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:13:14,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:13:14,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:13:14,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:13:14,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:13:14,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:13:14,494 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:13:14,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:13:14,494 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:13:14,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:13:14,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:13:14,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:13:14,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:13:14,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:13:14,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:13:14,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:13:14,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:13:14,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:13:14,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:13:14,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:14,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:13:14,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:13:14,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:13:14,876 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:13:14,897 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:13:14,901 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:13:14,903 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:13:14,903 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:13:14,905 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-07-21 23:13:15,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfc323bf/03122fff4d994c3589a9ca6900997428/FLAG17aec641c [2020-07-21 23:13:15,584 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:13:15,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-07-21 23:13:15,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfc323bf/03122fff4d994c3589a9ca6900997428/FLAG17aec641c [2020-07-21 23:13:15,857 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfc323bf/03122fff4d994c3589a9ca6900997428 [2020-07-21 23:13:15,869 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:13:15,872 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:13:15,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:13:15,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:13:15,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:13:15,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:15" (1/1) ... [2020-07-21 23:13:15,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@578436d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:15, skipping insertion in model container [2020-07-21 23:13:15,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:15" (1/1) ... [2020-07-21 23:13:15,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:13:15,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:13:16,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:13:16,185 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:13:16,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:13:16,223 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:13:16,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:16 WrapperNode [2020-07-21 23:13:16,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:13:16,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:13:16,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:13:16,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:13:16,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:16" (1/1) ... [2020-07-21 23:13:16,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:16" (1/1) ... [2020-07-21 23:13:16,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:16" (1/1) ... [2020-07-21 23:13:16,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:16" (1/1) ... [2020-07-21 23:13:16,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:16" (1/1) ... [2020-07-21 23:13:16,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:16" (1/1) ... [2020-07-21 23:13:16,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:16" (1/1) ... [2020-07-21 23:13:16,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:13:16,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:13:16,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:13:16,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:13:16,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:13:16,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:13:16,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:13:16,400 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:13:16,400 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:13:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:13:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:13:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:13:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:13:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:13:16,590 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:13:16,590 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:13:16,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:16 BoogieIcfgContainer [2020-07-21 23:13:16,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:13:16,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:13:16,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:13:16,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:13:16,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:13:15" (1/3) ... [2020-07-21 23:13:16,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20335ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:16, skipping insertion in model container [2020-07-21 23:13:16,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:16" (2/3) ... [2020-07-21 23:13:16,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20335ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:16, skipping insertion in model container [2020-07-21 23:13:16,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:16" (3/3) ... [2020-07-21 23:13:16,602 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-07-21 23:13:16,613 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:13:16,621 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:13:16,637 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:13:16,664 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:13:16,664 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:13:16,664 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:13:16,664 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:13:16,664 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:13:16,665 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:13:16,665 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:13:16,665 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:13:16,697 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 23:13:16,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 23:13:16,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:13:16,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:13:16,715 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:13:16,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:13:16,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-07-21 23:13:16,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:13:16,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612935499] [2020-07-21 23:13:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:16,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:13:16,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:13:16,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:13:16,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:13:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:13:16,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:13:17,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612935499] [2020-07-21 23:13:17,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:13:17,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:13:17,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740383727] [2020-07-21 23:13:17,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:13:17,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:13:17,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:13:17,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:13:17,084 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-07-21 23:13:17,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:13:17,174 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 23:13:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:13:17,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 23:13:17,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:13:17,199 INFO L225 Difference]: With dead ends: 29 [2020-07-21 23:13:17,199 INFO L226 Difference]: Without dead ends: 12 [2020-07-21 23:13:17,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:13:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-21 23:13:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-21 23:13:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-21 23:13:17,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-21 23:13:17,278 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-21 23:13:17,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:13:17,279 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-21 23:13:17,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:13:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-21 23:13:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:13:17,281 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:13:17,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:13:17,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:17,485 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:13:17,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:13:17,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-07-21 23:13:17,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:13:17,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112770754] [2020-07-21 23:13:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:17,535 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:13:17,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:13:17,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:13:17,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:13:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:13:17,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:13:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:13:17,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112770754] [2020-07-21 23:13:17,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:13:17,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 23:13:17,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076325306] [2020-07-21 23:13:17,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 23:13:17,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:13:17,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 23:13:17,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:13:17,699 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-07-21 23:13:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:13:17,816 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-21 23:13:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 23:13:17,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-21 23:13:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:13:17,819 INFO L225 Difference]: With dead ends: 20 [2020-07-21 23:13:17,820 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 23:13:17,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:13:17,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 23:13:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 23:13:17,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 23:13:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-21 23:13:17,831 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-07-21 23:13:17,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:13:17,832 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-21 23:13:17,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 23:13:17,833 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-21 23:13:17,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 23:13:17,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:13:17,835 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:13:18,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:18,052 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:13:18,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:13:18,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times [2020-07-21 23:13:18,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:13:18,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162727105] [2020-07-21 23:13:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:18,103 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:13:18,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:13:18,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 23:13:18,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:13:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:13:18,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:13:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:13:18,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162727105] [2020-07-21 23:13:18,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:13:18,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 23:13:18,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697380109] [2020-07-21 23:13:18,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 23:13:18,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:13:18,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 23:13:18,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:13:18,408 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-21 23:13:18,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:13:18,544 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-07-21 23:13:18,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:13:18,546 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-21 23:13:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:13:18,547 INFO L225 Difference]: With dead ends: 22 [2020-07-21 23:13:18,547 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 23:13:18,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:13:18,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 23:13:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 23:13:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 23:13:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 23:13:18,559 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-21 23:13:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:13:18,561 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 23:13:18,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 23:13:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 23:13:18,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 23:13:18,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:13:18,563 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:13:18,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:18,779 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:13:18,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:13:18,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 3 times [2020-07-21 23:13:18,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:13:18,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471864045] [2020-07-21 23:13:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:18,835 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:13:18,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:13:18,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 23:13:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:13:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:13:19,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:13:19,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:13:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:13:19,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471864045] [2020-07-21 23:13:19,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:13:19,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2020-07-21 23:13:19,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441567636] [2020-07-21 23:13:19,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 23:13:19,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:13:19,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 23:13:19,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-07-21 23:13:19,763 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 19 states. [2020-07-21 23:13:20,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:13:20,037 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-07-21 23:13:20,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 23:13:20,037 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 16 [2020-07-21 23:13:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:13:20,038 INFO L225 Difference]: With dead ends: 21 [2020-07-21 23:13:20,038 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 23:13:20,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-07-21 23:13:20,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 23:13:20,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 23:13:20,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 23:13:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 23:13:20,044 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-21 23:13:20,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:13:20,044 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 23:13:20,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 23:13:20,045 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 23:13:20,045 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 23:13:20,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:13:20,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 23:13:20,562 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 23:13:20,563 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:13:20,563 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:13:20,564 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 23:13:20,564 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:13:20,564 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:13:20,565 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2020-07-21 23:13:20,565 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2020-07-21 23:13:20,565 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2020-07-21 23:13:20,566 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: (or (= 4 main_~x~0) (= 1 main_~x~0) (= 6 main_~x~0) (= 5 main_~x~0) (= 0 main_~x~0) (= 2 main_~x~0) (= 3 main_~x~0)) [2020-07-21 23:13:20,566 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 17) the Hoare annotation is: (= 6 main_~x~0) [2020-07-21 23:13:20,566 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 23:13:20,566 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 23:13:20,567 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 23:13:20,567 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 23:13:20,567 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 23:13:20,568 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 23:13:20,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:13:20 BoogieIcfgContainer [2020-07-21 23:13:20,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:13:20,607 INFO L168 Benchmark]: Toolchain (without parser) took 4734.44 ms. Allocated memory was 136.3 MB in the beginning and 229.6 MB in the end (delta: 93.3 MB). Free memory was 100.4 MB in the beginning and 152.7 MB in the end (delta: -52.3 MB). Peak memory consumption was 41.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:13:20,609 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 136.3 MB. Free memory was 118.2 MB in the beginning and 117.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 23:13:20,611 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.14 ms. Allocated memory is still 136.3 MB. Free memory was 100.0 MB in the beginning and 90.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 23:13:20,613 INFO L168 Benchmark]: Boogie Preprocessor took 111.11 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 90.7 MB in the beginning and 181.0 MB in the end (delta: -90.3 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-21 23:13:20,615 INFO L168 Benchmark]: RCFGBuilder took 258.23 ms. Allocated memory is still 200.8 MB. Free memory was 181.0 MB in the beginning and 168.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-07-21 23:13:20,617 INFO L168 Benchmark]: TraceAbstraction took 4007.11 ms. Allocated memory was 200.8 MB in the beginning and 229.6 MB in the end (delta: 28.8 MB). Free memory was 168.1 MB in the beginning and 152.7 MB in the end (delta: 15.5 MB). Peak memory consumption was 44.3 MB. Max. memory is 7.1 GB. [2020-07-21 23:13:20,622 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 136.3 MB. Free memory was 118.2 MB in the beginning and 117.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 346.14 ms. Allocated memory is still 136.3 MB. Free memory was 100.0 MB in the beginning and 90.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.11 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 90.7 MB in the beginning and 181.0 MB in the end (delta: -90.3 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 258.23 ms. Allocated memory is still 200.8 MB. Free memory was 181.0 MB in the beginning and 168.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4007.11 ms. Allocated memory was 200.8 MB in the beginning and 229.6 MB in the end (delta: 28.8 MB). Free memory was 168.1 MB in the beginning and 152.7 MB in the end (delta: 15.5 MB). Peak memory consumption was 44.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: (((((4 == x || 1 == x) || 6 == x) || 5 == x) || 0 == x) || 2 == x) || 3 == x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 2 SDslu, 160 SDs, 0 SdLazy, 152 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 19 NumberOfFragments, 30 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 25 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 51 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 3551 SizeOfPredicates, 5 NumberOfNonLiveVariables, 136 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/64 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...