/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:32:49,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:32:49,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:32:49,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:32:49,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:32:49,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:32:49,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:32:49,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:32:49,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:32:49,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:32:49,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:32:49,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:32:49,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:32:49,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:32:49,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:32:49,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:32:49,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:32:49,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:32:49,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:32:49,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:32:49,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:32:49,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:32:49,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:32:49,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:32:49,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:32:49,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:32:49,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:32:49,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:32:49,479 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 14:32:49,517 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:32:49,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:32:49,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:32:49,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:32:49,525 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:32:49,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:32:49,526 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:32:49,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:32:49,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:32:49,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:32:49,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:32:49,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:32:49,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:32:49,527 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:32:49,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:32:49,528 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:32:49,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:32:49,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:32:49,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:32:49,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:32:49,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:32:49,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:32:49,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:32:49,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:32:49,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:32:49,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:32:49,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:32:49,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:32:49,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:32:49,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 14:32:49,837 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:32:49,850 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:32:49,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:32:49,855 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:32:49,855 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:32:49,856 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-20 14:32:49,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37aa959a8/d821f272aebe44cbb8a6dc9f7b2e8983/FLAGf9cdfc738 [2020-07-20 14:32:50,363 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:32:50,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-20 14:32:50,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37aa959a8/d821f272aebe44cbb8a6dc9f7b2e8983/FLAGf9cdfc738 [2020-07-20 14:32:50,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37aa959a8/d821f272aebe44cbb8a6dc9f7b2e8983 [2020-07-20 14:32:50,795 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:32:50,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:32:50,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:32:50,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:32:50,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:32:50,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:32:50" (1/1) ... [2020-07-20 14:32:50,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478c2760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:32:50, skipping insertion in model container [2020-07-20 14:32:50,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:32:50" (1/1) ... [2020-07-20 14:32:50,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:32:50,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:32:51,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:32:51,016 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:32:51,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:32:51,047 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:32:51,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:32:51 WrapperNode [2020-07-20 14:32:51,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:32:51,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:32:51,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:32:51,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:32:51,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:32:51" (1/1) ... [2020-07-20 14:32:51,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:32:51" (1/1) ... [2020-07-20 14:32:51,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:32:51" (1/1) ... [2020-07-20 14:32:51,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:32:51" (1/1) ... [2020-07-20 14:32:51,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:32:51" (1/1) ... [2020-07-20 14:32:51,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:32:51" (1/1) ... [2020-07-20 14:32:51,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:32:51" (1/1) ... [2020-07-20 14:32:51,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:32:51,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:32:51,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:32:51,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:32:51,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:32:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:32:51,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:32:51,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:32:51,236 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:32:51,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:32:51,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:32:51,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:32:51,237 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:32:51,238 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:32:51,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:32:51,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:32:51,240 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:32:51,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:32:51,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:32:51,456 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:32:51,456 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:32:51,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:32:51 BoogieIcfgContainer [2020-07-20 14:32:51,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:32:51,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:32:51,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:32:51,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:32:51,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:32:50" (1/3) ... [2020-07-20 14:32:51,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e46d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:32:51, skipping insertion in model container [2020-07-20 14:32:51,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:32:51" (2/3) ... [2020-07-20 14:32:51,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e46d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:32:51, skipping insertion in model container [2020-07-20 14:32:51,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:32:51" (3/3) ... [2020-07-20 14:32:51,469 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-07-20 14:32:51,484 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:32:51,492 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:32:51,513 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:32:51,543 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:32:51,543 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:32:51,544 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:32:51,544 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:32:51,544 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:32:51,544 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:32:51,544 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:32:51,545 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:32:51,574 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-20 14:32:51,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 14:32:51,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:32:51,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:32:51,583 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:32:51,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:32:51,590 INFO L82 PathProgramCache]: Analyzing trace with hash -917653371, now seen corresponding path program 1 times [2020-07-20 14:32:51,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:32:51,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850540137] [2020-07-20 14:32:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:32:51,671 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:32:51,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:32:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:32:51,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:32:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:32:51,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:32:51,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850540137] [2020-07-20 14:32:51,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:32:51,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:32:51,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092694788] [2020-07-20 14:32:51,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:32:51,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:32:51,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:32:51,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:32:51,737 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-07-20 14:32:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:32:51,787 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-07-20 14:32:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:32:51,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-20 14:32:51,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:32:51,795 INFO L225 Difference]: With dead ends: 42 [2020-07-20 14:32:51,795 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 14:32:51,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:32:51,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 14:32:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 14:32:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 14:32:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 14:32:51,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-07-20 14:32:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:32:51,842 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 14:32:51,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:32:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 14:32:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 14:32:51,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:32:51,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:32:52,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:32:52,058 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:32:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:32:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash -941431669, now seen corresponding path program 1 times [2020-07-20 14:32:52,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:32:52,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224215848] [2020-07-20 14:32:52,062 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:32:52,092 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:32:52,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:32:52,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 14:32:52,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:32:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:32:52,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:32:52,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224215848] [2020-07-20 14:32:52,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:32:52,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:32:52,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701741984] [2020-07-20 14:32:52,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:32:52,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:32:52,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:32:52,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:32:52,162 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-20 14:32:52,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:32:52,202 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-07-20 14:32:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 14:32:52,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 14:32:52,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:32:52,204 INFO L225 Difference]: With dead ends: 23 [2020-07-20 14:32:52,204 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 14:32:52,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:32:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 14:32:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 14:32:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 14:32:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-07-20 14:32:52,211 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-07-20 14:32:52,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:32:52,212 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-07-20 14:32:52,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:32:52,212 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-07-20 14:32:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 14:32:52,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:32:52,213 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:32:52,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:32:52,429 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:32:52,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:32:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash 447870728, now seen corresponding path program 1 times [2020-07-20 14:32:52,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:32:52,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444922340] [2020-07-20 14:32:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:32:52,475 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:32:52,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:32:52,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:32:52,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:32:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:32:52,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:32:52,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444922340] [2020-07-20 14:32:52,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:32:52,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 14:32:52,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337779067] [2020-07-20 14:32:52,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 14:32:52,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:32:52,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 14:32:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:32:52,510 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-07-20 14:32:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:32:52,540 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-07-20 14:32:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 14:32:52,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-20 14:32:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:32:52,544 INFO L225 Difference]: With dead ends: 31 [2020-07-20 14:32:52,544 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 14:32:52,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:32:52,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 14:32:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-07-20 14:32:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 14:32:52,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 14:32:52,551 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-07-20 14:32:52,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:32:52,551 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 14:32:52,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 14:32:52,552 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 14:32:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 14:32:52,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:32:52,553 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:32:52,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:32:52,769 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:32:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:32:52,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1257217354, now seen corresponding path program 1 times [2020-07-20 14:32:52,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:32:52,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3774465] [2020-07-20 14:32:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:32:52,813 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:32:52,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:32:52,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 14:32:52,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:32:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:32:52,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:32:52,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:32:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:32:53,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3774465] [2020-07-20 14:32:53,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:32:53,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 14:32:53,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948880514] [2020-07-20 14:32:53,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 14:32:53,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:32:53,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 14:32:53,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-20 14:32:53,032 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-07-20 14:32:53,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:32:53,123 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-07-20 14:32:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 14:32:53,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-07-20 14:32:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:32:53,125 INFO L225 Difference]: With dead ends: 26 [2020-07-20 14:32:53,125 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 14:32:53,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:32:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 14:32:53,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 14:32:53,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 14:32:53,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-20 14:32:53,130 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-07-20 14:32:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:32:53,131 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-20 14:32:53,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 14:32:53,131 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-20 14:32:53,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 14:32:53,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:32:53,133 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:32:53,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:32:53,347 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:32:53,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:32:53,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2145316375, now seen corresponding path program 1 times [2020-07-20 14:32:53,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:32:53,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351968336] [2020-07-20 14:32:53,350 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:32:53,390 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 14:32:53,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:32:53,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 14:32:53,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:32:53,423 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:32:53,426 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-20 14:32:53,429 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 14:32:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:32:53,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:32:53,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351968336] [2020-07-20 14:32:53,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:32:53,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:32:53,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920296015] [2020-07-20 14:32:53,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:32:53,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:32:53,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:32:53,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:32:53,452 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2020-07-20 14:32:53,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:32:53,466 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-07-20 14:32:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:32:53,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 14:32:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:32:53,467 INFO L225 Difference]: With dead ends: 29 [2020-07-20 14:32:53,467 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 14:32:53,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:32:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 14:32:53,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 14:32:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 14:32:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-20 14:32:53,472 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 19 [2020-07-20 14:32:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:32:53,473 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-20 14:32:53,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:32:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-20 14:32:53,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 14:32:53,474 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:32:53,474 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:32:53,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:32:53,688 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:32:53,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:32:53,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1335969749, now seen corresponding path program 2 times [2020-07-20 14:32:53,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:32:53,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109385073] [2020-07-20 14:32:53,691 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:32:53,726 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:32:53,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:32:53,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 14:32:53,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:32:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:32:53,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:32:53,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:32:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:32:53,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109385073] [2020-07-20 14:32:53,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:32:53,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 14:32:53,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112579065] [2020-07-20 14:32:53,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 14:32:53,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:32:53,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 14:32:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-07-20 14:32:53,990 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 14 states. [2020-07-20 14:33:08,693 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 14:33:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:33:08,729 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 14:33:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 14:33:08,730 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-07-20 14:33:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:33:08,730 INFO L225 Difference]: With dead ends: 25 [2020-07-20 14:33:08,730 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 14:33:08,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=76, Invalid=302, Unknown=2, NotChecked=0, Total=380 [2020-07-20 14:33:08,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 14:33:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 14:33:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 14:33:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 14:33:08,733 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-07-20 14:33:08,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:33:08,733 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 14:33:08,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 14:33:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 14:33:08,734 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 14:33:08,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:33:08,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 14:33:11,673 WARN L193 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-07-20 14:33:11,677 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 14:33:11,677 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:33:11,677 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:33:11,677 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 14:33:11,677 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 14:33:11,677 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 14:33:11,678 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 14:33:11,678 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 14:33:11,678 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 14:33:11,678 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 14:33:11,678 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 38) no Hoare annotation was computed. [2020-07-20 14:33:11,678 INFO L268 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-07-20 14:33:11,678 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 38) no Hoare annotation was computed. [2020-07-20 14:33:11,678 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-20 14:33:11,679 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 38) the Hoare annotation is: true [2020-07-20 14:33:11,679 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-20 14:33:11,679 INFO L268 CegarLoopResult]: For program point L28-2(lines 13 38) no Hoare annotation was computed. [2020-07-20 14:33:11,679 INFO L268 CegarLoopResult]: For program point L24(lines 24 33) no Hoare annotation was computed. [2020-07-20 14:33:11,679 INFO L268 CegarLoopResult]: For program point L24-2(lines 13 38) no Hoare annotation was computed. [2020-07-20 14:33:11,679 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (or (and (= (mod (+ main_~j~0 main_~b~0 (* main_~i~0 4294967295)) 4294967296) (mod (+ main_~a~0 1) 4294967296)) (= (mod (+ main_~a~0 2) 4294967296) (mod (+ (* main_~j~0 2) main_~b~0 (* main_~i~0 4294967294)) 4294967296)) (<= (mod main_~i~0 2) 0)) (and (= 1 main_~b~0) (= 1 main_~a~0)) (and (= 0 main_~a~0) (= 0 main_~b~0))) [2020-07-20 14:33:11,679 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 14:33:11,679 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 14:33:11,679 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 14:33:11,680 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 14:33:11,680 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 14:33:11,680 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 14:33:11,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:33:11 BoogieIcfgContainer [2020-07-20 14:33:11,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:33:11,689 INFO L168 Benchmark]: Toolchain (without parser) took 20891.15 ms. Allocated memory was 144.7 MB in the beginning and 233.8 MB in the end (delta: 89.1 MB). Free memory was 102.2 MB in the beginning and 124.2 MB in the end (delta: -21.9 MB). Peak memory consumption was 67.2 MB. Max. memory is 7.1 GB. [2020-07-20 14:33:11,690 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 14:33:11,691 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.55 ms. Allocated memory is still 144.7 MB. Free memory was 102.0 MB in the beginning and 92.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-20 14:33:11,692 INFO L168 Benchmark]: Boogie Preprocessor took 118.17 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 92.3 MB in the beginning and 180.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:33:11,692 INFO L168 Benchmark]: RCFGBuilder took 293.50 ms. Allocated memory is still 201.3 MB. Free memory was 180.5 MB in the beginning and 166.1 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-20 14:33:11,693 INFO L168 Benchmark]: TraceAbstraction took 20224.26 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 166.1 MB in the beginning and 124.2 MB in the end (delta: 41.9 MB). Peak memory consumption was 74.4 MB. Max. memory is 7.1 GB. [2020-07-20 14:33:11,697 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.55 ms. Allocated memory is still 144.7 MB. Free memory was 102.0 MB in the beginning and 92.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.17 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 92.3 MB in the beginning and 180.5 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 293.50 ms. Allocated memory is still 201.3 MB. Free memory was 180.5 MB in the beginning and 166.1 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 20224.26 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 166.1 MB in the beginning and 124.2 MB in the end (delta: 41.9 MB). Peak memory consumption was 74.4 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.3s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 15.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 33 SDslu, 233 SDs, 0 SdLazy, 109 SolverSat, 10 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 12 PreInvPairs, 16 NumberOfFragments, 56 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 2.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 95 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 8739 SizeOfPredicates, 10 NumberOfNonLiveVariables, 241 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 9/27 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...