/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:45:10,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:45:10,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:45:10,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:45:10,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:45:10,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:45:10,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:45:10,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:45:10,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:45:10,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:45:10,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:45:10,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:45:10,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:45:10,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:45:10,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:45:10,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:45:10,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:45:10,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:45:10,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:45:11,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:45:11,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:45:11,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:45:11,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:45:11,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:45:11,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:45:11,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:45:11,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:45:11,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:45:11,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:45:11,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:45:11,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:45:11,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:45:11,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:45:11,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:45:11,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:45:11,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:45:11,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:45:11,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:45:11,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:45:11,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:45:11,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:45:11,025 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 11:45:11,039 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:45:11,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:45:11,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:45:11,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:45:11,041 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:45:11,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:45:11,042 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:45:11,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:45:11,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:45:11,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:45:11,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:45:11,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:45:11,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:45:11,043 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:45:11,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:45:11,044 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:45:11,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:45:11,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:45:11,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:45:11,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:45:11,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:45:11,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:45:11,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:45:11,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:45:11,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:45:11,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:45:11,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:45:11,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:45:11,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:45:11,047 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 -> NOT_INCREMENTALLY [2020-07-21 11:45:11,336 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:45:11,358 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:45:11,364 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:45:11,366 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:45:11,367 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:45:11,369 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-21 11:45:11,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4630d90b4/c77569e594804fc49246d703e421e0f0/FLAG51eb1fb9d [2020-07-21 11:45:11,950 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:45:11,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-21 11:45:11,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4630d90b4/c77569e594804fc49246d703e421e0f0/FLAG51eb1fb9d [2020-07-21 11:45:12,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4630d90b4/c77569e594804fc49246d703e421e0f0 [2020-07-21 11:45:12,324 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:45:12,328 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:45:12,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:45:12,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:45:12,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:45:12,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:45:12" (1/1) ... [2020-07-21 11:45:12,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2faaa317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:45:12, skipping insertion in model container [2020-07-21 11:45:12,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:45:12" (1/1) ... [2020-07-21 11:45:12,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:45:12,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:45:12,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:45:12,537 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:45:12,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:45:12,572 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:45:12,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:45:12 WrapperNode [2020-07-21 11:45:12,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:45:12,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:45:12,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:45:12,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:45:12,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:45:12" (1/1) ... [2020-07-21 11:45:12,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:45:12" (1/1) ... [2020-07-21 11:45:12,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:45:12" (1/1) ... [2020-07-21 11:45:12,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:45:12" (1/1) ... [2020-07-21 11:45:12,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:45:12" (1/1) ... [2020-07-21 11:45:12,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:45:12" (1/1) ... [2020-07-21 11:45:12,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:45:12" (1/1) ... [2020-07-21 11:45:12,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:45:12,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:45:12,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:45:12,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:45:12,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:45:12" (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 11:45:12,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:45:12,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:45:12,758 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:45:12,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:45:12,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:45:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:45:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:45:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:45:12,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:45:12,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:45:12,761 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:45:12,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:45:12,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:45:13,001 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:45:13,001 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 11:45:13,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:45:13 BoogieIcfgContainer [2020-07-21 11:45:13,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:45:13,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:45:13,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:45:13,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:45:13,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:45:12" (1/3) ... [2020-07-21 11:45:13,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c682a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:45:13, skipping insertion in model container [2020-07-21 11:45:13,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:45:12" (2/3) ... [2020-07-21 11:45:13,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c682a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:45:13, skipping insertion in model container [2020-07-21 11:45:13,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:45:13" (3/3) ... [2020-07-21 11:45:13,018 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-07-21 11:45:13,031 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:45:13,039 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:45:13,056 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:45:13,119 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:45:13,119 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:45:13,122 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:45:13,123 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:45:13,123 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:45:13,123 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:45:13,123 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:45:13,123 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:45:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-21 11:45:13,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 11:45:13,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:45:13,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:45:13,189 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:45:13,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:45:13,196 INFO L82 PathProgramCache]: Analyzing trace with hash 404168940, now seen corresponding path program 1 times [2020-07-21 11:45:13,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:45:13,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000942082] [2020-07-21 11:45:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:45:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:45:13,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:45:13,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:45:13,330 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:45:13,373 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 11:45:13,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:45:13,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000942082] [2020-07-21 11:45:13,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:45:13,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:45:13,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787515841] [2020-07-21 11:45:13,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:45:13,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:45:13,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:45:13,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:45:13,400 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-21 11:45:13,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:45:13,542 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2020-07-21 11:45:13,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:45:13,544 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-21 11:45:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:45:13,556 INFO L225 Difference]: With dead ends: 57 [2020-07-21 11:45:13,557 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 11:45:13,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:45:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 11:45:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 11:45:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 11:45:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-21 11:45:13,613 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-07-21 11:45:13,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:45:13,614 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-21 11:45:13,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:45:13,615 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-21 11:45:13,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:45:13,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:45:13,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:45:13,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:45:13,831 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:45:13,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:45:13,833 INFO L82 PathProgramCache]: Analyzing trace with hash -849304486, now seen corresponding path program 1 times [2020-07-21 11:45:13,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:45:13,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490452119] [2020-07-21 11:45:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:45:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:45:13,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:45:13,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:45:13,892 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:45:13,925 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 11:45:13,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:45:13,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490452119] [2020-07-21 11:45:13,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:45:13,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 11:45:13,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703757638] [2020-07-21 11:45:13,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:45:13,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:45:13,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:45:13,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:45:13,930 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-07-21 11:45:14,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:45:14,185 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-21 11:45:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 11:45:14,186 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-21 11:45:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:45:14,188 INFO L225 Difference]: With dead ends: 40 [2020-07-21 11:45:14,188 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 11:45:14,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:45:14,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 11:45:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-07-21 11:45:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 11:45:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 11:45:14,213 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2020-07-21 11:45:14,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:45:14,214 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 11:45:14,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:45:14,215 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 11:45:14,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:45:14,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:45:14,221 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:45:14,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:45:14,428 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:45:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:45:14,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1573212483, now seen corresponding path program 1 times [2020-07-21 11:45:14,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:45:14,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708491276] [2020-07-21 11:45:14,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:45:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:45:14,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:45:14,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:45:14,482 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:45:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:45:14,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:45:14,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708491276] [2020-07-21 11:45:14,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:45:14,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:45:14,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178025247] [2020-07-21 11:45:14,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:45:14,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:45:14,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:45:14,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:45:14,520 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2020-07-21 11:45:14,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:45:14,608 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-07-21 11:45:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:45:14,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-21 11:45:14,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:45:14,610 INFO L225 Difference]: With dead ends: 45 [2020-07-21 11:45:14,610 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 11:45:14,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:45:14,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 11:45:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-21 11:45:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 11:45:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-21 11:45:14,633 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2020-07-21 11:45:14,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:45:14,633 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-21 11:45:14,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:45:14,634 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-21 11:45:14,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 11:45:14,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:45:14,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:45:14,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:45:14,837 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:45:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:45:14,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1604756500, now seen corresponding path program 1 times [2020-07-21 11:45:14,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:45:14,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112509722] [2020-07-21 11:45:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:45:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:45:14,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:45:14,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:45:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 11:45:14,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:45:14,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112509722] [2020-07-21 11:45:14,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:45:14,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:45:14,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29114111] [2020-07-21 11:45:14,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:45:14,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:45:14,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:45:14,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:45:14,959 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 5 states. [2020-07-21 11:45:19,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:45:19,251 INFO L93 Difference]: Finished difference Result 106 states and 136 transitions. [2020-07-21 11:45:19,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:45:19,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-21 11:45:19,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:45:19,254 INFO L225 Difference]: With dead ends: 106 [2020-07-21 11:45:19,255 INFO L226 Difference]: Without dead ends: 71 [2020-07-21 11:45:19,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:45:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-21 11:45:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2020-07-21 11:45:19,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 11:45:19,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-07-21 11:45:19,270 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 24 [2020-07-21 11:45:19,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:45:19,271 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-07-21 11:45:19,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:45:19,271 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-07-21 11:45:19,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 11:45:19,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:45:19,272 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:45:19,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:45:19,481 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:45:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:45:19,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1598241856, now seen corresponding path program 1 times [2020-07-21 11:45:19,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:45:19,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335474178] [2020-07-21 11:45:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2020-07-21 11:45:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:45:19,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:45:19,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:45:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 11:45:19,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:45:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 11:45:19,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335474178] [2020-07-21 11:45:19,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:45:19,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-21 11:45:19,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21619096] [2020-07-21 11:45:19,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:45:19,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:45:19,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:45:19,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:45:19,604 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 6 states. [2020-07-21 11:45:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:45:19,709 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2020-07-21 11:45:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 11:45:19,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-07-21 11:45:19,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:45:19,712 INFO L225 Difference]: With dead ends: 82 [2020-07-21 11:45:19,712 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 11:45:19,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:45:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 11:45:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-07-21 11:45:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-21 11:45:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-07-21 11:45:19,728 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 31 [2020-07-21 11:45:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:45:19,729 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-07-21 11:45:19,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:45:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-07-21 11:45:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 11:45:19,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:45:19,734 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:45:19,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:45:19,935 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:45:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:45:19,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2099424040, now seen corresponding path program 1 times [2020-07-21 11:45:19,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:45:19,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507222102] [2020-07-21 11:45:19,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 11:45:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:45:19,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 11:45:19,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:45:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 11:45:20,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:45:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 11:45:20,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507222102] [2020-07-21 11:45:20,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:45:20,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-21 11:45:20,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767219534] [2020-07-21 11:45:20,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 11:45:20,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:45:20,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 11:45:20,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-07-21 11:45:20,166 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 13 states. [2020-07-21 11:45:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:45:20,492 INFO L93 Difference]: Finished difference Result 120 states and 156 transitions. [2020-07-21 11:45:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 11:45:20,493 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-07-21 11:45:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:45:20,495 INFO L225 Difference]: With dead ends: 120 [2020-07-21 11:45:20,496 INFO L226 Difference]: Without dead ends: 86 [2020-07-21 11:45:20,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-07-21 11:45:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-21 11:45:20,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-07-21 11:45:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 11:45:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-07-21 11:45:20,517 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 34 [2020-07-21 11:45:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:45:20,517 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-07-21 11:45:20,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 11:45:20,517 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-07-21 11:45:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 11:45:20,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:45:20,519 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:45:20,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:45:20,736 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:45:20,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:45:20,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1702845076, now seen corresponding path program 2 times [2020-07-21 11:45:20,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:45:20,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792714284] [2020-07-21 11:45:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:45:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:45:20,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:45:20,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:45:20,796 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:45:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 11:45:20,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:45:20,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792714284] [2020-07-21 11:45:20,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:45:20,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 11:45:20,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402336073] [2020-07-21 11:45:20,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:45:20,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:45:20,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:45:20,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:45:20,818 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 6 states. [2020-07-21 11:45:20,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:45:20,918 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2020-07-21 11:45:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 11:45:20,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-21 11:45:20,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:45:20,920 INFO L225 Difference]: With dead ends: 71 [2020-07-21 11:45:20,920 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 11:45:20,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:45:20,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 11:45:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2020-07-21 11:45:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-21 11:45:20,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-07-21 11:45:20,935 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 38 [2020-07-21 11:45:20,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:45:20,935 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-07-21 11:45:20,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:45:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-07-21 11:45:20,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 11:45:20,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:45:20,937 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:45:21,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:45:21,148 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:45:21,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:45:21,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1550723981, now seen corresponding path program 1 times [2020-07-21 11:45:21,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:45:21,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310688106] [2020-07-21 11:45:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:45:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:45:21,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:45:21,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:45:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-21 11:45:21,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:45:21,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310688106] [2020-07-21 11:45:21,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:45:21,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:45:21,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904641413] [2020-07-21 11:45:21,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:45:21,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:45:21,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:45:21,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:45:21,205 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 4 states. [2020-07-21 11:45:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:45:21,271 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-07-21 11:45:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:45:21,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-07-21 11:45:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:45:21,273 INFO L225 Difference]: With dead ends: 86 [2020-07-21 11:45:21,273 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:45:21,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:45:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:45:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:45:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:45:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:45:21,275 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2020-07-21 11:45:21,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:45:21,275 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:45:21,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:45:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:45:21,276 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:45:21,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:45:21,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:45:22,007 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 11:45:22,008 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:45:22,008 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:45:22,008 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 11:45:22,008 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:45:22,008 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:45:22,008 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 11:45:22,009 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 11:45:22,009 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 11:45:22,009 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 11:45:22,009 INFO L268 CegarLoopResult]: For program point L31(lines 23 33) no Hoare annotation was computed. [2020-07-21 11:45:22,009 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 37) no Hoare annotation was computed. [2020-07-21 11:45:22,009 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 33) the Hoare annotation is: (let ((.cse2 (* 2 main_~i~0))) (let ((.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= .cse2 main_~j~0))) (or (and (<= main_~k~0 main_~n~0) .cse0 .cse1) (and (<= main_~i~0 0) (<= main_~k~0 (+ .cse2 1)) (<= main_~k~0 main_~j~0) .cse0 .cse1)))) [2020-07-21 11:45:22,009 INFO L268 CegarLoopResult]: For program point L24(lines 24 32) no Hoare annotation was computed. [2020-07-21 11:45:22,009 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 27) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (< main_~j~0 main_~n~0) (<= .cse0 main_~k~0) (<= main_~k~0 main_~n~0) (<= .cse0 main_~j~0))) [2020-07-21 11:45:22,009 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-21 11:45:22,009 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 37) no Hoare annotation was computed. [2020-07-21 11:45:22,010 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (< main_~j~0 main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-21 11:45:22,010 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-07-21 11:45:22,010 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (< main_~j~0 main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-21 11:45:22,010 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (< main_~j~0 main_~n~0) (<= (+ main_~k~0 1) main_~n~0) (<= .cse0 main_~k~0) (<= .cse0 main_~j~0))) [2020-07-21 11:45:22,010 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 27) no Hoare annotation was computed. [2020-07-21 11:45:22,010 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 34) no Hoare annotation was computed. [2020-07-21 11:45:22,011 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 34) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 main_~n~0)) (.cse1 (<= main_~n~0 main_~k~0)) (.cse3 (<= main_~n~0 main_~j~0))) (or (and (<= main_~i~0 0) .cse0 .cse1) (let ((.cse2 (div (+ (* main_~n~0 (- 1)) 1) (- 2)))) (and (<= .cse2 0) (< main_~k~0 (+ main_~i~0 1)) (<= (+ .cse2 1) main_~i~0) .cse1 .cse3)) (and .cse0 .cse1 .cse3))) [2020-07-21 11:45:22,011 INFO L268 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-07-21 11:45:22,011 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 21) no Hoare annotation was computed. [2020-07-21 11:45:22,011 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-07-21 11:45:22,011 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 11:45:22,011 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 11:45:22,011 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 11:45:22,012 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 11:45:22,012 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 11:45:22,012 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 11:45:22,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:45:22 BoogieIcfgContainer [2020-07-21 11:45:22,031 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:45:22,034 INFO L168 Benchmark]: Toolchain (without parser) took 9707.01 ms. Allocated memory was 137.9 MB in the beginning and 245.4 MB in the end (delta: 107.5 MB). Free memory was 102.9 MB in the beginning and 137.3 MB in the end (delta: -34.4 MB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:45:22,035 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:45:22,035 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.56 ms. Allocated memory is still 137.9 MB. Free memory was 102.5 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:45:22,036 INFO L168 Benchmark]: Boogie Preprocessor took 35.20 ms. Allocated memory is still 137.9 MB. Free memory was 92.9 MB in the beginning and 91.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:45:22,037 INFO L168 Benchmark]: RCFGBuilder took 400.02 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 91.2 MB in the beginning and 167.1 MB in the end (delta: -75.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:45:22,038 INFO L168 Benchmark]: TraceAbstraction took 9020.62 ms. Allocated memory was 202.4 MB in the beginning and 245.4 MB in the end (delta: 43.0 MB). Free memory was 166.4 MB in the beginning and 137.3 MB in the end (delta: 29.2 MB). Peak memory consumption was 72.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:45:22,042 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.56 ms. Allocated memory is still 137.9 MB. Free memory was 102.5 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.20 ms. Allocated memory is still 137.9 MB. Free memory was 92.9 MB in the beginning and 91.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 400.02 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 91.2 MB in the beginning and 167.1 MB in the end (delta: -75.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9020.62 ms. Allocated memory was 202.4 MB in the beginning and 245.4 MB in the end (delta: 43.0 MB). Free memory was 166.4 MB in the beginning and 137.3 MB in the end (delta: 29.2 MB). Peak memory consumption was 72.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((j < n && 2 * i <= k) && k <= n) && 2 * i <= j - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((i <= 0 && k <= n) && n <= k) || (((((n * -1 + 1) / -2 <= 0 && k < i + 1) && (n * -1 + 1) / -2 + 1 <= i) && n <= k) && n <= j)) || ((k <= n && n <= k) && n <= j) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((k <= n && n <= k) && 2 * i <= j) || ((((i <= 0 && k <= 2 * i + 1) && k <= j) && n <= k) && 2 * i <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.3s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 217 SDtfs, 120 SDslu, 558 SDs, 0 SdLazy, 426 SolverSat, 67 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 237 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 76 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 37 PreInvPairs, 56 NumberOfFragments, 160 HoareAnnotationTreeSize, 37 FomulaSimplifications, 3079 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 12 FomulaSimplificationsInter, 298 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 218 NumberOfCodeBlocks, 218 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 273 ConstructedInterpolants, 1 QuantifiedInterpolants, 16841 SizeOfPredicates, 25 NumberOfNonLiveVariables, 506 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 104/112 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...