/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/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:13:42,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:13:42,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:13:42,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:13:42,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:13:42,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:13:42,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:13:42,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:13:42,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:13:42,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:13:42,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:13:42,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:13:42,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:13:42,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:13:42,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:13:42,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:13:42,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:13:42,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:13:42,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:13:42,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:13:42,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:13:42,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:13:42,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:13:42,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:13:42,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:13:42,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:13:42,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:13:42,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:13:42,908 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 11:13:42,949 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:13:42,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:13:42,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:13:42,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:13:42,955 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:13:42,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:13:42,955 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:13:42,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:13:42,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:13:42,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:13:42,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:13:42,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:13:42,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:13:42,957 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:13:42,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:13:42,957 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:13:42,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:13:42,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:13:42,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:13:42,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:13:42,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:13:42,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:13:42,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:13:42,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:13:42,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:13:42,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:13:42,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:42,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:13:42,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:13:42,962 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 11:13:43,287 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:13:43,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:13:43,307 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:13:43,309 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:13:43,310 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:13:43,311 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-07-21 11:13:43,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b55328fb3/dd6dd71c6c7e4902b29d7e8041d9c33c/FLAGac68f17e1 [2020-07-21 11:13:43,929 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:13:43,930 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c [2020-07-21 11:13:43,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b55328fb3/dd6dd71c6c7e4902b29d7e8041d9c33c/FLAGac68f17e1 [2020-07-21 11:13:44,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b55328fb3/dd6dd71c6c7e4902b29d7e8041d9c33c [2020-07-21 11:13:44,296 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:13:44,300 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:13:44,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:13:44,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:13:44,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:13:44,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:44" (1/1) ... [2020-07-21 11:13:44,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5957ebad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:44, skipping insertion in model container [2020-07-21 11:13:44,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:44" (1/1) ... [2020-07-21 11:13:44,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:13:44,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:13:44,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:13:44,564 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:13:44,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:13:44,601 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:13:44,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:44 WrapperNode [2020-07-21 11:13:44,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:13:44,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:13:44,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:13:44,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:13:44,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:44" (1/1) ... [2020-07-21 11:13:44,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:44" (1/1) ... [2020-07-21 11:13:44,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:44" (1/1) ... [2020-07-21 11:13:44,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:44" (1/1) ... [2020-07-21 11:13:44,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:44" (1/1) ... [2020-07-21 11:13:44,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:44" (1/1) ... [2020-07-21 11:13:44,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:44" (1/1) ... [2020-07-21 11:13:44,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:13:44,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:13:44,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:13:44,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:13:44,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:44" (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 11:13:44,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:13:44,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:13:44,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:13:44,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:13:44,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:13:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:13:44,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:13:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:13:45,101 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:13:45,102 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:13:45,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:45 BoogieIcfgContainer [2020-07-21 11:13:45,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:13:45,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:13:45,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:13:45,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:13:45,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:13:44" (1/3) ... [2020-07-21 11:13:45,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e7f148f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:45, skipping insertion in model container [2020-07-21 11:13:45,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:44" (2/3) ... [2020-07-21 11:13:45,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e7f148f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:45, skipping insertion in model container [2020-07-21 11:13:45,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:45" (3/3) ... [2020-07-21 11:13:45,122 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-07-21 11:13:45,143 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:13:45,155 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:13:45,179 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:13:45,209 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:13:45,210 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:13:45,210 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:13:45,210 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:13:45,211 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:13:45,211 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:13:45,211 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:13:45,211 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:13:45,237 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 11:13:45,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:13:45,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:45,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:45,248 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:45,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:45,256 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-07-21 11:13:45,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:45,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801418767] [2020-07-21 11:13:45,268 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 11:13:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:45,411 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 11:13:45,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:45,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801418767] [2020-07-21 11:13:45,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:45,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:45,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530534079] [2020-07-21 11:13:45,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:45,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:45,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:45,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:45,437 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-21 11:13:45,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:45,505 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-07-21 11:13:45,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:45,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 11:13:45,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:45,521 INFO L225 Difference]: With dead ends: 63 [2020-07-21 11:13:45,521 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 11:13:45,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 11:13:45,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-07-21 11:13:45,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 11:13:45,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-07-21 11:13:45,577 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-07-21 11:13:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:45,578 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-07-21 11:13:45,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-07-21 11:13:45,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:13:45,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:45,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:45,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:45,795 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:45,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:45,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-07-21 11:13:45,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:45,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826945688] [2020-07-21 11:13:45,798 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 11:13:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:45,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:45,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:45,862 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 11:13:45,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:45,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826945688] [2020-07-21 11:13:45,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:45,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:45,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485763842] [2020-07-21 11:13:45,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:45,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:45,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:45,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:45,875 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-07-21 11:13:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:45,906 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-07-21 11:13:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:45,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 11:13:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:45,909 INFO L225 Difference]: With dead ends: 77 [2020-07-21 11:13:45,909 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 11:13:45,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 11:13:45,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-07-21 11:13:45,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 11:13:45,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-07-21 11:13:45,921 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-07-21 11:13:45,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:45,922 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-07-21 11:13:45,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:45,923 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-07-21 11:13:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 11:13:45,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:45,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:46,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:46,138 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:46,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:46,139 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-07-21 11:13:46,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:46,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593342484] [2020-07-21 11:13:46,140 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 11:13:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:46,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:46,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:46,206 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 11:13:46,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:46,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593342484] [2020-07-21 11:13:46,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:46,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:46,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300000748] [2020-07-21 11:13:46,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:46,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:46,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:46,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:46,210 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-07-21 11:13:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:46,232 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-07-21 11:13:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:46,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 11:13:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:46,234 INFO L225 Difference]: With dead ends: 72 [2020-07-21 11:13:46,234 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 11:13:46,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:46,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 11:13:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-07-21 11:13:46,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 11:13:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-07-21 11:13:46,244 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-07-21 11:13:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:46,245 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-07-21 11:13:46,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-07-21 11:13:46,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 11:13:46,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:46,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:46,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:46,461 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:46,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-07-21 11:13:46,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:46,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897454742] [2020-07-21 11:13:46,464 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 11:13:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:46,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:46,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:46,520 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 11:13:46,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:46,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897454742] [2020-07-21 11:13:46,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:46,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:46,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282611501] [2020-07-21 11:13:46,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:46,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:46,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:46,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:46,524 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-07-21 11:13:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:46,560 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-07-21 11:13:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:46,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 11:13:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:46,562 INFO L225 Difference]: With dead ends: 88 [2020-07-21 11:13:46,563 INFO L226 Difference]: Without dead ends: 86 [2020-07-21 11:13:46,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-21 11:13:46,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-07-21 11:13:46,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 11:13:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-07-21 11:13:46,575 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-07-21 11:13:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:46,576 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-07-21 11:13:46,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-07-21 11:13:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 11:13:46,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:46,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:46,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:46,795 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:46,796 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-07-21 11:13:46,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:46,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170182910] [2020-07-21 11:13:46,797 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) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:46,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:46,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:46,852 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 11:13:46,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:46,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170182910] [2020-07-21 11:13:46,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:46,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:46,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622839670] [2020-07-21 11:13:46,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:46,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:46,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:46,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:46,856 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-07-21 11:13:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:46,885 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-07-21 11:13:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:46,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 11:13:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:46,888 INFO L225 Difference]: With dead ends: 144 [2020-07-21 11:13:46,888 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 11:13:46,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 11:13:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-07-21 11:13:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-21 11:13:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-07-21 11:13:46,902 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-07-21 11:13:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:46,902 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-07-21 11:13:46,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:46,903 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-07-21 11:13:46,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 11:13:46,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:46,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:47,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:47,121 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:47,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-07-21 11:13:47,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:47,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830264060] [2020-07-21 11:13:47,124 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 11:13:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:47,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:47,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:47,190 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 11:13:47,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:47,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830264060] [2020-07-21 11:13:47,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:47,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:47,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099298348] [2020-07-21 11:13:47,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:47,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:47,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:47,193 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-07-21 11:13:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:47,222 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-07-21 11:13:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:47,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 11:13:47,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:47,227 INFO L225 Difference]: With dead ends: 129 [2020-07-21 11:13:47,227 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 11:13:47,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 11:13:47,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-07-21 11:13:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 11:13:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-07-21 11:13:47,239 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-07-21 11:13:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:47,239 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-07-21 11:13:47,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-07-21 11:13:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 11:13:47,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:47,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:47,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:47,443 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-07-21 11:13:47,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:47,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106453541] [2020-07-21 11:13:47,445 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 11:13:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:47,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:47,495 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 11:13:47,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:47,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106453541] [2020-07-21 11:13:47,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:47,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:47,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990520698] [2020-07-21 11:13:47,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:47,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:47,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:47,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:47,499 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-07-21 11:13:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:47,526 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-07-21 11:13:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:47,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 11:13:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:47,529 INFO L225 Difference]: With dead ends: 156 [2020-07-21 11:13:47,529 INFO L226 Difference]: Without dead ends: 154 [2020-07-21 11:13:47,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-07-21 11:13:47,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-07-21 11:13:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-21 11:13:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-07-21 11:13:47,543 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-07-21 11:13:47,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:47,544 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-07-21 11:13:47,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:47,544 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-07-21 11:13:47,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 11:13:47,546 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:47,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:47,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:47,756 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:47,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:47,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-07-21 11:13:47,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:47,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024784598] [2020-07-21 11:13:47,759 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 11:13:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:47,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:47,804 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 11:13:47,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:47,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024784598] [2020-07-21 11:13:47,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:47,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:47,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292496898] [2020-07-21 11:13:47,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:47,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:47,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:47,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:47,806 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-07-21 11:13:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:47,837 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-07-21 11:13:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:47,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 11:13:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:47,839 INFO L225 Difference]: With dead ends: 272 [2020-07-21 11:13:47,840 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 11:13:47,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 11:13:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-07-21 11:13:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-21 11:13:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-07-21 11:13:47,858 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-07-21 11:13:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:47,858 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-07-21 11:13:47,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-07-21 11:13:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:13:47,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:47,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:48,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:48,072 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:48,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:48,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-07-21 11:13:48,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:48,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045795084] [2020-07-21 11:13:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:48,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:48,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:48,128 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 11:13:48,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:48,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045795084] [2020-07-21 11:13:48,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:48,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:48,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554566887] [2020-07-21 11:13:48,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:48,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:48,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:48,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:48,133 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-07-21 11:13:48,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:48,162 INFO L93 Difference]: Finished difference Result 240 states and 360 transitions. [2020-07-21 11:13:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:48,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 11:13:48,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:48,164 INFO L225 Difference]: With dead ends: 240 [2020-07-21 11:13:48,165 INFO L226 Difference]: Without dead ends: 166 [2020-07-21 11:13:48,166 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 [2020-07-21 11:13:48,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-21 11:13:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-07-21 11:13:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-21 11:13:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-07-21 11:13:48,197 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 19 [2020-07-21 11:13:48,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:48,198 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-07-21 11:13:48,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:48,198 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-07-21 11:13:48,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:13:48,204 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:48,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:48,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:48,418 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:48,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1554860230, now seen corresponding path program 1 times [2020-07-21 11:13:48,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:48,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514074717] [2020-07-21 11:13:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:48,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:48,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:48,463 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 11:13:48,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:48,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514074717] [2020-07-21 11:13:48,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:48,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:48,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738964490] [2020-07-21 11:13:48,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:48,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:48,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:48,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:48,465 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 3 states. [2020-07-21 11:13:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:48,490 INFO L93 Difference]: Finished difference Result 284 states and 424 transitions. [2020-07-21 11:13:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:48,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 11:13:48,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:48,495 INFO L225 Difference]: With dead ends: 284 [2020-07-21 11:13:48,495 INFO L226 Difference]: Without dead ends: 282 [2020-07-21 11:13:48,496 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 [2020-07-21 11:13:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-07-21 11:13:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2020-07-21 11:13:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-21 11:13:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-07-21 11:13:48,519 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-07-21 11:13:48,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:48,519 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-07-21 11:13:48,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:48,519 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-07-21 11:13:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:13:48,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:48,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:48,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:48,732 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:48,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:48,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-07-21 11:13:48,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:48,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226901498] [2020-07-21 11:13:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:48,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:48,785 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 11:13:48,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:48,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226901498] [2020-07-21 11:13:48,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:48,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:48,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305536909] [2020-07-21 11:13:48,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:48,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:48,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:48,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:48,790 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-07-21 11:13:48,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:48,832 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-07-21 11:13:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:48,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 11:13:48,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:48,835 INFO L225 Difference]: With dead ends: 524 [2020-07-21 11:13:48,835 INFO L226 Difference]: Without dead ends: 306 [2020-07-21 11:13:48,839 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 [2020-07-21 11:13:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-07-21 11:13:48,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-07-21 11:13:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-07-21 11:13:48,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-07-21 11:13:48,865 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-07-21 11:13:48,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:48,865 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-07-21 11:13:48,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:48,866 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-07-21 11:13:48,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:13:48,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:48,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:49,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:49,081 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:49,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:49,082 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-07-21 11:13:49,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:49,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970910538] [2020-07-21 11:13:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:49,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:49,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:49,121 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 11:13:49,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:49,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970910538] [2020-07-21 11:13:49,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:49,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:49,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97888627] [2020-07-21 11:13:49,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:49,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:49,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:49,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:49,125 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-07-21 11:13:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:49,146 INFO L93 Difference]: Finished difference Result 456 states and 628 transitions. [2020-07-21 11:13:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:49,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 11:13:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:49,149 INFO L225 Difference]: With dead ends: 456 [2020-07-21 11:13:49,149 INFO L226 Difference]: Without dead ends: 314 [2020-07-21 11:13:49,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-07-21 11:13:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-07-21 11:13:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-07-21 11:13:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2020-07-21 11:13:49,167 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 20 [2020-07-21 11:13:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:49,168 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2020-07-21 11:13:49,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2020-07-21 11:13:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:13:49,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:49,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:49,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:49,380 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:49,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:49,381 INFO L82 PathProgramCache]: Analyzing trace with hash 563215563, now seen corresponding path program 1 times [2020-07-21 11:13:49,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:49,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310979258] [2020-07-21 11:13:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:49,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:49,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:49,422 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 11:13:49,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:49,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310979258] [2020-07-21 11:13:49,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:49,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:49,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084214533] [2020-07-21 11:13:49,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:49,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:49,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:49,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:49,426 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand 3 states. [2020-07-21 11:13:49,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:49,458 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2020-07-21 11:13:49,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:49,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 11:13:49,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:49,462 INFO L225 Difference]: With dead ends: 524 [2020-07-21 11:13:49,462 INFO L226 Difference]: Without dead ends: 522 [2020-07-21 11:13:49,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:49,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-07-21 11:13:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 456. [2020-07-21 11:13:49,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-07-21 11:13:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-07-21 11:13:49,482 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-07-21 11:13:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:49,483 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-07-21 11:13:49,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-07-21 11:13:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:13:49,485 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:49,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:49,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:49,701 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:49,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:49,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-07-21 11:13:49,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:49,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574115190] [2020-07-21 11:13:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:49,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:49,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:49,742 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 11:13:49,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:49,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574115190] [2020-07-21 11:13:49,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:49,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:49,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393266964] [2020-07-21 11:13:49,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:49,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:49,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:49,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:49,745 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-07-21 11:13:49,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:49,777 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-07-21 11:13:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:49,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 11:13:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:49,781 INFO L225 Difference]: With dead ends: 1020 [2020-07-21 11:13:49,781 INFO L226 Difference]: Without dead ends: 586 [2020-07-21 11:13:49,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:49,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-07-21 11:13:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-07-21 11:13:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-07-21 11:13:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-07-21 11:13:49,821 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-07-21 11:13:49,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:49,822 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-07-21 11:13:49,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-07-21 11:13:49,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:49,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:49,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:50,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:50,039 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:50,040 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-07-21 11:13:50,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:50,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264694794] [2020-07-21 11:13:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:50,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:50,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:50,084 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 11:13:50,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:50,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264694794] [2020-07-21 11:13:50,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:50,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:50,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102530915] [2020-07-21 11:13:50,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:50,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:50,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:50,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:50,092 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-07-21 11:13:50,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:50,124 INFO L93 Difference]: Finished difference Result 876 states and 1080 transitions. [2020-07-21 11:13:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:50,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:50,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:50,129 INFO L225 Difference]: With dead ends: 876 [2020-07-21 11:13:50,129 INFO L226 Difference]: Without dead ends: 602 [2020-07-21 11:13:50,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-07-21 11:13:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 600. [2020-07-21 11:13:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-07-21 11:13:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 726 transitions. [2020-07-21 11:13:50,154 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 726 transitions. Word has length 21 [2020-07-21 11:13:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:50,154 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 726 transitions. [2020-07-21 11:13:50,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 726 transitions. [2020-07-21 11:13:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:50,157 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:50,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:50,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:50,372 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:50,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:50,373 INFO L82 PathProgramCache]: Analyzing trace with hash -112997701, now seen corresponding path program 1 times [2020-07-21 11:13:50,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:50,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855623325] [2020-07-21 11:13:50,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:50,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:50,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:50,417 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 11:13:50,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:50,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855623325] [2020-07-21 11:13:50,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:50,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:50,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770091141] [2020-07-21 11:13:50,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:50,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:50,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:50,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:50,420 INFO L87 Difference]: Start difference. First operand 600 states and 726 transitions. Second operand 3 states. [2020-07-21 11:13:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:50,457 INFO L93 Difference]: Finished difference Result 970 states and 1159 transitions. [2020-07-21 11:13:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:50,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:50,463 INFO L225 Difference]: With dead ends: 970 [2020-07-21 11:13:50,463 INFO L226 Difference]: Without dead ends: 968 [2020-07-21 11:13:50,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:50,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-07-21 11:13:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 904. [2020-07-21 11:13:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-07-21 11:13:50,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2020-07-21 11:13:50,498 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 21 [2020-07-21 11:13:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:50,499 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2020-07-21 11:13:50,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2020-07-21 11:13:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:50,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:50,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:50,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:50,716 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:50,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:50,717 INFO L82 PathProgramCache]: Analyzing trace with hash 567060669, now seen corresponding path program 1 times [2020-07-21 11:13:50,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:50,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640801091] [2020-07-21 11:13:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:50,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:50,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:50,755 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 11:13:50,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:50,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640801091] [2020-07-21 11:13:50,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:50,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:50,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777066778] [2020-07-21 11:13:50,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:50,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:50,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:50,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:50,758 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand 3 states. [2020-07-21 11:13:50,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:50,812 INFO L93 Difference]: Finished difference Result 1992 states and 2278 transitions. [2020-07-21 11:13:50,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:50,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:50,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:50,813 INFO L225 Difference]: With dead ends: 1992 [2020-07-21 11:13:50,813 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:13:50,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:50,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:13:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:13:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:13:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:13:50,818 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-07-21 11:13:50,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:50,819 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:13:50,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:13:50,819 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:13:51,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:51,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:13:51,122 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 11:13:51,123 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:13:51,123 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:13:51,123 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 11:13:51,123 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:13:51,123 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:13:51,124 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-07-21 11:13:51,124 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-07-21 11:13:51,124 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 11:13:51,124 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-07-21 11:13:51,125 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-07-21 11:13:51,125 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-07-21 11:13:51,125 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 11:13:51,125 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 11:13:51,125 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 11:13:51,126 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-07-21 11:13:51,126 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-07-21 11:13:51,126 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-07-21 11:13:51,126 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-07-21 11:13:51,126 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-07-21 11:13:51,126 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-07-21 11:13:51,127 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 11:13:51,127 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-07-21 11:13:51,127 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-07-21 11:13:51,127 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-07-21 11:13:51,127 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-07-21 11:13:51,127 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 11:13:51,128 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 11:13:51,128 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 11:13:51,128 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-07-21 11:13:51,128 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 11:13:51,128 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 11:13:51,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:13:51 BoogieIcfgContainer [2020-07-21 11:13:51,145 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:13:51,149 INFO L168 Benchmark]: Toolchain (without parser) took 6849.31 ms. Allocated memory was 146.3 MB in the beginning and 244.8 MB in the end (delta: 98.6 MB). Free memory was 102.7 MB in the beginning and 147.9 MB in the end (delta: -45.2 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:51,150 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 146.3 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 11:13:51,150 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.32 ms. Allocated memory is still 146.3 MB. Free memory was 102.5 MB in the beginning and 92.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:51,151 INFO L168 Benchmark]: Boogie Preprocessor took 119.58 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 182.7 MB in the end (delta: -90.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:51,152 INFO L168 Benchmark]: RCFGBuilder took 387.98 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 166.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:51,153 INFO L168 Benchmark]: TraceAbstraction took 6032.88 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 165.4 MB in the beginning and 147.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 58.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:51,156 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 146.3 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.32 ms. Allocated memory is still 146.3 MB. Free memory was 102.5 MB in the beginning and 92.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.58 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 182.7 MB in the end (delta: -90.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 387.98 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 166.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6032.88 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 165.4 MB in the beginning and 147.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 58.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 105]: 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: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.8s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 923 SDtfs, 417 SDslu, 612 SDs, 0 SdLazy, 91 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 300 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 270 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 9690 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1268 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 0/0 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...