/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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:22:02,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:22:02,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:22:02,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:22:02,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:22:02,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:22:02,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:22:02,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:22:02,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:22:02,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:22:02,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:22:02,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:22:02,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:22:02,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:22:02,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:22:02,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:22:02,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:22:02,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:22:02,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:22:02,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:22:02,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:22:02,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:22:02,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:22:02,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:22:02,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:22:02,533 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:22:02,549 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:22:02,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:22:02,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:22:02,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:22:02,552 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:22:02,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:22:02,552 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:22:02,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:22:02,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:22:02,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:22:02,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:22:02,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:22:02,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:22:02,553 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:22:02,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:22:02,554 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:22:02,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:22:02,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:22:02,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:22:02,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:22:02,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:22:02,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:22:02,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:22:02,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:22:02,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:22:02,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:22:02,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:02,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:22:02,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:22:02,557 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 [2020-07-20 11:22:02,879 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:22:02,903 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:22:02,907 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:22:02,909 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:22:02,910 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:22:02,910 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-07-20 11:22:03,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd44a576/082b67fcc024450b9871d2d145b21c21/FLAG94000b7af [2020-07-20 11:22:03,566 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:22:03,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2020-07-20 11:22:03,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd44a576/082b67fcc024450b9871d2d145b21c21/FLAG94000b7af [2020-07-20 11:22:03,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd44a576/082b67fcc024450b9871d2d145b21c21 [2020-07-20 11:22:03,874 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:22:03,877 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:22:03,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:22:03,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:22:03,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:22:03,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:22:03" (1/1) ... [2020-07-20 11:22:03,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201a42f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:03, skipping insertion in model container [2020-07-20 11:22:03,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:22:03" (1/1) ... [2020-07-20 11:22:03,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:22:03,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:22:04,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:22:04,143 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:22:04,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:22:04,196 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:22:04,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:04 WrapperNode [2020-07-20 11:22:04,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:22:04,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:22:04,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:22:04,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:22:04,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:04" (1/1) ... [2020-07-20 11:22:04,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:04" (1/1) ... [2020-07-20 11:22:04,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:04" (1/1) ... [2020-07-20 11:22:04,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:04" (1/1) ... [2020-07-20 11:22:04,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:04" (1/1) ... [2020-07-20 11:22:04,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:04" (1/1) ... [2020-07-20 11:22:04,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:04" (1/1) ... [2020-07-20 11:22:04,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:22:04,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:22:04,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:22:04,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:22:04,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:22:04,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:22:04,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:22:04,440 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:22:04,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:22:04,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:22:04,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:22:04,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:22:04,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:22:04,783 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:22:04,783 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:22:04,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:22:04 BoogieIcfgContainer [2020-07-20 11:22:04,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:22:04,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:22:04,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:22:04,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:22:04,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:22:03" (1/3) ... [2020-07-20 11:22:04,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8ac34b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:22:04, skipping insertion in model container [2020-07-20 11:22:04,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:04" (2/3) ... [2020-07-20 11:22:04,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8ac34b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:22:04, skipping insertion in model container [2020-07-20 11:22:04,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:22:04" (3/3) ... [2020-07-20 11:22:04,802 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-07-20 11:22:04,818 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:22:04,829 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:22:04,863 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:22:04,904 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:22:04,905 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:22:04,905 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:22:04,906 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:22:04,907 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:22:04,907 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:22:04,907 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:22:04,907 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:22:04,933 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-07-20 11:22:04,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:22:04,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:04,943 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] [2020-07-20 11:22:04,944 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:04,954 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-07-20 11:22:04,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:04,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94775704] [2020-07-20 11:22:04,969 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 [2020-07-20 11:22:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:05,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:05,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:05,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:05,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94775704] [2020-07-20 11:22:05,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:05,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:05,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90050017] [2020-07-20 11:22:05,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:05,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:05,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:05,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:05,161 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-07-20 11:22:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:05,230 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-07-20 11:22:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:05,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 11:22:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:05,250 INFO L225 Difference]: With dead ends: 87 [2020-07-20 11:22:05,250 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 11:22:05,255 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 [2020-07-20 11:22:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 11:22:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-20 11:22:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 11:22:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-07-20 11:22:05,314 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-07-20 11:22:05,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:05,315 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-07-20 11:22:05,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:05,316 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-07-20 11:22:05,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:22:05,317 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:05,317 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] [2020-07-20 11:22:05,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:05,534 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:05,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:05,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-07-20 11:22:05,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:05,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230942860] [2020-07-20 11:22:05,537 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 [2020-07-20 11:22:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:05,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:05,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:05,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:05,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230942860] [2020-07-20 11:22:05,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:05,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:05,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408309504] [2020-07-20 11:22:05,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:05,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:05,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:05,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:05,662 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-07-20 11:22:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:05,697 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-07-20 11:22:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:05,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 11:22:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:05,701 INFO L225 Difference]: With dead ends: 117 [2020-07-20 11:22:05,701 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 11:22:05,703 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 [2020-07-20 11:22:05,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 11:22:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-07-20 11:22:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 11:22:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-07-20 11:22:05,716 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-07-20 11:22:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:05,717 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-07-20 11:22:05,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-07-20 11:22:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:22:05,721 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:05,721 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] [2020-07-20 11:22:05,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:05,936 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:05,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-07-20 11:22:05,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:05,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203821057] [2020-07-20 11:22:05,939 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 [2020-07-20 11:22:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:05,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:05,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:06,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:06,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203821057] [2020-07-20 11:22:06,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:06,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:06,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820829344] [2020-07-20 11:22:06,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:06,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:06,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:06,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:06,016 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-07-20 11:22:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:06,041 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-07-20 11:22:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:06,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 11:22:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:06,043 INFO L225 Difference]: With dead ends: 108 [2020-07-20 11:22:06,044 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 11:22:06,045 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 [2020-07-20 11:22:06,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 11:22:06,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-07-20 11:22:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-20 11:22:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-07-20 11:22:06,057 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-07-20 11:22:06,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:06,058 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-07-20 11:22:06,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-07-20 11:22:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:22:06,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:06,060 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] [2020-07-20 11:22:06,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:06,277 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:06,278 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-07-20 11:22:06,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:06,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842891930] [2020-07-20 11:22:06,279 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 [2020-07-20 11:22:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:06,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:06,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:06,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:06,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842891930] [2020-07-20 11:22:06,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:06,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:06,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720803406] [2020-07-20 11:22:06,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:06,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:06,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:06,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:06,365 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-07-20 11:22:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:06,419 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-07-20 11:22:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:06,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 11:22:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:06,423 INFO L225 Difference]: With dead ends: 136 [2020-07-20 11:22:06,426 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 11:22:06,428 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 [2020-07-20 11:22:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 11:22:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-07-20 11:22:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-20 11:22:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-07-20 11:22:06,461 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-07-20 11:22:06,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:06,462 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-07-20 11:22:06,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:06,463 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-07-20 11:22:06,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:22:06,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:06,464 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] [2020-07-20 11:22:06,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:06,666 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:06,667 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-07-20 11:22:06,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:06,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129947938] [2020-07-20 11:22:06,669 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 [2020-07-20 11:22:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:06,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:06,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:06,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129947938] [2020-07-20 11:22:06,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:06,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:06,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246026384] [2020-07-20 11:22:06,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:06,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:06,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:06,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:06,754 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-07-20 11:22:06,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:06,782 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-07-20 11:22:06,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:06,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 11:22:06,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:06,785 INFO L225 Difference]: With dead ends: 224 [2020-07-20 11:22:06,785 INFO L226 Difference]: Without dead ends: 136 [2020-07-20 11:22:06,787 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 [2020-07-20 11:22:06,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-20 11:22:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-07-20 11:22:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 11:22:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-07-20 11:22:06,800 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-07-20 11:22:06,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:06,800 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-07-20 11:22:06,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:06,801 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-07-20 11:22:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:22:06,802 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:06,802 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, 1] [2020-07-20 11:22:07,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:07,019 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:07,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-07-20 11:22:07,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:07,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966776403] [2020-07-20 11:22:07,021 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 [2020-07-20 11:22:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:07,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:07,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:07,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:07,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966776403] [2020-07-20 11:22:07,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:07,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:07,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625836687] [2020-07-20 11:22:07,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:07,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:07,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:07,090 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-07-20 11:22:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:07,110 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-07-20 11:22:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:07,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 11:22:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:07,112 INFO L225 Difference]: With dead ends: 201 [2020-07-20 11:22:07,112 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 11:22:07,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 11:22:07,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-07-20 11:22:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 11:22:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-07-20 11:22:07,127 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-07-20 11:22:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:07,127 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-07-20 11:22:07,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-07-20 11:22:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:22:07,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:07,132 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, 1] [2020-07-20 11:22:07,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:07,347 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:07,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:07,348 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-07-20 11:22:07,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:07,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277302158] [2020-07-20 11:22:07,349 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 [2020-07-20 11:22:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:07,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:07,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:07,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277302158] [2020-07-20 11:22:07,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:07,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:07,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122861534] [2020-07-20 11:22:07,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:07,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:07,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:07,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:07,407 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-07-20 11:22:07,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:07,428 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-07-20 11:22:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:07,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 11:22:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:07,432 INFO L225 Difference]: With dead ends: 252 [2020-07-20 11:22:07,432 INFO L226 Difference]: Without dead ends: 250 [2020-07-20 11:22:07,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-20 11:22:07,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-07-20 11:22:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-20 11:22:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-07-20 11:22:07,447 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-07-20 11:22:07,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:07,448 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-07-20 11:22:07,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-07-20 11:22:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:22:07,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:07,451 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, 1] [2020-07-20 11:22:07,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:07,666 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:07,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:07,667 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-07-20 11:22:07,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:07,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61390232] [2020-07-20 11:22:07,668 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 [2020-07-20 11:22:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:07,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:07,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:07,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:07,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61390232] [2020-07-20 11:22:07,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:07,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:07,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960825439] [2020-07-20 11:22:07,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:07,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:07,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:07,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:07,742 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-07-20 11:22:07,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:07,767 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-07-20 11:22:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:07,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 11:22:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:07,771 INFO L225 Difference]: With dead ends: 432 [2020-07-20 11:22:07,771 INFO L226 Difference]: Without dead ends: 258 [2020-07-20 11:22:07,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-07-20 11:22:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-07-20 11:22:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-20 11:22:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-07-20 11:22:07,789 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-07-20 11:22:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:07,789 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-07-20 11:22:07,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-07-20 11:22:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:22:07,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:07,791 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, 1, 1] [2020-07-20 11:22:08,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:08,007 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:08,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-07-20 11:22:08,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:08,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323155324] [2020-07-20 11:22:08,009 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 [2020-07-20 11:22:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:08,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:08,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:08,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:08,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323155324] [2020-07-20 11:22:08,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:08,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:08,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871098160] [2020-07-20 11:22:08,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:08,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:08,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:08,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:08,066 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-07-20 11:22:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:08,096 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-07-20 11:22:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:08,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 11:22:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:08,099 INFO L225 Difference]: With dead ends: 384 [2020-07-20 11:22:08,100 INFO L226 Difference]: Without dead ends: 262 [2020-07-20 11:22:08,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:08,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-07-20 11:22:08,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-07-20 11:22:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-20 11:22:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-07-20 11:22:08,114 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-07-20 11:22:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:08,114 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-07-20 11:22:08,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-07-20 11:22:08,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:22:08,116 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:08,116 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, 1, 1] [2020-07-20 11:22:08,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:08,331 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:08,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-07-20 11:22:08,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:08,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192992282] [2020-07-20 11:22:08,333 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 [2020-07-20 11:22:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:08,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:08,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:08,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:08,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192992282] [2020-07-20 11:22:08,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:08,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:08,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419792114] [2020-07-20 11:22:08,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:08,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:08,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:08,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:08,420 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-07-20 11:22:08,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:08,464 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-07-20 11:22:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:08,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 11:22:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:08,469 INFO L225 Difference]: With dead ends: 476 [2020-07-20 11:22:08,469 INFO L226 Difference]: Without dead ends: 474 [2020-07-20 11:22:08,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-07-20 11:22:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-07-20 11:22:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-07-20 11:22:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-07-20 11:22:08,487 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-07-20 11:22:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:08,487 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-07-20 11:22:08,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-07-20 11:22:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:22:08,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:08,489 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, 1, 1] [2020-07-20 11:22:08,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:08,693 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:08,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:08,694 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-07-20 11:22:08,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:08,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603689688] [2020-07-20 11:22:08,695 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 [2020-07-20 11:22:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:08,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:08,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:08,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603689688] [2020-07-20 11:22:08,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:08,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:08,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322361123] [2020-07-20 11:22:08,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:08,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:08,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:08,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:08,751 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-07-20 11:22:08,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:08,795 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-07-20 11:22:08,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:08,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 11:22:08,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:08,801 INFO L225 Difference]: With dead ends: 844 [2020-07-20 11:22:08,801 INFO L226 Difference]: Without dead ends: 498 [2020-07-20 11:22:08,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-07-20 11:22:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-07-20 11:22:08,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-07-20 11:22:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-07-20 11:22:08,837 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-07-20 11:22:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:08,838 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-07-20 11:22:08,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-07-20 11:22:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 11:22:08,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:08,840 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, 1, 1, 1] [2020-07-20 11:22:09,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:09,057 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:09,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:09,058 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-07-20 11:22:09,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:09,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652846629] [2020-07-20 11:22:09,059 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 [2020-07-20 11:22:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:09,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:09,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:09,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:09,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652846629] [2020-07-20 11:22:09,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:09,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:09,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270480731] [2020-07-20 11:22:09,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:09,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:09,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:09,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:09,126 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-07-20 11:22:09,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:09,153 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-07-20 11:22:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:09,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 11:22:09,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:09,158 INFO L225 Difference]: With dead ends: 744 [2020-07-20 11:22:09,158 INFO L226 Difference]: Without dead ends: 506 [2020-07-20 11:22:09,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-07-20 11:22:09,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-07-20 11:22:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-07-20 11:22:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-07-20 11:22:09,184 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-07-20 11:22:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:09,185 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-07-20 11:22:09,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:09,185 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-07-20 11:22:09,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 11:22:09,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:09,187 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, 1, 1, 1] [2020-07-20 11:22:09,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:09,402 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:09,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:09,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-07-20 11:22:09,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:09,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580937868] [2020-07-20 11:22:09,416 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 [2020-07-20 11:22:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:09,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:09,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:09,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:09,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580937868] [2020-07-20 11:22:09,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:09,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:09,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185461987] [2020-07-20 11:22:09,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:09,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:09,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:09,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:09,478 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-07-20 11:22:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:09,508 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-07-20 11:22:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:09,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 11:22:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:09,514 INFO L225 Difference]: With dead ends: 908 [2020-07-20 11:22:09,515 INFO L226 Difference]: Without dead ends: 906 [2020-07-20 11:22:09,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-07-20 11:22:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-07-20 11:22:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-07-20 11:22:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-07-20 11:22:09,547 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-07-20 11:22:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:09,548 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-07-20 11:22:09,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-07-20 11:22:09,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 11:22:09,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:09,551 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, 1, 1, 1] [2020-07-20 11:22:09,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:09,764 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:09,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:09,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-07-20 11:22:09,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:09,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452662667] [2020-07-20 11:22:09,766 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 [2020-07-20 11:22:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:09,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:09,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:09,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:09,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452662667] [2020-07-20 11:22:09,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:09,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:09,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394304342] [2020-07-20 11:22:09,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:09,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:09,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:09,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:09,820 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-07-20 11:22:09,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:09,862 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-07-20 11:22:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:09,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 11:22:09,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:09,868 INFO L225 Difference]: With dead ends: 1660 [2020-07-20 11:22:09,869 INFO L226 Difference]: Without dead ends: 970 [2020-07-20 11:22:09,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-07-20 11:22:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-07-20 11:22:09,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-07-20 11:22:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-07-20 11:22:09,916 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-07-20 11:22:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:09,917 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-07-20 11:22:09,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-07-20 11:22:09,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:22:09,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:09,920 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, 1, 1, 1, 1] [2020-07-20 11:22:10,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:10,134 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:10,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:10,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-07-20 11:22:10,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:10,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760052284] [2020-07-20 11:22:10,136 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 [2020-07-20 11:22:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:10,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:10,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:10,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:10,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760052284] [2020-07-20 11:22:10,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:10,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:10,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378584533] [2020-07-20 11:22:10,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:10,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:10,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:10,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:10,196 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-07-20 11:22:10,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:10,229 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-07-20 11:22:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:10,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 11:22:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:10,235 INFO L225 Difference]: With dead ends: 1452 [2020-07-20 11:22:10,236 INFO L226 Difference]: Without dead ends: 986 [2020-07-20 11:22:10,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:10,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-07-20 11:22:10,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-07-20 11:22:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-07-20 11:22:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-07-20 11:22:10,275 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-07-20 11:22:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:10,275 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-07-20 11:22:10,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-07-20 11:22:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:22:10,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:10,278 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, 1, 1, 1, 1] [2020-07-20 11:22:10,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:10,492 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:10,493 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-07-20 11:22:10,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:10,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298191076] [2020-07-20 11:22:10,493 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 [2020-07-20 11:22:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:10,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:10,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:10,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:10,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298191076] [2020-07-20 11:22:10,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:10,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:10,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359310602] [2020-07-20 11:22:10,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:10,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:10,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:10,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:10,566 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-07-20 11:22:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:10,604 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-07-20 11:22:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:10,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 11:22:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:10,616 INFO L225 Difference]: With dead ends: 1740 [2020-07-20 11:22:10,617 INFO L226 Difference]: Without dead ends: 1738 [2020-07-20 11:22:10,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:10,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-07-20 11:22:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-07-20 11:22:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-07-20 11:22:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-07-20 11:22:10,677 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-07-20 11:22:10,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:10,678 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-07-20 11:22:10,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:10,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-07-20 11:22:10,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:22:10,682 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:10,682 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, 1, 1, 1, 1] [2020-07-20 11:22:10,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:10,897 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:10,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-07-20 11:22:10,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:10,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106721342] [2020-07-20 11:22:10,898 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 [2020-07-20 11:22:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:10,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:10,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:10,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:10,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106721342] [2020-07-20 11:22:10,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:10,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:10,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405703439] [2020-07-20 11:22:10,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:10,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:10,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:10,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:10,953 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-07-20 11:22:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:11,005 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-07-20 11:22:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:11,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 11:22:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:11,016 INFO L225 Difference]: With dead ends: 3276 [2020-07-20 11:22:11,016 INFO L226 Difference]: Without dead ends: 1898 [2020-07-20 11:22:11,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:11,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-07-20 11:22:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-07-20 11:22:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-07-20 11:22:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-07-20 11:22:11,113 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-07-20 11:22:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:11,114 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-07-20 11:22:11,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:11,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-07-20 11:22:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:22:11,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:11,118 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, 1, 1, 1, 1, 1] [2020-07-20 11:22:11,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:11,332 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:11,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-07-20 11:22:11,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:11,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614399341] [2020-07-20 11:22:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:11,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:11,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:11,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:11,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614399341] [2020-07-20 11:22:11,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:11,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:11,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763924638] [2020-07-20 11:22:11,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:11,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:11,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:11,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:11,387 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-07-20 11:22:11,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:11,438 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-07-20 11:22:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:11,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-20 11:22:11,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:11,450 INFO L225 Difference]: With dead ends: 2844 [2020-07-20 11:22:11,451 INFO L226 Difference]: Without dead ends: 1930 [2020-07-20 11:22:11,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:11,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-07-20 11:22:11,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-07-20 11:22:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-07-20 11:22:11,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-07-20 11:22:11,520 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-07-20 11:22:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:11,521 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-07-20 11:22:11,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-07-20 11:22:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:22:11,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:11,524 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, 1, 1, 1, 1, 1] [2020-07-20 11:22:11,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:11,738 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:11,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:11,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-07-20 11:22:11,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:11,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949583790] [2020-07-20 11:22:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:11,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:11,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:11,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:11,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949583790] [2020-07-20 11:22:11,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:11,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:11,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696986073] [2020-07-20 11:22:11,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:11,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:11,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:11,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:11,795 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-07-20 11:22:11,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:11,850 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-07-20 11:22:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:11,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-20 11:22:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:11,870 INFO L225 Difference]: With dead ends: 3340 [2020-07-20 11:22:11,871 INFO L226 Difference]: Without dead ends: 3338 [2020-07-20 11:22:11,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-07-20 11:22:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-07-20 11:22:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-07-20 11:22:11,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-07-20 11:22:11,982 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-07-20 11:22:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:11,982 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-07-20 11:22:11,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:11,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-07-20 11:22:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:22:11,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:11,992 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, 1, 1, 1, 1, 1] [2020-07-20 11:22:12,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:12,207 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-07-20 11:22:12,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:12,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885862160] [2020-07-20 11:22:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:12,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:12,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:12,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:12,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885862160] [2020-07-20 11:22:12,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:12,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:12,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807603052] [2020-07-20 11:22:12,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:12,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:12,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:12,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:12,257 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-07-20 11:22:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:12,374 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-07-20 11:22:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:12,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-20 11:22:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:12,397 INFO L225 Difference]: With dead ends: 6476 [2020-07-20 11:22:12,398 INFO L226 Difference]: Without dead ends: 3722 [2020-07-20 11:22:12,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:12,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-07-20 11:22:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-07-20 11:22:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-07-20 11:22:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-07-20 11:22:12,526 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-07-20 11:22:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:12,527 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-07-20 11:22:12,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-07-20 11:22:12,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:22:12,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:12,533 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, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:12,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:12,748 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:12,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-07-20 11:22:12,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:12,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794341369] [2020-07-20 11:22:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:12,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:12,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:12,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:12,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794341369] [2020-07-20 11:22:12,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:12,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:12,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910387571] [2020-07-20 11:22:12,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:12,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:12,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:12,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:12,799 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-07-20 11:22:12,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:12,862 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-07-20 11:22:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:12,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 11:22:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:12,887 INFO L225 Difference]: With dead ends: 5580 [2020-07-20 11:22:12,888 INFO L226 Difference]: Without dead ends: 3786 [2020-07-20 11:22:12,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:12,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-07-20 11:22:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-07-20 11:22:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-07-20 11:22:13,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-07-20 11:22:13,021 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-07-20 11:22:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:13,022 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-07-20 11:22:13,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:13,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-07-20 11:22:13,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:22:13,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:13,029 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, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:13,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:13,244 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:13,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:13,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-07-20 11:22:13,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:13,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704536074] [2020-07-20 11:22:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:13,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:13,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:13,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:13,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704536074] [2020-07-20 11:22:13,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:13,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:13,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457268725] [2020-07-20 11:22:13,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:13,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:13,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:13,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:13,295 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-07-20 11:22:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:13,408 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-07-20 11:22:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:13,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 11:22:13,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:13,470 INFO L225 Difference]: With dead ends: 10956 [2020-07-20 11:22:13,470 INFO L226 Difference]: Without dead ends: 7306 [2020-07-20 11:22:13,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-07-20 11:22:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-07-20 11:22:13,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-07-20 11:22:13,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-07-20 11:22:13,751 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-07-20 11:22:13,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:13,751 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-07-20 11:22:13,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-07-20 11:22:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:22:13,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:13,763 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, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:13,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:13,977 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:13,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-07-20 11:22:13,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:13,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620113932] [2020-07-20 11:22:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:14,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:14,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:14,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:14,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620113932] [2020-07-20 11:22:14,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:14,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:14,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182779131] [2020-07-20 11:22:14,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:14,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:14,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:14,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:14,026 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-07-20 11:22:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:14,125 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-07-20 11:22:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:14,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 11:22:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:14,149 INFO L225 Difference]: With dead ends: 8076 [2020-07-20 11:22:14,150 INFO L226 Difference]: Without dead ends: 8074 [2020-07-20 11:22:14,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-07-20 11:22:14,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-07-20 11:22:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-07-20 11:22:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-07-20 11:22:14,342 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-07-20 11:22:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:14,343 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-07-20 11:22:14,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:14,343 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-07-20 11:22:14,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 11:22:14,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:14,465 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, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:14,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:14,680 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:14,681 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-07-20 11:22:14,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:14,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065548574] [2020-07-20 11:22:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:14,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:14,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:14,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:14,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065548574] [2020-07-20 11:22:14,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:14,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:14,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657455642] [2020-07-20 11:22:14,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:14,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:14,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:14,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:14,725 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-07-20 11:22:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:14,849 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-07-20 11:22:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:14,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-20 11:22:14,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:14,881 INFO L225 Difference]: With dead ends: 12172 [2020-07-20 11:22:14,881 INFO L226 Difference]: Without dead ends: 12170 [2020-07-20 11:22:14,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-07-20 11:22:15,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-07-20 11:22:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-07-20 11:22:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-07-20 11:22:15,128 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-07-20 11:22:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:15,128 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-07-20 11:22:15,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-07-20 11:22:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 11:22:15,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:15,149 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, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:15,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:15,363 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:15,364 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-07-20 11:22:15,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:15,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152540037] [2020-07-20 11:22:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:15,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:15,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:15,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:15,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152540037] [2020-07-20 11:22:15,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:15,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:15,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658946834] [2020-07-20 11:22:15,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:15,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:15,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:15,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:15,415 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-07-20 11:22:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:15,709 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-07-20 11:22:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:15,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-20 11:22:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:15,750 INFO L225 Difference]: With dead ends: 25228 [2020-07-20 11:22:15,750 INFO L226 Difference]: Without dead ends: 14218 [2020-07-20 11:22:15,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:15,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-07-20 11:22:16,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-07-20 11:22:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-07-20 11:22:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-07-20 11:22:16,102 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-07-20 11:22:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:16,103 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-07-20 11:22:16,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-07-20 11:22:16,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 11:22:16,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:16,125 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:16,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:16,340 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:16,341 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-07-20 11:22:16,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:16,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203721501] [2020-07-20 11:22:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:16,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:16,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:16,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:16,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203721501] [2020-07-20 11:22:16,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:16,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:16,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326949157] [2020-07-20 11:22:16,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:16,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:16,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:16,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:16,395 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-07-20 11:22:16,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:16,678 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-07-20 11:22:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:16,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-20 11:22:16,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:16,716 INFO L225 Difference]: With dead ends: 21516 [2020-07-20 11:22:16,716 INFO L226 Difference]: Without dead ends: 14602 [2020-07-20 11:22:16,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-07-20 11:22:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-07-20 11:22:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-07-20 11:22:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-07-20 11:22:17,064 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-07-20 11:22:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:17,065 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-07-20 11:22:17,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-07-20 11:22:17,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 11:22:17,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:17,092 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:17,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:17,306 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:17,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:17,306 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-07-20 11:22:17,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:17,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669629888] [2020-07-20 11:22:17,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:17,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:17,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:17,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:17,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669629888] [2020-07-20 11:22:17,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:17,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:17,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903662292] [2020-07-20 11:22:17,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:17,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:17,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:17,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:17,350 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-07-20 11:22:17,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:17,736 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-07-20 11:22:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:17,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-20 11:22:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:17,781 INFO L225 Difference]: With dead ends: 23562 [2020-07-20 11:22:17,781 INFO L226 Difference]: Without dead ends: 23560 [2020-07-20 11:22:17,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:17,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-07-20 11:22:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-07-20 11:22:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-07-20 11:22:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-07-20 11:22:18,180 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-07-20 11:22:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:18,181 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-07-20 11:22:18,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-07-20 11:22:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 11:22:18,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:18,210 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:18,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:18,411 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:18,412 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-07-20 11:22:18,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:18,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432336678] [2020-07-20 11:22:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:18,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:18,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:22:18,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:18,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432336678] [2020-07-20 11:22:18,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:18,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:18,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90298770] [2020-07-20 11:22:18,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:18,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:18,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:18,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:18,458 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-07-20 11:22:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:18,912 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-07-20 11:22:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:18,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-20 11:22:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:18,913 INFO L225 Difference]: With dead ends: 50184 [2020-07-20 11:22:18,913 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:22:18,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:22:18,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:22:18,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:22:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:22:18,983 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-07-20 11:22:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:18,983 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:22:18,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:22:18,983 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:22:19,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:19,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:22:19,267 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:22:19,268 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:22:19,268 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:22:19,268 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:22:19,268 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:22:19,268 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:22:19,268 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-07-20 11:22:19,268 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-07-20 11:22:19,269 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,269 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,269 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,269 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,269 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-07-20 11:22:19,269 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,269 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-07-20 11:22:19,270 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,270 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,270 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,270 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-07-20 11:22:19,270 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-07-20 11:22:19,270 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-07-20 11:22:19,270 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-07-20 11:22:19,271 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-07-20 11:22:19,271 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-07-20 11:22:19,271 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-07-20 11:22:19,271 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,271 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,271 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-07-20 11:22:19,271 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-07-20 11:22:19,271 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,272 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,272 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,272 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,272 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,272 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-07-20 11:22:19,272 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,272 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-07-20 11:22:19,272 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,272 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-07-20 11:22:19,273 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-07-20 11:22:19,273 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,273 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-07-20 11:22:19,273 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-07-20 11:22:19,273 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-07-20 11:22:19,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:22:19 BoogieIcfgContainer [2020-07-20 11:22:19,292 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:22:19,300 INFO L168 Benchmark]: Toolchain (without parser) took 15418.78 ms. Allocated memory was 136.8 MB in the beginning and 534.2 MB in the end (delta: 397.4 MB). Free memory was 101.5 MB in the beginning and 242.8 MB in the end (delta: -141.3 MB). Peak memory consumption was 256.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:19,302 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:22:19,303 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.86 ms. Allocated memory is still 136.8 MB. Free memory was 101.1 MB in the beginning and 90.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:19,303 INFO L168 Benchmark]: Boogie Preprocessor took 162.06 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.0 MB in the beginning and 178.9 MB in the end (delta: -88.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:19,304 INFO L168 Benchmark]: RCFGBuilder took 428.86 ms. Allocated memory is still 200.8 MB. Free memory was 178.9 MB in the beginning and 159.3 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:19,304 INFO L168 Benchmark]: TraceAbstraction took 14500.88 ms. Allocated memory was 200.8 MB in the beginning and 534.2 MB in the end (delta: 333.4 MB). Free memory was 159.3 MB in the beginning and 242.8 MB in the end (delta: -83.4 MB). Peak memory consumption was 250.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:19,306 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.86 ms. Allocated memory is still 136.8 MB. Free memory was 101.1 MB in the beginning and 90.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 162.06 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.0 MB in the beginning and 178.9 MB in the end (delta: -88.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 428.86 ms. Allocated memory is still 200.8 MB. Free memory was 178.9 MB in the beginning and 159.3 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14500.88 ms. Allocated memory was 200.8 MB in the beginning and 534.2 MB in the end (delta: 333.4 MB). Free memory was 159.3 MB in the beginning and 242.8 MB in the end (delta: -83.4 MB). Peak memory consumption was 250.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: 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: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.2s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 659 GetRequests, 631 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.6s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3128 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 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...