/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:22:36,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:22:36,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:22:36,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:22:36,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:22:36,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:22:36,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:22:36,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:22:36,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:22:36,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:22:36,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:22:36,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:22:36,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:22:36,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:22:36,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:22:36,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:22:36,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:22:36,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:22:36,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:22:36,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:22:36,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:22:36,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:22:36,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:22:36,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:22:36,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:22:37,007 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 11:22:37,025 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:22:37,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:22:37,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:22:37,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:22:37,027 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:22:37,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:22:37,028 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:22:37,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:22:37,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:22:37,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:22:37,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:22:37,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:22:37,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:22:37,029 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:22:37,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:22:37,030 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:22:37,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:22:37,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:22:37,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:22:37,031 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:22:37,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:22:37,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:22:37,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:22:37,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:22:37,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:22:37,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:22:37,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:37,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:22:37,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:22:37,033 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 11:22:37,368 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:22:37,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:22:37,389 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:22:37,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:22:37,391 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:22:37,392 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-07-20 11:22:37,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31cb6a419/852671fd9c5447e98634044fb362bef0/FLAG589ece0f7 [2020-07-20 11:22:38,087 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:22:38,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c [2020-07-20 11:22:38,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31cb6a419/852671fd9c5447e98634044fb362bef0/FLAG589ece0f7 [2020-07-20 11:22:38,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31cb6a419/852671fd9c5447e98634044fb362bef0 [2020-07-20 11:22:38,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:22:38,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:22:38,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:22:38,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:22:38,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:22:38,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:22:38" (1/1) ... [2020-07-20 11:22:38,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30356062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:38, skipping insertion in model container [2020-07-20 11:22:38,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:22:38" (1/1) ... [2020-07-20 11:22:38,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:22:38,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:22:38,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:22:38,700 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:22:38,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:22:38,745 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:22:38,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:38 WrapperNode [2020-07-20 11:22:38,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:22:38,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:22:38,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:22:38,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:22:38,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:38" (1/1) ... [2020-07-20 11:22:38,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:38" (1/1) ... [2020-07-20 11:22:38,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:38" (1/1) ... [2020-07-20 11:22:38,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:38" (1/1) ... [2020-07-20 11:22:38,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:38" (1/1) ... [2020-07-20 11:22:38,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:38" (1/1) ... [2020-07-20 11:22:38,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:38" (1/1) ... [2020-07-20 11:22:38,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:22:38,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:22:38,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:22:38,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:22:38,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:38" (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 11:22:38,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:22:38,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:22:38,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:22:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:22:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:22:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:22:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:22:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:22:39,272 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:22:39,273 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:22:39,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:22:39 BoogieIcfgContainer [2020-07-20 11:22:39,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:22:39,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:22:39,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:22:39,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:22:39,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:22:38" (1/3) ... [2020-07-20 11:22:39,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31337152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:22:39, skipping insertion in model container [2020-07-20 11:22:39,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:22:38" (2/3) ... [2020-07-20 11:22:39,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31337152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:22:39, skipping insertion in model container [2020-07-20 11:22:39,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:22:39" (3/3) ... [2020-07-20 11:22:39,292 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-07-20 11:22:39,308 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:22:39,319 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:22:39,340 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:22:39,394 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:22:39,395 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:22:39,395 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:22:39,396 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:22:39,396 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:22:39,397 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:22:39,397 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:22:39,397 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:22:39,429 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 11:22:39,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 11:22:39,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:39,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:39,442 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:39,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:39,452 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-07-20 11:22:39,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:39,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520237619] [2020-07-20 11:22:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:22:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:39,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:39,656 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 11:22:39,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:39,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520237619] [2020-07-20 11:22:39,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:39,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:39,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167808785] [2020-07-20 11:22:39,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:39,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:39,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:39,684 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-20 11:22:39,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:39,758 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-07-20 11:22:39,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:39,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 11:22:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:39,776 INFO L225 Difference]: With dead ends: 63 [2020-07-20 11:22:39,777 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 11:22:39,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:39,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 11:22:39,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-07-20 11:22:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 11:22:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-07-20 11:22:39,834 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-07-20 11:22:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:39,834 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-07-20 11:22:39,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-07-20 11:22:39,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 11:22:39,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:39,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:40,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:40,052 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:40,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-07-20 11:22:40,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:40,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323161213] [2020-07-20 11:22:40,055 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 11:22:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:40,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:40,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:40,139 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 11:22:40,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:40,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323161213] [2020-07-20 11:22:40,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:40,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:40,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680307175] [2020-07-20 11:22:40,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:40,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:40,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:40,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:40,145 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-07-20 11:22:40,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:40,176 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-07-20 11:22:40,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:40,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-20 11:22:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:40,179 INFO L225 Difference]: With dead ends: 77 [2020-07-20 11:22:40,180 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 11:22:40,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:40,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 11:22:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-07-20 11:22:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 11:22:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-07-20 11:22:40,192 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-07-20 11:22:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:40,193 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-07-20 11:22:40,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-07-20 11:22:40,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:22:40,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:40,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:40,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:40,398 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:40,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:40,399 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-07-20 11:22:40,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:40,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289847745] [2020-07-20 11:22:40,401 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 11:22:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:40,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:40,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:40,496 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 11:22:40,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:40,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289847745] [2020-07-20 11:22:40,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:40,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:40,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063709006] [2020-07-20 11:22:40,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:40,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:40,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:40,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:40,503 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-07-20 11:22:40,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:40,538 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-07-20 11:22:40,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:40,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 11:22:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:40,541 INFO L225 Difference]: With dead ends: 72 [2020-07-20 11:22:40,541 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 11:22:40,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 11:22:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-07-20 11:22:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 11:22:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-07-20 11:22:40,564 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-07-20 11:22:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:40,565 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-07-20 11:22:40,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-07-20 11:22:40,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:22:40,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:40,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:40,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:40,785 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:40,786 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-07-20 11:22:40,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:40,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374294969] [2020-07-20 11:22:40,787 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 11:22:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:40,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:40,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:40,843 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 11:22:40,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:40,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374294969] [2020-07-20 11:22:40,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:40,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:40,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464692065] [2020-07-20 11:22:40,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:40,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:40,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:40,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:40,847 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-07-20 11:22:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:40,876 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-07-20 11:22:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:40,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 11:22:40,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:40,878 INFO L225 Difference]: With dead ends: 88 [2020-07-20 11:22:40,879 INFO L226 Difference]: Without dead ends: 86 [2020-07-20 11:22:40,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:40,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-20 11:22:40,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-07-20 11:22:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 11:22:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-07-20 11:22:40,893 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-07-20 11:22:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:40,893 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-07-20 11:22:40,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:40,894 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-07-20 11:22:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 11:22:40,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:40,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:41,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:41,111 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:41,111 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-07-20 11:22:41,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:41,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008732885] [2020-07-20 11:22:41,113 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 11:22:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:41,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:41,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:41,172 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 11:22:41,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:41,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008732885] [2020-07-20 11:22:41,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:41,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:41,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55769765] [2020-07-20 11:22:41,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:41,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:41,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:41,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:41,179 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-07-20 11:22:41,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:41,217 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-07-20 11:22:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:41,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 11:22:41,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:41,220 INFO L225 Difference]: With dead ends: 144 [2020-07-20 11:22:41,220 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 11:22:41,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 11:22:41,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-07-20 11:22:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-20 11:22:41,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-07-20 11:22:41,234 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-07-20 11:22:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:41,234 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-07-20 11:22:41,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-07-20 11:22:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:22:41,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:41,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:41,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:41,438 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:41,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:41,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-07-20 11:22:41,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:41,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169138732] [2020-07-20 11:22:41,441 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 11:22:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:41,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:41,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:41,496 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 11:22:41,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:41,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169138732] [2020-07-20 11:22:41,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:41,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:41,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032903705] [2020-07-20 11:22:41,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:41,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:41,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:41,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:41,504 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-07-20 11:22:41,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:41,546 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-07-20 11:22:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:41,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 11:22:41,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:41,548 INFO L225 Difference]: With dead ends: 129 [2020-07-20 11:22:41,548 INFO L226 Difference]: Without dead ends: 90 [2020-07-20 11:22:41,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-20 11:22:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-07-20 11:22:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 11:22:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-07-20 11:22:41,580 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-07-20 11:22:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:41,581 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-07-20 11:22:41,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:41,581 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-07-20 11:22:41,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:22:41,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:41,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:41,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:41,797 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:41,798 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-07-20 11:22:41,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:41,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169568552] [2020-07-20 11:22:41,800 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 11:22:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:41,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:41,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:41,845 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 11:22:41,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:41,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169568552] [2020-07-20 11:22:41,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:41,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:41,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244554582] [2020-07-20 11:22:41,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:41,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:41,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:41,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:41,849 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-07-20 11:22:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:41,881 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-07-20 11:22:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:41,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 11:22:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:41,885 INFO L225 Difference]: With dead ends: 156 [2020-07-20 11:22:41,885 INFO L226 Difference]: Without dead ends: 154 [2020-07-20 11:22:41,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-07-20 11:22:41,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-07-20 11:22:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 11:22:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-07-20 11:22:41,899 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-07-20 11:22:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:41,900 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-07-20 11:22:41,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:41,900 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-07-20 11:22:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:22:41,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:41,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:42,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:42,118 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:42,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:42,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-07-20 11:22:42,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:42,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766964633] [2020-07-20 11:22:42,120 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 11:22:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:42,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:42,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:42,167 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 11:22:42,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:42,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766964633] [2020-07-20 11:22:42,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:42,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:42,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330816235] [2020-07-20 11:22:42,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:42,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:42,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:42,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:42,172 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-07-20 11:22:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:42,201 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-07-20 11:22:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:42,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 11:22:42,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:42,203 INFO L225 Difference]: With dead ends: 272 [2020-07-20 11:22:42,203 INFO L226 Difference]: Without dead ends: 162 [2020-07-20 11:22:42,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:42,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-20 11:22:42,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-07-20 11:22:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-20 11:22:42,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-07-20 11:22:42,224 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-07-20 11:22:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:42,224 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-07-20 11:22:42,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-07-20 11:22:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:22:42,228 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:42,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:42,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:42,437 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-07-20 11:22:42,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:42,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941226260] [2020-07-20 11:22:42,439 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 11:22:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:42,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:42,487 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 11:22:42,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:42,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941226260] [2020-07-20 11:22:42,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:42,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:42,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107616684] [2020-07-20 11:22:42,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:42,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:42,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:42,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:42,490 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-07-20 11:22:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:42,514 INFO L93 Difference]: Finished difference Result 240 states and 360 transitions. [2020-07-20 11:22:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:42,515 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 11:22:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:42,516 INFO L225 Difference]: With dead ends: 240 [2020-07-20 11:22:42,516 INFO L226 Difference]: Without dead ends: 166 [2020-07-20 11:22:42,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-20 11:22:42,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-07-20 11:22:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-20 11:22:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-07-20 11:22:42,531 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 19 [2020-07-20 11:22:42,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:42,532 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-07-20 11:22:42,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-07-20 11:22:42,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:22:42,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:42,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:42,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:42,749 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:42,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1554860230, now seen corresponding path program 1 times [2020-07-20 11:22:42,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:42,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145906119] [2020-07-20 11:22:42,751 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 11:22:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:42,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:42,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:42,799 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 11:22:42,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:42,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145906119] [2020-07-20 11:22:42,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:42,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:42,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681637178] [2020-07-20 11:22:42,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:42,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:42,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:42,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:42,806 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 3 states. [2020-07-20 11:22:42,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:42,853 INFO L93 Difference]: Finished difference Result 284 states and 424 transitions. [2020-07-20 11:22:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:42,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 11:22:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:42,857 INFO L225 Difference]: With dead ends: 284 [2020-07-20 11:22:42,857 INFO L226 Difference]: Without dead ends: 282 [2020-07-20 11:22:42,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-07-20 11:22:42,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2020-07-20 11:22:42,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-20 11:22:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-07-20 11:22:42,876 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-07-20 11:22:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:42,876 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-07-20 11:22:42,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:42,877 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-07-20 11:22:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:22:42,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:42,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:43,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:43,093 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:43,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-07-20 11:22:43,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:43,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558552327] [2020-07-20 11:22:43,094 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 11:22:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:43,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:43,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:43,151 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 11:22:43,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:43,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558552327] [2020-07-20 11:22:43,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:43,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:43,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469265858] [2020-07-20 11:22:43,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:43,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:43,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:43,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:43,154 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-07-20 11:22:43,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:43,196 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-07-20 11:22:43,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:43,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 11:22:43,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:43,206 INFO L225 Difference]: With dead ends: 524 [2020-07-20 11:22:43,206 INFO L226 Difference]: Without dead ends: 306 [2020-07-20 11:22:43,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:43,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-07-20 11:22:43,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-07-20 11:22:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-07-20 11:22:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-07-20 11:22:43,250 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-07-20 11:22:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:43,250 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-07-20 11:22:43,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-07-20 11:22:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:22:43,252 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:43,253 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 11:22:43,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:43,468 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:43,470 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-07-20 11:22:43,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:43,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49758573] [2020-07-20 11:22:43,471 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 11:22:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:43,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:43,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:43,512 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 11:22:43,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:43,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49758573] [2020-07-20 11:22:43,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:43,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:43,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338575921] [2020-07-20 11:22:43,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:43,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:43,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:43,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:43,515 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-07-20 11:22:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:43,546 INFO L93 Difference]: Finished difference Result 456 states and 628 transitions. [2020-07-20 11:22:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:43,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 11:22:43,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:43,550 INFO L225 Difference]: With dead ends: 456 [2020-07-20 11:22:43,550 INFO L226 Difference]: Without dead ends: 314 [2020-07-20 11:22:43,554 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 11:22:43,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-07-20 11:22:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-07-20 11:22:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-07-20 11:22:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2020-07-20 11:22:43,572 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 20 [2020-07-20 11:22:43,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:43,573 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2020-07-20 11:22:43,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2020-07-20 11:22:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:22:43,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:43,575 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 11:22:43,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:43,788 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:43,789 INFO L82 PathProgramCache]: Analyzing trace with hash 563215563, now seen corresponding path program 1 times [2020-07-20 11:22:43,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:43,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893481422] [2020-07-20 11:22:43,790 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 11:22:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:43,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:43,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:43,828 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 11:22:43,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:43,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893481422] [2020-07-20 11:22:43,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:43,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:43,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823410222] [2020-07-20 11:22:43,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:43,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:43,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:43,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:43,831 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand 3 states. [2020-07-20 11:22:43,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:43,864 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2020-07-20 11:22:43,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:43,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 11:22:43,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:43,869 INFO L225 Difference]: With dead ends: 524 [2020-07-20 11:22:43,869 INFO L226 Difference]: Without dead ends: 522 [2020-07-20 11:22:43,870 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 11:22:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-07-20 11:22:43,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 456. [2020-07-20 11:22:43,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-07-20 11:22:43,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-07-20 11:22:43,889 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-07-20 11:22:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:43,890 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-07-20 11:22:43,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:43,890 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-07-20 11:22:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:22:43,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:43,892 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 11:22:44,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:44,107 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-07-20 11:22:44,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:44,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739096713] [2020-07-20 11:22:44,109 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 11:22:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:44,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:44,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:44,151 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 11:22:44,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:44,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739096713] [2020-07-20 11:22:44,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:44,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:44,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962496174] [2020-07-20 11:22:44,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:44,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:44,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:44,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:44,155 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-07-20 11:22:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:44,199 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-07-20 11:22:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:44,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 11:22:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:44,207 INFO L225 Difference]: With dead ends: 1020 [2020-07-20 11:22:44,207 INFO L226 Difference]: Without dead ends: 586 [2020-07-20 11:22:44,211 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 11:22:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-07-20 11:22:44,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-07-20 11:22:44,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-07-20 11:22:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-07-20 11:22:44,242 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-07-20 11:22:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:44,242 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-07-20 11:22:44,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-07-20 11:22:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:22:44,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:44,246 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 11:22:44,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:44,461 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:44,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:44,462 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-07-20 11:22:44,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:44,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841494761] [2020-07-20 11:22:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:22:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:44,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:44,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:44,542 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 11:22:44,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:44,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841494761] [2020-07-20 11:22:44,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:44,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:44,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893385042] [2020-07-20 11:22:44,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:44,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:44,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:44,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:44,555 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-07-20 11:22:44,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:44,590 INFO L93 Difference]: Finished difference Result 876 states and 1080 transitions. [2020-07-20 11:22:44,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:44,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 11:22:44,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:44,597 INFO L225 Difference]: With dead ends: 876 [2020-07-20 11:22:44,597 INFO L226 Difference]: Without dead ends: 602 [2020-07-20 11:22:44,602 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 11:22:44,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-07-20 11:22:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 600. [2020-07-20 11:22:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-07-20 11:22:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 726 transitions. [2020-07-20 11:22:44,628 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 726 transitions. Word has length 21 [2020-07-20 11:22:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:44,629 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 726 transitions. [2020-07-20 11:22:44,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 726 transitions. [2020-07-20 11:22:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:22:44,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:44,632 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 11:22:44,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:44,845 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:44,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:44,845 INFO L82 PathProgramCache]: Analyzing trace with hash -112997701, now seen corresponding path program 1 times [2020-07-20 11:22:44,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:44,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977865395] [2020-07-20 11:22:44,846 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 11:22:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:44,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:44,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:44,886 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 11:22:44,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:44,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977865395] [2020-07-20 11:22:44,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:44,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:44,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044571619] [2020-07-20 11:22:44,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:44,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:44,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:44,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:44,890 INFO L87 Difference]: Start difference. First operand 600 states and 726 transitions. Second operand 3 states. [2020-07-20 11:22:44,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:44,928 INFO L93 Difference]: Finished difference Result 970 states and 1159 transitions. [2020-07-20 11:22:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:44,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 11:22:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:44,934 INFO L225 Difference]: With dead ends: 970 [2020-07-20 11:22:44,935 INFO L226 Difference]: Without dead ends: 968 [2020-07-20 11:22:44,936 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 11:22:44,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-07-20 11:22:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 904. [2020-07-20 11:22:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-07-20 11:22:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2020-07-20 11:22:44,974 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 21 [2020-07-20 11:22:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:44,974 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2020-07-20 11:22:44,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:44,975 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2020-07-20 11:22:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:22:44,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:44,978 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 11:22:45,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:45,192 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:45,193 INFO L82 PathProgramCache]: Analyzing trace with hash 567060669, now seen corresponding path program 1 times [2020-07-20 11:22:45,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:45,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703052294] [2020-07-20 11:22:45,193 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 11:22:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:45,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:22:45,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:45,235 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 11:22:45,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:22:45,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703052294] [2020-07-20 11:22:45,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:22:45,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:22:45,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261766441] [2020-07-20 11:22:45,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:22:45,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:45,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:22:45,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:22:45,238 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand 3 states. [2020-07-20 11:22:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:45,282 INFO L93 Difference]: Finished difference Result 1992 states and 2278 transitions. [2020-07-20 11:22:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:22:45,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 11:22:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:45,283 INFO L225 Difference]: With dead ends: 1992 [2020-07-20 11:22:45,284 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:22:45,288 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 11:22:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:22:45,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:22:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:22:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:22:45,290 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-07-20 11:22:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:45,290 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:22:45,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:22:45,290 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:22:45,290 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:22:45,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:45,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:22:45,550 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:22:45,551 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:22:45,551 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:22:45,551 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:22:45,551 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:22:45,551 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:22:45,552 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-07-20 11:22:45,552 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-07-20 11:22:45,552 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 11:22:45,552 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-07-20 11:22:45,553 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-07-20 11:22:45,553 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-07-20 11:22:45,553 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 11:22:45,553 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 11:22:45,553 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 11:22:45,553 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-07-20 11:22:45,554 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-07-20 11:22:45,554 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-07-20 11:22:45,554 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-07-20 11:22:45,554 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-07-20 11:22:45,554 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-07-20 11:22:45,555 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 11:22:45,555 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-07-20 11:22:45,555 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-07-20 11:22:45,555 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-07-20 11:22:45,555 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-07-20 11:22:45,555 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 11:22:45,555 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 11:22:45,556 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 11:22:45,556 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-07-20 11:22:45,556 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 11:22:45,556 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-07-20 11:22:45,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:22:45 BoogieIcfgContainer [2020-07-20 11:22:45,571 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:22:45,575 INFO L168 Benchmark]: Toolchain (without parser) took 7186.39 ms. Allocated memory was 142.1 MB in the beginning and 255.3 MB in the end (delta: 113.2 MB). Free memory was 100.1 MB in the beginning and 165.3 MB in the end (delta: -65.2 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:45,576 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:22:45,576 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.04 ms. Allocated memory is still 142.1 MB. Free memory was 99.7 MB in the beginning and 89.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:45,577 INFO L168 Benchmark]: Boogie Preprocessor took 159.58 ms. Allocated memory was 142.1 MB in the beginning and 200.3 MB in the end (delta: 58.2 MB). Free memory was 89.6 MB in the beginning and 177.6 MB in the end (delta: -88.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:45,578 INFO L168 Benchmark]: RCFGBuilder took 372.07 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 161.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:45,578 INFO L168 Benchmark]: TraceAbstraction took 6290.00 ms. Allocated memory was 200.3 MB in the beginning and 255.3 MB in the end (delta: 55.1 MB). Free memory was 161.2 MB in the beginning and 165.3 MB in the end (delta: -4.1 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:22:45,581 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 355.04 ms. Allocated memory is still 142.1 MB. Free memory was 99.7 MB in the beginning and 89.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 159.58 ms. Allocated memory was 142.1 MB in the beginning and 200.3 MB in the end (delta: 58.2 MB). Free memory was 89.6 MB in the beginning and 177.6 MB in the end (delta: -88.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 372.07 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 161.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6290.00 ms. Allocated memory was 200.3 MB in the beginning and 255.3 MB in the end (delta: 55.1 MB). Free memory was 161.2 MB in the beginning and 165.3 MB in the end (delta: -4.1 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 105]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 923 SDtfs, 417 SDslu, 612 SDs, 0 SdLazy, 91 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 300 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 270 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 9690 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1268 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...