/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_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:13:22,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:13:22,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:13:22,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:13:22,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:13:22,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:13:22,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:13:22,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:13:22,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:13:22,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:13:22,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:13:22,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:13:22,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:13:22,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:13:22,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:13:22,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:13:22,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:13:22,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:13:22,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:13:22,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:13:22,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:13:22,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:13:22,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:13:22,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:13:22,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:13:22,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:13:22,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:13:22,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:13:22,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:13:22,754 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:13:22,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:13:22,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:13:22,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:13:22,761 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:13:22,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:13:22,762 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:13:22,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:13:22,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:13:22,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:13:22,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:13:22,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:13:22,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:13:22,766 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:13:22,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:13:22,767 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:13:22,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:13:22,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:13:22,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:13:22,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:13:22,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:13:22,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:13:22,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:13:22,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:13:22,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:13:22,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:13:22,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:22,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:13:22,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:13:22,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:13:23,070 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:13:23,084 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:13:23,088 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:13:23,089 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:13:23,090 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:13:23,090 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-07-21 11:13:23,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ccd48232/c740f2486af9437da63d17da03a234fb/FLAGb9d4e9032 [2020-07-21 11:13:23,716 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:13:23,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2020-07-21 11:13:23,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ccd48232/c740f2486af9437da63d17da03a234fb/FLAGb9d4e9032 [2020-07-21 11:13:24,051 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ccd48232/c740f2486af9437da63d17da03a234fb [2020-07-21 11:13:24,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:13:24,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:13:24,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:13:24,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:13:24,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:13:24,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:24" (1/1) ... [2020-07-21 11:13:24,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8201e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:24, skipping insertion in model container [2020-07-21 11:13:24,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:24" (1/1) ... [2020-07-21 11:13:24,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:13:24,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:13:24,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:13:24,307 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:13:24,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:13:24,353 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:13:24,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:24 WrapperNode [2020-07-21 11:13:24,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:13:24,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:13:24,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:13:24,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:13:24,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:24" (1/1) ... [2020-07-21 11:13:24,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:24" (1/1) ... [2020-07-21 11:13:24,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:24" (1/1) ... [2020-07-21 11:13:24,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:24" (1/1) ... [2020-07-21 11:13:24,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:24" (1/1) ... [2020-07-21 11:13:24,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:24" (1/1) ... [2020-07-21 11:13:24,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:24" (1/1) ... [2020-07-21 11:13:24,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:13:24,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:13:24,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:13:24,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:13:24,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:13:24,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:13:24,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:13:24,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:13:24,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:13:24,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:13:24,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:13:24,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:13:24,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:13:24,934 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:13:24,935 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:13:24,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:24 BoogieIcfgContainer [2020-07-21 11:13:24,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:13:24,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:13:24,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:13:24,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:13:24,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:13:24" (1/3) ... [2020-07-21 11:13:24,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71516748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:24, skipping insertion in model container [2020-07-21 11:13:24,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:24" (2/3) ... [2020-07-21 11:13:24,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71516748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:24, skipping insertion in model container [2020-07-21 11:13:24,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:24" (3/3) ... [2020-07-21 11:13:24,955 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-07-21 11:13:24,970 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:13:24,981 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:13:24,997 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:13:25,028 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:13:25,029 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:13:25,029 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:13:25,030 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:13:25,030 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:13:25,031 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:13:25,031 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:13:25,031 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:13:25,074 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-07-21 11:13:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:25,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:25,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:25,093 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:25,104 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-07-21 11:13:25,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:25,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607588792] [2020-07-21 11:13:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:25,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:25,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:25,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:25,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607588792] [2020-07-21 11:13:25,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:25,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:25,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935116555] [2020-07-21 11:13:25,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:25,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:25,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:25,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:25,303 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-07-21 11:13:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:25,373 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-07-21 11:13:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:25,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:25,390 INFO L225 Difference]: With dead ends: 93 [2020-07-21 11:13:25,391 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 11:13:25,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 11:13:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-07-21 11:13:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 11:13:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-07-21 11:13:25,449 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-07-21 11:13:25,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:25,450 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-07-21 11:13:25,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:25,450 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-07-21 11:13:25,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:25,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:25,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:25,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:25,655 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:25,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-07-21 11:13:25,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:25,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772196178] [2020-07-21 11:13:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:25,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:25,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:25,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:25,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772196178] [2020-07-21 11:13:25,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:25,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:25,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917198647] [2020-07-21 11:13:25,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:25,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:25,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:25,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:25,743 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-07-21 11:13:25,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:25,779 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-07-21 11:13:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:25,780 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:25,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:25,783 INFO L225 Difference]: With dead ends: 127 [2020-07-21 11:13:25,783 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 11:13:25,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 11:13:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-07-21 11:13:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 11:13:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-07-21 11:13:25,799 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-07-21 11:13:25,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:25,799 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-07-21 11:13:25,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:25,799 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-07-21 11:13:25,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:13:25,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:25,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:26,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:26,017 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:26,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:26,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-07-21 11:13:26,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:26,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552787317] [2020-07-21 11:13:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:26,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:26,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:26,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:26,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552787317] [2020-07-21 11:13:26,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:26,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:26,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539252357] [2020-07-21 11:13:26,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:26,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:26,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:26,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:26,095 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-07-21 11:13:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:26,137 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-07-21 11:13:26,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:26,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 11:13:26,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:26,141 INFO L225 Difference]: With dead ends: 117 [2020-07-21 11:13:26,141 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 11:13:26,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 11:13:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-07-21 11:13:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 11:13:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-07-21 11:13:26,167 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-07-21 11:13:26,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:26,168 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-07-21 11:13:26,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:26,168 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-07-21 11:13:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:13:26,172 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:26,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:26,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:26,375 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:26,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:26,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-07-21 11:13:26,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:26,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401855552] [2020-07-21 11:13:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:26,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:26,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:26,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:26,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401855552] [2020-07-21 11:13:26,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:26,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:26,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948483335] [2020-07-21 11:13:26,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:26,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:26,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:26,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:26,460 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-07-21 11:13:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:26,496 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-07-21 11:13:26,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:26,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 11:13:26,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:26,499 INFO L225 Difference]: With dead ends: 148 [2020-07-21 11:13:26,500 INFO L226 Difference]: Without dead ends: 146 [2020-07-21 11:13:26,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-21 11:13:26,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-07-21 11:13:26,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-21 11:13:26,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-07-21 11:13:26,513 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-07-21 11:13:26,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:26,514 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-07-21 11:13:26,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:26,514 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-07-21 11:13:26,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:13:26,515 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:26,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:26,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:26,721 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-07-21 11:13:26,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:26,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227827192] [2020-07-21 11:13:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:26,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:26,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:26,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227827192] [2020-07-21 11:13:26,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:26,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:26,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582429742] [2020-07-21 11:13:26,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:26,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:26,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:26,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:26,809 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-07-21 11:13:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:26,830 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-07-21 11:13:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:26,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 11:13:26,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:26,832 INFO L225 Difference]: With dead ends: 244 [2020-07-21 11:13:26,832 INFO L226 Difference]: Without dead ends: 148 [2020-07-21 11:13:26,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-07-21 11:13:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-07-21 11:13:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-21 11:13:26,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-07-21 11:13:26,847 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-07-21 11:13:26,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:26,848 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-07-21 11:13:26,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-07-21 11:13:26,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:13:26,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:26,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:27,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:27,067 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:27,068 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-07-21 11:13:27,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:27,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466381172] [2020-07-21 11:13:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:27,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:27,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:27,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:27,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466381172] [2020-07-21 11:13:27,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:27,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:27,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324624252] [2020-07-21 11:13:27,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:27,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:27,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:27,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:27,133 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-07-21 11:13:27,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:27,158 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-07-21 11:13:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:27,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 11:13:27,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:27,161 INFO L225 Difference]: With dead ends: 219 [2020-07-21 11:13:27,161 INFO L226 Difference]: Without dead ends: 150 [2020-07-21 11:13:27,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:27,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-21 11:13:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-07-21 11:13:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-21 11:13:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-07-21 11:13:27,174 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-07-21 11:13:27,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:27,174 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-07-21 11:13:27,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-07-21 11:13:27,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:13:27,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:27,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:27,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:27,390 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:27,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-07-21 11:13:27,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:27,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151209533] [2020-07-21 11:13:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:27,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:27,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:27,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:27,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151209533] [2020-07-21 11:13:27,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:27,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:27,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631187135] [2020-07-21 11:13:27,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:27,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:27,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:27,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:27,457 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-07-21 11:13:27,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:27,482 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-07-21 11:13:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:27,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 11:13:27,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:27,488 INFO L225 Difference]: With dead ends: 276 [2020-07-21 11:13:27,488 INFO L226 Difference]: Without dead ends: 274 [2020-07-21 11:13:27,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-21 11:13:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-07-21 11:13:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-21 11:13:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-07-21 11:13:27,513 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-07-21 11:13:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:27,515 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-07-21 11:13:27,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-07-21 11:13:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:13:27,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:27,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:27,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:27,720 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:27,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-07-21 11:13:27,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:27,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846869562] [2020-07-21 11:13:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:27,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:27,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:27,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:27,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846869562] [2020-07-21 11:13:27,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:27,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:27,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944882687] [2020-07-21 11:13:27,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:27,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:27,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:27,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:27,774 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-07-21 11:13:27,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:27,806 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-07-21 11:13:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:27,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 11:13:27,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:27,809 INFO L225 Difference]: With dead ends: 472 [2020-07-21 11:13:27,809 INFO L226 Difference]: Without dead ends: 282 [2020-07-21 11:13:27,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:27,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-07-21 11:13:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-07-21 11:13:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-07-21 11:13:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-07-21 11:13:27,833 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-07-21 11:13:27,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:27,834 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-07-21 11:13:27,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:27,834 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-07-21 11:13:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 11:13:27,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:27,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:28,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:28,053 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:28,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:28,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-07-21 11:13:28,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:28,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610824680] [2020-07-21 11:13:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:28,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:28,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:28,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:28,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610824680] [2020-07-21 11:13:28,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:28,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:28,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460573230] [2020-07-21 11:13:28,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:28,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:28,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:28,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:28,108 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-07-21 11:13:28,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:28,136 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-07-21 11:13:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:28,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 11:13:28,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:28,139 INFO L225 Difference]: With dead ends: 420 [2020-07-21 11:13:28,139 INFO L226 Difference]: Without dead ends: 286 [2020-07-21 11:13:28,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:28,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-07-21 11:13:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-07-21 11:13:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-07-21 11:13:28,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-07-21 11:13:28,154 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-07-21 11:13:28,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:28,155 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-07-21 11:13:28,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:28,155 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-07-21 11:13:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 11:13:28,157 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:28,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:28,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:28,373 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:28,374 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-07-21 11:13:28,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:28,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948841924] [2020-07-21 11:13:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:28,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:28,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:28,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:28,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948841924] [2020-07-21 11:13:28,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:28,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:28,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933451849] [2020-07-21 11:13:28,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:28,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:28,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:28,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:28,462 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-07-21 11:13:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:28,499 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-07-21 11:13:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:28,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 11:13:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:28,508 INFO L225 Difference]: With dead ends: 524 [2020-07-21 11:13:28,509 INFO L226 Difference]: Without dead ends: 522 [2020-07-21 11:13:28,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-07-21 11:13:28,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-07-21 11:13:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-07-21 11:13:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-07-21 11:13:28,532 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-07-21 11:13:28,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:28,535 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-07-21 11:13:28,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-07-21 11:13:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 11:13:28,537 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:28,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:28,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:28,754 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:28,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:28,755 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-07-21 11:13:28,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:28,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288286285] [2020-07-21 11:13:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:28,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:28,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:28,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:28,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288286285] [2020-07-21 11:13:28,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:28,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:28,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324198444] [2020-07-21 11:13:28,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:28,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:28,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:28,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:28,819 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-07-21 11:13:28,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:28,852 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-07-21 11:13:28,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:28,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 11:13:28,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:28,857 INFO L225 Difference]: With dead ends: 924 [2020-07-21 11:13:28,857 INFO L226 Difference]: Without dead ends: 546 [2020-07-21 11:13:28,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-07-21 11:13:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-07-21 11:13:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-07-21 11:13:28,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-07-21 11:13:28,881 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-07-21 11:13:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:28,881 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-07-21 11:13:28,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:28,881 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-07-21 11:13:28,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 11:13:28,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:28,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:29,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:29,099 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:29,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:29,100 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-07-21 11:13:29,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:29,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90146772] [2020-07-21 11:13:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:29,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:29,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:29,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:29,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90146772] [2020-07-21 11:13:29,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:29,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:29,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522094880] [2020-07-21 11:13:29,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:29,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:29,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:29,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:29,176 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-07-21 11:13:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:29,206 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-07-21 11:13:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:29,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 11:13:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:29,211 INFO L225 Difference]: With dead ends: 816 [2020-07-21 11:13:29,211 INFO L226 Difference]: Without dead ends: 554 [2020-07-21 11:13:29,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-07-21 11:13:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-07-21 11:13:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-07-21 11:13:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-07-21 11:13:29,231 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-07-21 11:13:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:29,232 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-07-21 11:13:29,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:29,232 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-07-21 11:13:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 11:13:29,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:29,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:29,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:29,452 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:29,452 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-07-21 11:13:29,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:29,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062243185] [2020-07-21 11:13:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:29,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:29,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:29,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:29,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062243185] [2020-07-21 11:13:29,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:29,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:29,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607139879] [2020-07-21 11:13:29,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:29,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:29,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:29,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:29,510 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-07-21 11:13:29,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:29,545 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-07-21 11:13:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:29,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 11:13:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:29,553 INFO L225 Difference]: With dead ends: 1004 [2020-07-21 11:13:29,553 INFO L226 Difference]: Without dead ends: 1002 [2020-07-21 11:13:29,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-07-21 11:13:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-07-21 11:13:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-07-21 11:13:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-07-21 11:13:29,588 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-07-21 11:13:29,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:29,589 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-07-21 11:13:29,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-07-21 11:13:29,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 11:13:29,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:29,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:29,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:29,806 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:29,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-07-21 11:13:29,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:29,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804066519] [2020-07-21 11:13:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:29,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:29,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:29,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:29,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804066519] [2020-07-21 11:13:29,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:29,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:29,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832005005] [2020-07-21 11:13:29,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:29,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:29,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:29,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:29,856 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-07-21 11:13:29,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:29,894 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-07-21 11:13:29,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:29,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 11:13:29,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:29,902 INFO L225 Difference]: With dead ends: 1820 [2020-07-21 11:13:29,902 INFO L226 Difference]: Without dead ends: 1066 [2020-07-21 11:13:29,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-07-21 11:13:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-07-21 11:13:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-07-21 11:13:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-07-21 11:13:29,943 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-07-21 11:13:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:29,943 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-07-21 11:13:29,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:29,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-07-21 11:13:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 11:13:29,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:29,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:30,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:30,161 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:30,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:30,161 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-07-21 11:13:30,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:30,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745946276] [2020-07-21 11:13:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:30,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:30,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:30,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:30,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745946276] [2020-07-21 11:13:30,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:30,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:30,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200614515] [2020-07-21 11:13:30,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:30,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:30,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:30,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:30,236 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-07-21 11:13:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:30,273 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-07-21 11:13:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:30,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 11:13:30,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:30,282 INFO L225 Difference]: With dead ends: 1596 [2020-07-21 11:13:30,282 INFO L226 Difference]: Without dead ends: 1082 [2020-07-21 11:13:30,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:30,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-07-21 11:13:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-07-21 11:13:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-07-21 11:13:30,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-07-21 11:13:30,325 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-07-21 11:13:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:30,326 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-07-21 11:13:30,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-07-21 11:13:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 11:13:30,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:30,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:30,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:30,543 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:30,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:30,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-07-21 11:13:30,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:30,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241770818] [2020-07-21 11:13:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:30,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:30,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:30,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:30,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241770818] [2020-07-21 11:13:30,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:30,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:30,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415747381] [2020-07-21 11:13:30,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:30,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:30,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:30,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:30,602 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-07-21 11:13:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:30,653 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-07-21 11:13:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:30,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 11:13:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:30,667 INFO L225 Difference]: With dead ends: 1932 [2020-07-21 11:13:30,667 INFO L226 Difference]: Without dead ends: 1930 [2020-07-21 11:13:30,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-07-21 11:13:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-07-21 11:13:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-07-21 11:13:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-07-21 11:13:30,785 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-07-21 11:13:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:30,785 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-07-21 11:13:30,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:30,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-07-21 11:13:30,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 11:13:30,790 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:30,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:31,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:31,005 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:31,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-07-21 11:13:31,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:31,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043417260] [2020-07-21 11:13:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:31,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:31,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:31,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:31,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043417260] [2020-07-21 11:13:31,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:31,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:31,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073936497] [2020-07-21 11:13:31,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:31,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:31,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:31,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:31,077 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-07-21 11:13:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:31,141 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-07-21 11:13:31,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:31,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 11:13:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:31,155 INFO L225 Difference]: With dead ends: 3596 [2020-07-21 11:13:31,156 INFO L226 Difference]: Without dead ends: 2090 [2020-07-21 11:13:31,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:31,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-07-21 11:13:31,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-07-21 11:13:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-07-21 11:13:31,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-07-21 11:13:31,262 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-07-21 11:13:31,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:31,263 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-07-21 11:13:31,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:31,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-07-21 11:13:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 11:13:31,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:31,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:31,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:31,483 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:31,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:31,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-07-21 11:13:31,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:31,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892740126] [2020-07-21 11:13:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:31,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:31,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:31,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:31,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892740126] [2020-07-21 11:13:31,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:31,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:31,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817435417] [2020-07-21 11:13:31,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:31,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:31,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:31,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:31,560 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-07-21 11:13:31,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:31,619 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-07-21 11:13:31,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:31,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 11:13:31,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:31,635 INFO L225 Difference]: With dead ends: 3132 [2020-07-21 11:13:31,635 INFO L226 Difference]: Without dead ends: 2122 [2020-07-21 11:13:31,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-07-21 11:13:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-07-21 11:13:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-07-21 11:13:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-07-21 11:13:31,735 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-07-21 11:13:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:31,736 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-07-21 11:13:31,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:31,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-07-21 11:13:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 11:13:31,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:31,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:31,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:31,954 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:31,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:31,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-07-21 11:13:31,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:31,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908175228] [2020-07-21 11:13:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:31,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:31,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:32,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:32,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908175228] [2020-07-21 11:13:32,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:32,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:32,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761300932] [2020-07-21 11:13:32,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:32,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:32,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:32,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:32,008 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-07-21 11:13:32,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:32,074 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-07-21 11:13:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:32,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 11:13:32,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:32,101 INFO L225 Difference]: With dead ends: 3724 [2020-07-21 11:13:32,101 INFO L226 Difference]: Without dead ends: 3722 [2020-07-21 11:13:32,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:32,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-07-21 11:13:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-07-21 11:13:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-07-21 11:13:32,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-07-21 11:13:32,267 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-07-21 11:13:32,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:32,267 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-07-21 11:13:32,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:32,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-07-21 11:13:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 11:13:32,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:32,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:32,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:32,491 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:32,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:32,492 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-07-21 11:13:32,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:32,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535405411] [2020-07-21 11:13:32,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:32,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:32,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:32,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:32,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535405411] [2020-07-21 11:13:32,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:32,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:32,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735755067] [2020-07-21 11:13:32,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:32,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:32,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:32,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:32,572 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-07-21 11:13:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:32,657 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-07-21 11:13:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:32,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 11:13:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:32,681 INFO L225 Difference]: With dead ends: 7116 [2020-07-21 11:13:32,681 INFO L226 Difference]: Without dead ends: 4106 [2020-07-21 11:13:32,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-07-21 11:13:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-07-21 11:13:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-07-21 11:13:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-07-21 11:13:32,824 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-07-21 11:13:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:32,824 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-07-21 11:13:32,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:32,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-07-21 11:13:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 11:13:32,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:32,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:33,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:33,046 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:33,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-07-21 11:13:33,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:33,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730675687] [2020-07-21 11:13:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:33,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:33,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:33,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:33,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730675687] [2020-07-21 11:13:33,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:33,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:33,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015688634] [2020-07-21 11:13:33,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:33,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:33,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:33,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:33,093 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-07-21 11:13:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:33,169 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-07-21 11:13:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:33,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-21 11:13:33,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:33,193 INFO L225 Difference]: With dead ends: 6156 [2020-07-21 11:13:33,194 INFO L226 Difference]: Without dead ends: 4170 [2020-07-21 11:13:33,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-07-21 11:13:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-07-21 11:13:33,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-07-21 11:13:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-07-21 11:13:33,412 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-07-21 11:13:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:33,412 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-07-21 11:13:33,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-07-21 11:13:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 11:13:33,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:33,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:33,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:33,633 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:33,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:33,634 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-07-21 11:13:33,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:33,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618321693] [2020-07-21 11:13:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:33,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:33,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:33,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618321693] [2020-07-21 11:13:33,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:33,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:33,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702164334] [2020-07-21 11:13:33,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:33,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:33,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:33,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:33,680 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-07-21 11:13:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:33,803 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-07-21 11:13:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:33,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-21 11:13:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:33,846 INFO L225 Difference]: With dead ends: 12108 [2020-07-21 11:13:33,846 INFO L226 Difference]: Without dead ends: 8074 [2020-07-21 11:13:33,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:33,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-07-21 11:13:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-07-21 11:13:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-07-21 11:13:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-07-21 11:13:34,105 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-07-21 11:13:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:34,105 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-07-21 11:13:34,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-07-21 11:13:34,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 11:13:34,118 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:34,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:34,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:34,333 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:34,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-07-21 11:13:34,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:34,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663646695] [2020-07-21 11:13:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:34,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:34,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:34,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:34,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663646695] [2020-07-21 11:13:34,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:34,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:34,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453172981] [2020-07-21 11:13:34,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:34,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:34,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:34,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:34,382 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-07-21 11:13:34,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:34,585 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-07-21 11:13:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:34,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-21 11:13:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:34,611 INFO L225 Difference]: With dead ends: 9100 [2020-07-21 11:13:34,611 INFO L226 Difference]: Without dead ends: 9098 [2020-07-21 11:13:34,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-07-21 11:13:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-07-21 11:13:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-07-21 11:13:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-07-21 11:13:34,846 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-07-21 11:13:34,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:34,847 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-07-21 11:13:34,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-07-21 11:13:34,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 11:13:34,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:34,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:35,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:35,076 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:35,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:35,078 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-07-21 11:13:35,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:35,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250937357] [2020-07-21 11:13:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:35,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:35,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:35,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250937357] [2020-07-21 11:13:35,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:35,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:35,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918487060] [2020-07-21 11:13:35,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:35,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:35,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:35,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:35,127 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-07-21 11:13:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:35,421 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-07-21 11:13:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:35,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-21 11:13:35,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:35,458 INFO L225 Difference]: With dead ends: 13708 [2020-07-21 11:13:35,459 INFO L226 Difference]: Without dead ends: 13706 [2020-07-21 11:13:35,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:35,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-07-21 11:13:35,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-07-21 11:13:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-07-21 11:13:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-07-21 11:13:35,770 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-07-21 11:13:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:35,771 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-07-21 11:13:35,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-07-21 11:13:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 11:13:35,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:35,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:36,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:36,014 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:36,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:36,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-07-21 11:13:36,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:36,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639688732] [2020-07-21 11:13:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:36,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:36,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:36,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:36,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639688732] [2020-07-21 11:13:36,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:36,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:36,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988470849] [2020-07-21 11:13:36,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:36,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:36,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:36,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:36,063 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-07-21 11:13:36,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:36,396 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-07-21 11:13:36,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:36,397 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-21 11:13:36,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:36,441 INFO L225 Difference]: With dead ends: 27788 [2020-07-21 11:13:36,441 INFO L226 Difference]: Without dead ends: 15754 [2020-07-21 11:13:36,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-07-21 11:13:36,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-07-21 11:13:36,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-07-21 11:13:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-07-21 11:13:36,820 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-07-21 11:13:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:36,821 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-07-21 11:13:36,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-07-21 11:13:36,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 11:13:36,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:36,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:37,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:37,058 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:37,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-07-21 11:13:37,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:37,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792734110] [2020-07-21 11:13:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:37,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:37,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:37,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:37,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792734110] [2020-07-21 11:13:37,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:37,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:37,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773852885] [2020-07-21 11:13:37,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:37,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:37,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:37,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:37,124 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-07-21 11:13:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:37,487 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-07-21 11:13:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:37,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-21 11:13:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:37,532 INFO L225 Difference]: With dead ends: 23820 [2020-07-21 11:13:37,532 INFO L226 Difference]: Without dead ends: 16138 [2020-07-21 11:13:37,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:37,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-07-21 11:13:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-07-21 11:13:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-07-21 11:13:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-07-21 11:13:37,926 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-07-21 11:13:37,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:37,927 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-07-21 11:13:37,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:37,927 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-07-21 11:13:37,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 11:13:37,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:37,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:38,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:38,167 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:38,168 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-07-21 11:13:38,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:38,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117757706] [2020-07-21 11:13:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:38,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:38,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:38,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:38,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117757706] [2020-07-21 11:13:38,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:38,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:38,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214605119] [2020-07-21 11:13:38,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:38,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:38,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:38,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:38,231 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-07-21 11:13:39,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:39,078 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-07-21 11:13:39,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:39,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-21 11:13:39,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:39,163 INFO L225 Difference]: With dead ends: 26636 [2020-07-21 11:13:39,164 INFO L226 Difference]: Without dead ends: 26634 [2020-07-21 11:13:39,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-07-21 11:13:39,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-07-21 11:13:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-07-21 11:13:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-07-21 11:13:39,724 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-07-21 11:13:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:39,725 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-07-21 11:13:39,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:39,725 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-07-21 11:13:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 11:13:39,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:39,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:39,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:39,977 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:39,978 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-07-21 11:13:39,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:39,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103142411] [2020-07-21 11:13:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:40,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:40,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:40,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:40,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103142411] [2020-07-21 11:13:40,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:40,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:40,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8397319] [2020-07-21 11:13:40,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:40,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:40,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:40,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:40,169 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-07-21 11:13:40,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:40,538 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-07-21 11:13:40,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:40,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-21 11:13:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:40,628 INFO L225 Difference]: With dead ends: 55308 [2020-07-21 11:13:40,629 INFO L226 Difference]: Without dead ends: 31242 [2020-07-21 11:13:40,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-07-21 11:13:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-07-21 11:13:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-07-21 11:13:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-07-21 11:13:41,586 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-07-21 11:13:41,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:41,586 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-07-21 11:13:41,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:41,587 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-07-21 11:13:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 11:13:41,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:41,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:41,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:41,835 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:41,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-07-21 11:13:41,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:41,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413746517] [2020-07-21 11:13:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:41,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:41,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:41,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:41,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413746517] [2020-07-21 11:13:41,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:41,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:41,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546261762] [2020-07-21 11:13:41,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:41,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:41,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:41,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:41,887 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-07-21 11:13:42,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:42,196 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-07-21 11:13:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:42,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-21 11:13:42,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:42,264 INFO L225 Difference]: With dead ends: 46860 [2020-07-21 11:13:42,264 INFO L226 Difference]: Without dead ends: 31754 [2020-07-21 11:13:42,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-07-21 11:13:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-07-21 11:13:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-07-21 11:13:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-07-21 11:13:43,820 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-07-21 11:13:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:43,820 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-07-21 11:13:43,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-07-21 11:13:43,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 11:13:43,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:43,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:44,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:44,062 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:44,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:44,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-07-21 11:13:44,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:44,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900221518] [2020-07-21 11:13:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:44,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:44,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:44,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:44,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900221518] [2020-07-21 11:13:44,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:44,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:44,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448507007] [2020-07-21 11:13:44,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:44,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:44,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:44,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:44,116 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-07-21 11:13:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:44,654 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-07-21 11:13:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:44,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-21 11:13:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:44,728 INFO L225 Difference]: With dead ends: 51210 [2020-07-21 11:13:44,728 INFO L226 Difference]: Without dead ends: 51208 [2020-07-21 11:13:44,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-07-21 11:13:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-07-21 11:13:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-07-21 11:13:45,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-07-21 11:13:45,489 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-07-21 11:13:45,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:45,489 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-07-21 11:13:45,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-07-21 11:13:45,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 11:13:45,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:45,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:45,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:45,736 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:45,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:45,737 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-07-21 11:13:45,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:45,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44439908] [2020-07-21 11:13:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:45,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:45,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:45,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:45,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44439908] [2020-07-21 11:13:45,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:45,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:45,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87794720] [2020-07-21 11:13:45,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:45,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:45,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:45,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:45,782 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-07-21 11:13:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:46,615 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-07-21 11:13:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:46,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-21 11:13:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:46,616 INFO L225 Difference]: With dead ends: 109576 [2020-07-21 11:13:46,616 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:13:46,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:13:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:13:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:13:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:13:46,727 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-07-21 11:13:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:46,727 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:13:46,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:13:46,728 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:13:46,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:46,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:13:47,005 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 11:13:47,005 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:13:47,005 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:13:47,006 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 11:13:47,006 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:13:47,006 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:13:47,006 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-07-21 11:13:47,006 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-07-21 11:13:47,006 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-07-21 11:13:47,006 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-07-21 11:13:47,007 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-07-21 11:13:47,007 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-07-21 11:13:47,007 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,007 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,007 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,007 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,007 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-21 11:13:47,007 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,008 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-07-21 11:13:47,008 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,008 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,008 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-07-21 11:13:47,008 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,008 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-07-21 11:13:47,008 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,009 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,009 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-07-21 11:13:47,009 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-07-21 11:13:47,009 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-07-21 11:13:47,009 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-07-21 11:13:47,009 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,009 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,010 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-07-21 11:13:47,010 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-07-21 11:13:47,010 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-07-21 11:13:47,010 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,010 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,010 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,010 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,010 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,011 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,011 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,011 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-07-21 11:13:47,011 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-07-21 11:13:47,011 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,011 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-07-21 11:13:47,011 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-07-21 11:13:47,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:13:47 BoogieIcfgContainer [2020-07-21 11:13:47,024 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:13:47,027 INFO L168 Benchmark]: Toolchain (without parser) took 22962.76 ms. Allocated memory was 138.4 MB in the beginning and 963.6 MB in the end (delta: 825.2 MB). Free memory was 102.2 MB in the beginning and 433.2 MB in the end (delta: -330.9 MB). Peak memory consumption was 494.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:47,028 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:13:47,028 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.18 ms. Allocated memory is still 138.4 MB. Free memory was 101.8 MB in the beginning and 90.6 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:47,028 INFO L168 Benchmark]: Boogie Preprocessor took 162.19 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 90.6 MB in the beginning and 182.1 MB in the end (delta: -91.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:47,029 INFO L168 Benchmark]: RCFGBuilder took 423.96 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 161.7 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:47,029 INFO L168 Benchmark]: TraceAbstraction took 22080.42 ms. Allocated memory was 203.9 MB in the beginning and 963.6 MB in the end (delta: 759.7 MB). Free memory was 161.1 MB in the beginning and 433.2 MB in the end (delta: -272.1 MB). Peak memory consumption was 487.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:47,031 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 288.18 ms. Allocated memory is still 138.4 MB. Free memory was 101.8 MB in the beginning and 90.6 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 162.19 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 90.6 MB in the beginning and 182.1 MB in the end (delta: -91.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 423.96 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 161.7 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22080.42 ms. Allocated memory was 203.9 MB in the beginning and 963.6 MB in the end (delta: 759.7 MB). Free memory was 161.1 MB in the beginning and 433.2 MB in the end (delta: -272.1 MB). Peak memory consumption was 487.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21.9s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 777 GetRequests, 746 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.3s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3761 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...