java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/max.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:42:26,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:42:26,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:42:26,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:42:26,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:42:26,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:42:26,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:42:26,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:42:26,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:42:26,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:42:26,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:42:26,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:42:26,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:42:26,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:42:26,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:42:26,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:42:26,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:42:26,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:42:26,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:42:26,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:42:26,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:42:26,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:42:26,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:42:26,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:42:26,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:42:26,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:42:26,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:42:26,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:42:26,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:42:26,127 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:42:26,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:42:26,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:42:26,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:42:26,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:42:26,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:42:26,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:42:26,135 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 [2019-10-14 23:42:26,155 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:42:26,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:42:26,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:42:26,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:42:26,158 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:42:26,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:42:26,158 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:42:26,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:42:26,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:42:26,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:42:26,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:42:26,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:42:26,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:42:26,161 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:42:26,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:42:26,161 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:42:26,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:42:26,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:42:26,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:42:26,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:42:26,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:42:26,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:26,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:42:26,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:42:26,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:42:26,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:42:26,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:42:26,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:42:26,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:42:26,469 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:42:26,487 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:42:26,490 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:42:26,492 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:42:26,492 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:42:26,493 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max.i [2019-10-14 23:42:26,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d560ad0a9/7174d7adb7a54bcda76da4664021d9b8/FLAG19118d5c7 [2019-10-14 23:42:27,028 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:42:27,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max.i [2019-10-14 23:42:27,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d560ad0a9/7174d7adb7a54bcda76da4664021d9b8/FLAG19118d5c7 [2019-10-14 23:42:27,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d560ad0a9/7174d7adb7a54bcda76da4664021d9b8 [2019-10-14 23:42:27,420 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:42:27,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:42:27,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:27,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:42:27,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:42:27,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:27" (1/1) ... [2019-10-14 23:42:27,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c0bab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:27, skipping insertion in model container [2019-10-14 23:42:27,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:27" (1/1) ... [2019-10-14 23:42:27,439 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:42:27,458 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:42:27,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:27,660 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:42:27,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:27,712 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:42:27,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:27 WrapperNode [2019-10-14 23:42:27,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:27,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:42:27,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:42:27,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:42:27,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:27" (1/1) ... [2019-10-14 23:42:27,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:27" (1/1) ... [2019-10-14 23:42:27,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:27" (1/1) ... [2019-10-14 23:42:27,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:27" (1/1) ... [2019-10-14 23:42:27,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:27" (1/1) ... [2019-10-14 23:42:27,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:27" (1/1) ... [2019-10-14 23:42:27,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:27" (1/1) ... [2019-10-14 23:42:27,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:42:27,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:42:27,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:42:27,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:42:27,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:27" (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 [2019-10-14 23:42:27,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:42:27,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:42:27,885 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2019-10-14 23:42:27,885 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:42:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:42:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:42:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure max [2019-10-14 23:42:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:42:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:42:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:42:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:42:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:42:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:42:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:42:28,198 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:42:28,198 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 23:42:28,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:28 BoogieIcfgContainer [2019-10-14 23:42:28,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:42:28,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:42:28,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:42:28,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:42:28,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:42:27" (1/3) ... [2019-10-14 23:42:28,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4f376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:28, skipping insertion in model container [2019-10-14 23:42:28,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:27" (2/3) ... [2019-10-14 23:42:28,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4f376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:28, skipping insertion in model container [2019-10-14 23:42:28,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:28" (3/3) ... [2019-10-14 23:42:28,208 INFO L109 eAbstractionObserver]: Analyzing ICFG max.i [2019-10-14 23:42:28,218 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:42:28,225 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:42:28,234 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:42:28,257 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:42:28,257 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:42:28,257 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:42:28,258 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:42:28,258 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:42:28,258 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:42:28,258 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:42:28,258 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:42:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 23:42:28,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:28,282 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:28,283 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:28,285 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:28,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:28,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1705268457, now seen corresponding path program 1 times [2019-10-14 23:42:28,299 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:28,300 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367239610] [2019-10-14 23:42:28,300 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:28,300 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:28,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:28,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367239610] [2019-10-14 23:42:28,516 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:28,516 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:42:28,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140607544] [2019-10-14 23:42:28,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:28,521 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:28,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:28,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:28,539 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-10-14 23:42:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:28,666 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2019-10-14 23:42:28,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:28,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:42:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:28,678 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:42:28,678 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:42:28,682 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:42:28,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 23:42:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:42:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 23:42:28,729 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-14 23:42:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:28,730 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 23:42:28,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 23:42:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:28,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:28,733 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:28,734 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:28,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:28,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1312973782, now seen corresponding path program 1 times [2019-10-14 23:42:28,735 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:28,735 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125022323] [2019-10-14 23:42:28,736 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:28,736 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:28,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:42:28,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125022323] [2019-10-14 23:42:28,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555587084] [2019-10-14 23:42:28,959 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:29,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 23:42:29,138 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:29,138 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2019-10-14 23:42:29,139 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040672561] [2019-10-14 23:42:29,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:29,143 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:29,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:29,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:29,145 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-10-14 23:42:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:29,220 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-10-14 23:42:29,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:29,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-14 23:42:29,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:29,223 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:42:29,223 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:42:29,225 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:42:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2019-10-14 23:42:29,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:42:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 23:42:29,244 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2019-10-14 23:42:29,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:29,245 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 23:42:29,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 23:42:29,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 23:42:29,248 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:29,249 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:29,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:29,453 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:29,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:29,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2020573253, now seen corresponding path program 1 times [2019-10-14 23:42:29,454 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:29,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447424476] [2019-10-14 23:42:29,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:29,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:29,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 23:42:29,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447424476] [2019-10-14 23:42:29,670 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:29,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:42:29,671 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185945827] [2019-10-14 23:42:29,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:42:29,672 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:29,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:42:29,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:29,673 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-10-14 23:42:29,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:29,790 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2019-10-14 23:42:29,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:29,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2019-10-14 23:42:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:29,793 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:42:29,793 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:42:29,793 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:42:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 23:42:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:42:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 23:42:29,801 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 44 [2019-10-14 23:42:29,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:29,803 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 23:42:29,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:42:29,803 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 23:42:29,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:42:29,805 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:29,805 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:29,805 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:29,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:29,806 INFO L82 PathProgramCache]: Analyzing trace with hash -2038260573, now seen corresponding path program 1 times [2019-10-14 23:42:29,806 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:29,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031008543] [2019-10-14 23:42:29,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:29,807 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:29,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:42:29,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031008543] [2019-10-14 23:42:29,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739224362] [2019-10-14 23:42:29,978 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:30,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:30,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 23:42:30,090 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:30,090 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2019-10-14 23:42:30,091 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661758980] [2019-10-14 23:42:30,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:30,092 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:30,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:30,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:30,092 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2019-10-14 23:42:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:30,299 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2019-10-14 23:42:30,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:30,301 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2019-10-14 23:42:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:30,302 INFO L225 Difference]: With dead ends: 57 [2019-10-14 23:42:30,302 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:42:30,304 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:30,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:42:30,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-10-14 23:42:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:42:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-10-14 23:42:30,311 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 46 [2019-10-14 23:42:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:30,312 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-10-14 23:42:30,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:30,312 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-10-14 23:42:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 23:42:30,314 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:30,314 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:30,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:30,515 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:30,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:30,516 INFO L82 PathProgramCache]: Analyzing trace with hash 423524670, now seen corresponding path program 2 times [2019-10-14 23:42:30,516 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:30,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463681123] [2019-10-14 23:42:30,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:30,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:30,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:31,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463681123] [2019-10-14 23:42:31,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588610692] [2019-10-14 23:42:31,514 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:31,582 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:31,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:31,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-14 23:42:31,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:31,814 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:42:31,818 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2019-10-14 23:42:31,819 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:42:31,836 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:42:31,836 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:42:31,837 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:7 [2019-10-14 23:42:32,081 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:42:32,083 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:42:32,084 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 25 [2019-10-14 23:42:32,085 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:42:32,108 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:42:32,109 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:42:32,109 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:29 [2019-10-14 23:42:32,199 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:42:32,202 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:42:32,203 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 25 [2019-10-14 23:42:32,203 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:42:32,220 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:42:32,221 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:42:32,221 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:19 [2019-10-14 23:42:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:42:32,629 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:32,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 38 [2019-10-14 23:42:32,630 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699630280] [2019-10-14 23:42:32,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 23:42:32,631 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:32,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 23:42:32,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:42:32,632 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 38 states. [2019-10-14 23:42:35,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:35,855 INFO L93 Difference]: Finished difference Result 155 states and 193 transitions. [2019-10-14 23:42:35,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-14 23:42:35,856 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 58 [2019-10-14 23:42:35,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:35,861 INFO L225 Difference]: With dead ends: 155 [2019-10-14 23:42:35,861 INFO L226 Difference]: Without dead ends: 124 [2019-10-14 23:42:35,871 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=906, Invalid=5100, Unknown=0, NotChecked=0, Total=6006 [2019-10-14 23:42:35,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-10-14 23:42:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 91. [2019-10-14 23:42:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 23:42:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2019-10-14 23:42:35,911 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 58 [2019-10-14 23:42:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:35,911 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2019-10-14 23:42:35,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 23:42:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2019-10-14 23:42:35,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 23:42:35,914 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:35,914 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:36,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:36,126 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:36,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1809728064, now seen corresponding path program 1 times [2019-10-14 23:42:36,127 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:36,127 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217624624] [2019-10-14 23:42:36,127 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,128 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat