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/sep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:42:51,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:42:51,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:42:51,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:42:51,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:42:51,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:42:51,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:42:51,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:42:51,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:42:51,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:42:51,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:42:51,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:42:51,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:42:51,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:42:51,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:42:51,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:42:51,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:42:51,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:42:51,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:42:51,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:42:51,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:42:51,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:42:51,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:42:51,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:42:51,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:42:51,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:42:51,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:42:51,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:42:51,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:42:51,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:42:51,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:42:51,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:42:51,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:42:51,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:42:51,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:42:51,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:42:51,361 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 23:42:51,375 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:42:51,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:42:51,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:42:51,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:42:51,377 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:42:51,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:42:51,377 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:42:51,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:42:51,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:42:51,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:42:51,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:42:51,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:42:51,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:42:51,378 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:42:51,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:42:51,379 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:42:51,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:42:51,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:42:51,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:42:51,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:42:51,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:42:51,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:51,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:42:51,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:42:51,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:42:51,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:42:51,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:42:51,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:42:51,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:42:51,637 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:42:51,656 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:42:51,659 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:42:51,661 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:42:51,661 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:42:51,662 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep.i [2019-10-14 23:42:51,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/959fbbca3/dd08a98db1054a03b09d6d6e212233f1/FLAGba273161a [2019-10-14 23:42:52,156 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:42:52,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep.i [2019-10-14 23:42:52,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/959fbbca3/dd08a98db1054a03b09d6d6e212233f1/FLAGba273161a [2019-10-14 23:42:52,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/959fbbca3/dd08a98db1054a03b09d6d6e212233f1 [2019-10-14 23:42:52,585 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:42:52,586 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:42:52,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:52,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:42:52,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:42:52,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:52" (1/1) ... [2019-10-14 23:42:52,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e90e1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:52, skipping insertion in model container [2019-10-14 23:42:52,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:52" (1/1) ... [2019-10-14 23:42:52,602 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:42:52,620 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:42:52,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:52,897 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:42:52,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:52,941 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:42:52,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:52 WrapperNode [2019-10-14 23:42:52,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:52,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:42:52,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:42:52,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:42:53,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:52" (1/1) ... [2019-10-14 23:42:53,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:52" (1/1) ... [2019-10-14 23:42:53,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:52" (1/1) ... [2019-10-14 23:42:53,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:52" (1/1) ... [2019-10-14 23:42:53,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:52" (1/1) ... [2019-10-14 23:42:53,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:52" (1/1) ... [2019-10-14 23:42:53,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:52" (1/1) ... [2019-10-14 23:42:53,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:42:53,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:42:53,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:42:53,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:42:53,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:52" (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 23:42:53,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:42:53,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:42:53,187 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-14 23:42:53,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:42:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:42:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:42:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-14 23:42:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:42:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:42:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:42:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:42:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:42:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:42:53,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:42:53,511 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:42:53,511 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 23:42:53,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:53 BoogieIcfgContainer [2019-10-14 23:42:53,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:42:53,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:42:53,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:42:53,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:42:53,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:42:52" (1/3) ... [2019-10-14 23:42:53,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d351b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:53, skipping insertion in model container [2019-10-14 23:42:53,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:52" (2/3) ... [2019-10-14 23:42:53,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d351b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:53, skipping insertion in model container [2019-10-14 23:42:53,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:53" (3/3) ... [2019-10-14 23:42:53,521 INFO L109 eAbstractionObserver]: Analyzing ICFG sep.i [2019-10-14 23:42:53,530 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:42:53,537 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:42:53,546 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:42:53,568 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:42:53,568 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:42:53,568 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:42:53,569 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:42:53,569 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:42:53,569 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:42:53,569 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:42:53,569 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:42:53,585 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 23:42:53,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:53,590 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:53,591 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 23:42:53,593 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:53,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1691531413, now seen corresponding path program 1 times [2019-10-14 23:42:53,603 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:53,604 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102134496] [2019-10-14 23:42:53,604 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:53,604 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:53,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:53,899 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 23:42:53,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102134496] [2019-10-14 23:42:53,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59818764] [2019-10-14 23:42:53,901 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 23:42:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:54,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:54,089 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 23:42:54,090 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:54,090 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2019-10-14 23:42:54,091 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340331169] [2019-10-14 23:42:54,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:54,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:54,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:54,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:54,115 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2019-10-14 23:42:54,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:54,211 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2019-10-14 23:42:54,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:54,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-14 23:42:54,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:54,222 INFO L225 Difference]: With dead ends: 64 [2019-10-14 23:42:54,223 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:42:54,226 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 23:42:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:42:54,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-10-14 23:42:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:42:54,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 23:42:54,273 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-14 23:42:54,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:54,273 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 23:42:54,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:54,274 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 23:42:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 23:42:54,276 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:54,277 INFO L380 BasicCegarLoop]: trace histogram [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 23:42:54,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:54,487 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:54,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:54,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2111009974, now seen corresponding path program 1 times [2019-10-14 23:42:54,488 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:54,488 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432679745] [2019-10-14 23:42:54,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 23:42:54,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432679745] [2019-10-14 23:42:54,707 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:54,707 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:42:54,707 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834681481] [2019-10-14 23:42:54,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:42:54,709 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:42:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:54,710 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2019-10-14 23:42:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:54,864 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-10-14 23:42:54,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:54,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-10-14 23:42:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:54,866 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:42:54,866 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:42:54,868 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 23:42:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:42:54,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 23:42:54,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:42:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 23:42:54,883 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 41 [2019-10-14 23:42:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:54,889 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 23:42:54,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:42:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 23:42:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 23:42:54,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:54,894 INFO L380 BasicCegarLoop]: trace histogram [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 23:42:54,894 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:54,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1738733132, now seen corresponding path program 1 times [2019-10-14 23:42:54,896 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:54,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316944654] [2019-10-14 23:42:54,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:55,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316944654] [2019-10-14 23:42:55,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514416086] [2019-10-14 23:42:55,121 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 23:42:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:55,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:55,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-14 23:42:55,230 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:55,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2019-10-14 23:42:55,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545264302] [2019-10-14 23:42:55,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:55,234 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:55,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:55,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:55,234 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 9 states. [2019-10-14 23:42:55,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:55,468 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2019-10-14 23:42:55,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:55,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2019-10-14 23:42:55,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:55,469 INFO L225 Difference]: With dead ends: 53 [2019-10-14 23:42:55,470 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:42:55,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 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 23:42:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:42:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-10-14 23:42:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:42:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-10-14 23:42:55,491 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 43 [2019-10-14 23:42:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:55,492 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-10-14 23:42:55,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-10-14 23:42:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:42:55,498 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:55,498 INFO L380 BasicCegarLoop]: trace histogram [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 23:42:55,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:55,699 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:55,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1671851891, now seen corresponding path program 2 times [2019-10-14 23:42:55,700 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:55,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700809530] [2019-10-14 23:42:55,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:55,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:55,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 23:42:56,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700809530] [2019-10-14 23:42:56,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088774335] [2019-10-14 23:42:56,463 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 23:42:56,530 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:56,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:56,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-14 23:42:56,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:56,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:42:56,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:42:56,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:42:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:56,833 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:56,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2019-10-14 23:42:56,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765369761] [2019-10-14 23:42:56,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:42:56,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:56,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:42:56,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:56,837 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 16 states. [2019-10-14 23:42:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:57,326 INFO L93 Difference]: Finished difference Result 77 states and 105 transitions. [2019-10-14 23:42:57,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:42:57,327 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2019-10-14 23:42:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:57,333 INFO L225 Difference]: With dead ends: 77 [2019-10-14 23:42:57,333 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 23:42:57,336 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:42:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 23:42:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2019-10-14 23:42:57,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 23:42:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2019-10-14 23:42:57,382 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 52 [2019-10-14 23:42:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:57,385 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2019-10-14 23:42:57,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:42:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2019-10-14 23:42:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:42:57,388 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:57,388 INFO L380 BasicCegarLoop]: trace histogram [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 23:42:57,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:57,596 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:57,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1943057035, now seen corresponding path program 1 times [2019-10-14 23:42:57,597 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:57,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730762776] [2019-10-14 23:42:57,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 23:42:58,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730762776] [2019-10-14 23:42:58,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374772772] [2019-10-14 23:42:58,343 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-14 23:42:58,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:58,624 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:42:58,629 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 23:42:58,630 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:42:58,662 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:42:58,663 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 23:42:58,663 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:7 [2019-10-14 23:42:58,776 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-10-14 23:42:58,776 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:42:58,783 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:42:58,784 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:42:58,784 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:14 [2019-10-14 23:42:58,794 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 23:42:58,794 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:42:58,810 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:42:58,811 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 23:42:58,811 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2019-10-14 23:42:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:42:59,115 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:59,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 30 [2019-10-14 23:42:59,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302773326] [2019-10-14 23:42:59,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:42:59,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:59,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:42:59,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:42:59,118 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand 30 states. [2019-10-14 23:43:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:03,306 INFO L93 Difference]: Finished difference Result 300 states and 434 transitions. [2019-10-14 23:43:03,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-10-14 23:43:03,307 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 52 [2019-10-14 23:43:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:03,311 INFO L225 Difference]: With dead ends: 300 [2019-10-14 23:43:03,311 INFO L226 Difference]: Without dead ends: 265 [2019-10-14 23:43:03,315 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=923, Invalid=5239, Unknown=0, NotChecked=0, Total=6162 [2019-10-14 23:43:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-10-14 23:43:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 204. [2019-10-14 23:43:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-10-14 23:43:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 303 transitions. [2019-10-14 23:43:03,366 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 303 transitions. Word has length 52 [2019-10-14 23:43:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:03,366 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 303 transitions. [2019-10-14 23:43:03,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:43:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 303 transitions. [2019-10-14 23:43:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:43:03,371 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:03,372 INFO L380 BasicCegarLoop]: trace histogram [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 23:43:03,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:03,577 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:03,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1733891505, now seen corresponding path program 2 times [2019-10-14 23:43:03,578 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:03,578 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124900840] [2019-10-14 23:43:03,578 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:03,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:03,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,011 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2019-10-14 23:43:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:43:04,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124900840] [2019-10-14 23:43:04,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815627559] [2019-10-14 23:43:04,292 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:04,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:04,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:04,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 23:43:04,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:04,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:04,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:04,566 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:04,569 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 23:43:04,573 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:04,573 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 36 [2019-10-14 23:43:04,576 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:04,599 INFO L567 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2019-10-14 23:43:04,600 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 23:43:04,600 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:15 [2019-10-14 23:43:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:43:04,976 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:04,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2019-10-14 23:43:04,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875912651] [2019-10-14 23:43:04,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:43:04,979 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:04,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:43:04,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:04,980 INFO L87 Difference]: Start difference. First operand 204 states and 303 transitions. Second operand 27 states. [2019-10-14 23:43:08,907 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 44 [2019-10-14 23:43:09,602 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2019-10-14 23:43:10,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:10,095 INFO L93 Difference]: Finished difference Result 695 states and 1005 transitions. [2019-10-14 23:43:10,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-14 23:43:10,097 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2019-10-14 23:43:10,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:10,102 INFO L225 Difference]: With dead ends: 695 [2019-10-14 23:43:10,102 INFO L226 Difference]: Without dead ends: 466 [2019-10-14 23:43:10,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=704, Invalid=5148, Unknown=0, NotChecked=0, Total=5852 [2019-10-14 23:43:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2019-10-14 23:43:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 348. [2019-10-14 23:43:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2019-10-14 23:43:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 496 transitions. [2019-10-14 23:43:10,165 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 496 transitions. Word has length 52 [2019-10-14 23:43:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:10,166 INFO L462 AbstractCegarLoop]: Abstraction has 348 states and 496 transitions. [2019-10-14 23:43:10,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:43:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 496 transitions. [2019-10-14 23:43:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:43:10,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:10,169 INFO L380 BasicCegarLoop]: trace histogram [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 23:43:10,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:10,374 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:10,375 INFO L82 PathProgramCache]: Analyzing trace with hash -173515275, now seen corresponding path program 3 times [2019-10-14 23:43:10,375 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:10,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312685599] [2019-10-14 23:43:10,376 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:10,376 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:10,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 23:43:10,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312685599] [2019-10-14 23:43:10,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745436765] [2019-10-14 23:43:10,822 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:10,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 23:43:10,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:10,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-14 23:43:10,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:11,152 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:11,159 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 41 treesize of output 29 [2019-10-14 23:43:11,160 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:11,164 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:11,169 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 43 treesize of output 31 [2019-10-14 23:43:11,169 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:11,191 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:11,192 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-14 23:43:11,192 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:85, output treesize:37 [2019-10-14 23:43:11,331 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:11,339 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2019-10-14 23:43:11,340 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:11,343 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2019-10-14 23:43:11,344 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:11,357 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:11,358 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-14 23:43:11,358 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:29 [2019-10-14 23:43:11,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:11,420 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2019-10-14 23:43:11,420 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:11,427 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2019-10-14 23:43:11,427 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:11,450 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:11,451 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-14 23:43:11,451 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:47 [2019-10-14 23:43:11,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:11,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:11,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:11,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:11,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:11,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:11,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:11,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:11,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:43:12,109 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:12,110 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 32 [2019-10-14 23:43:12,112 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255401018] [2019-10-14 23:43:12,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 23:43:12,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:12,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 23:43:12,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:43:12,115 INFO L87 Difference]: Start difference. First operand 348 states and 496 transitions. Second operand 32 states. [2019-10-14 23:43:15,499 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2019-10-14 23:43:15,667 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2019-10-14 23:43:15,935 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2019-10-14 23:43:16,224 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2019-10-14 23:43:16,388 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2019-10-14 23:43:16,686 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 63 [2019-10-14 23:43:16,864 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 61 [2019-10-14 23:43:17,001 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2019-10-14 23:43:17,286 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 69 [2019-10-14 23:43:17,443 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2019-10-14 23:43:17,650 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 66 [2019-10-14 23:43:17,814 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2019-10-14 23:43:18,180 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 74 [2019-10-14 23:43:18,382 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2019-10-14 23:43:19,053 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2019-10-14 23:43:19,696 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2019-10-14 23:43:20,115 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2019-10-14 23:43:20,452 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2019-10-14 23:43:21,106 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2019-10-14 23:43:21,659 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 75 [2019-10-14 23:43:21,803 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2019-10-14 23:43:22,216 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 79 [2019-10-14 23:43:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:23,925 INFO L93 Difference]: Finished difference Result 1123 states and 1540 transitions. [2019-10-14 23:43:23,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-10-14 23:43:23,928 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 52 [2019-10-14 23:43:23,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:23,934 INFO L225 Difference]: With dead ends: 1123 [2019-10-14 23:43:23,935 INFO L226 Difference]: Without dead ends: 967 [2019-10-14 23:43:23,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4307 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1667, Invalid=11443, Unknown=0, NotChecked=0, Total=13110 [2019-10-14 23:43:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2019-10-14 23:43:24,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 698. [2019-10-14 23:43:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2019-10-14 23:43:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 966 transitions. [2019-10-14 23:43:24,031 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 966 transitions. Word has length 52 [2019-10-14 23:43:24,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:24,031 INFO L462 AbstractCegarLoop]: Abstraction has 698 states and 966 transitions. [2019-10-14 23:43:24,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 23:43:24,031 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 966 transitions. [2019-10-14 23:43:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:43:24,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:24,034 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 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 23:43:24,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:24,242 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:24,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:24,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1892746489, now seen corresponding path program 4 times [2019-10-14 23:43:24,242 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:24,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828204689] [2019-10-14 23:43:24,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:24,243 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:24,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 23:43:24,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828204689] [2019-10-14 23:43:24,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804174944] [2019-10-14 23:43:24,579 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:24,665 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:24,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:24,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-14 23:43:24,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:24,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:24,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:24,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:43:24,839 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:24,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-10-14 23:43:24,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37667621] [2019-10-14 23:43:24,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:43:24,840 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:24,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:43:24,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:24,841 INFO L87 Difference]: Start difference. First operand 698 states and 966 transitions. Second operand 15 states. [2019-10-14 23:43:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:25,322 INFO L93 Difference]: Finished difference Result 1156 states and 1751 transitions. [2019-10-14 23:43:25,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:43:25,323 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2019-10-14 23:43:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:25,331 INFO L225 Difference]: With dead ends: 1156 [2019-10-14 23:43:25,331 INFO L226 Difference]: Without dead ends: 1152 [2019-10-14 23:43:25,333 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 13 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:25,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2019-10-14 23:43:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 890. [2019-10-14 23:43:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-10-14 23:43:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1298 transitions. [2019-10-14 23:43:25,454 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1298 transitions. Word has length 52 [2019-10-14 23:43:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:25,456 INFO L462 AbstractCegarLoop]: Abstraction has 890 states and 1298 transitions. [2019-10-14 23:43:25,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:43:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1298 transitions. [2019-10-14 23:43:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:43:25,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:25,463 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 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 23:43:25,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:25,668 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:25,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2144055369, now seen corresponding path program 5 times [2019-10-14 23:43:25,668 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:25,668 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194617861] [2019-10-14 23:43:25,668 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:25,669 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:25,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,139 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2019-10-14 23:43:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:43:26,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194617861] [2019-10-14 23:43:26,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839086220] [2019-10-14 23:43:26,482 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:26,582 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 23:43:26,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:26,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-14 23:43:26,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:26,793 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:26,796 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:26,796 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 22 [2019-10-14 23:43:26,797 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:26,806 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:26,806 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:26,807 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:15 [2019-10-14 23:43:27,057 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:27,058 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 29 treesize of output 22 [2019-10-14 23:43:27,058 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:27,066 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:27,066 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:27,066 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2019-10-14 23:43:27,118 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:27,119 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:27,130 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:27,131 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 69 [2019-10-14 23:43:27,131 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:27,158 INFO L567 ElimStorePlain]: treesize reduction 21, result has 71.2 percent of original size [2019-10-14 23:43:27,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:27,160 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:27,160 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:13 [2019-10-14 23:43:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 5 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:43:27,395 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:27,395 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2019-10-14 23:43:27,395 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591874138] [2019-10-14 23:43:27,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:43:27,399 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:27,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:43:27,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:43:27,402 INFO L87 Difference]: Start difference. First operand 890 states and 1298 transitions. Second operand 34 states. [2019-10-14 23:43:30,434 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2019-10-14 23:43:31,018 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 40