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/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:43:36,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:43:36,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:43:36,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:43:36,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:43:36,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:43:36,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:43:36,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:43:36,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:43:36,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:43:36,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:43:36,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:43:36,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:43:36,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:43:36,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:43:36,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:43:36,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:43:36,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:43:36,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:43:36,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:43:36,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:43:36,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:43:36,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:43:36,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:43:36,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:43:36,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:43:36,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:43:36,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:43:36,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:43:36,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:43:36,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:43:36,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:43:36,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:43:36,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:43:36,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:43:36,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:43:36,331 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 [2019-10-13 17:43:36,348 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:43:36,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:43:36,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:43:36,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:43:36,350 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:43:36,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:43:36,350 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:43:36,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:43:36,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:43:36,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:43:36,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:43:36,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:43:36,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:43:36,353 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:43:36,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:43:36,353 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:43:36,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:43:36,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:43:36,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:43:36,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:43:36,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:43:36,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:43:36,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:43:36,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:43:36,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:43:36,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:43:36,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:43:36,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:43:36,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:43:36,635 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:43:36,648 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:43:36,651 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:43:36,652 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:43:36,653 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:43:36,653 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2019-10-13 17:43:36,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8acfe92/af9a201dd4d04b858b0c6fd9d06ec261/FLAG09ff6417b [2019-10-13 17:43:37,145 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:43:37,146 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2019-10-13 17:43:37,152 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8acfe92/af9a201dd4d04b858b0c6fd9d06ec261/FLAG09ff6417b [2019-10-13 17:43:37,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8acfe92/af9a201dd4d04b858b0c6fd9d06ec261 [2019-10-13 17:43:37,529 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:43:37,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:43:37,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:43:37,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:43:37,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:43:37,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c44ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37, skipping insertion in model container [2019-10-13 17:43:37,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,551 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:43:37,570 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:43:37,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:43:37,780 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:43:37,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:43:37,826 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:43:37,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37 WrapperNode [2019-10-13 17:43:37,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:43:37,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:43:37,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:43:37,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:43:37,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:43:37,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:43:37,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:43:37,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:43:37,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (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 [2019-10-13 17:43:38,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:43:38,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:43:38,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:43:38,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:43:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:43:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:43:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:43:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:43:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:43:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:43:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:43:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:43:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:43:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:43:38,334 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:43:38,334 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-13 17:43:38,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:43:38 BoogieIcfgContainer [2019-10-13 17:43:38,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:43:38,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:43:38,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:43:38,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:43:38,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:43:37" (1/3) ... [2019-10-13 17:43:38,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b2ce87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:43:38, skipping insertion in model container [2019-10-13 17:43:38,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (2/3) ... [2019-10-13 17:43:38,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b2ce87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:43:38, skipping insertion in model container [2019-10-13 17:43:38,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:43:38" (3/3) ... [2019-10-13 17:43:38,351 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2019-10-13 17:43:38,362 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:43:38,368 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:43:38,379 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:43:38,403 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:43:38,403 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:43:38,403 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:43:38,403 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:43:38,404 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:43:38,404 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:43:38,404 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:43:38,404 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:43:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-10-13 17:43:38,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:43:38,427 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:38,428 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:38,429 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:38,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2019-10-13 17:43:38,440 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:38,440 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569185370] [2019-10-13 17:43:38,440 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,440 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:38,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569185370] [2019-10-13 17:43:38,595 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:38,595 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:43:38,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859871205] [2019-10-13 17:43:38,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:43:38,600 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:38,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:43:38,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:43:38,615 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-10-13 17:43:38,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:38,795 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2019-10-13 17:43:38,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:43:38,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-13 17:43:38,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:38,808 INFO L225 Difference]: With dead ends: 82 [2019-10-13 17:43:38,809 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 17:43:38,817 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:43:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 17:43:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-13 17:43:38,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 17:43:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2019-10-13 17:43:38,864 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2019-10-13 17:43:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:38,864 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2019-10-13 17:43:38,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:43:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2019-10-13 17:43:38,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:43:38,866 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:38,866 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:38,867 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:38,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:38,867 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2019-10-13 17:43:38,868 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:38,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599099843] [2019-10-13 17:43:38,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:38,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599099843] [2019-10-13 17:43:38,931 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:38,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:43:38,932 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303470820] [2019-10-13 17:43:38,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:38,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:38,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:38,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:38,935 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2019-10-13 17:43:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:39,097 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2019-10-13 17:43:39,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:39,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-13 17:43:39,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:39,100 INFO L225 Difference]: With dead ends: 74 [2019-10-13 17:43:39,100 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 17:43:39,101 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 17:43:39,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-13 17:43:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 17:43:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2019-10-13 17:43:39,112 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2019-10-13 17:43:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:39,113 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2019-10-13 17:43:39,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2019-10-13 17:43:39,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 17:43:39,114 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:39,114 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:39,115 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1609541534, now seen corresponding path program 1 times [2019-10-13 17:43:39,115 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:39,116 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396190749] [2019-10-13 17:43:39,116 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,116 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:39,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396190749] [2019-10-13 17:43:39,200 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:39,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:43:39,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008973867] [2019-10-13 17:43:39,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:39,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:39,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:39,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:39,203 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 4 states. [2019-10-13 17:43:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:39,352 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2019-10-13 17:43:39,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:39,352 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-13 17:43:39,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:39,354 INFO L225 Difference]: With dead ends: 72 [2019-10-13 17:43:39,354 INFO L226 Difference]: Without dead ends: 59 [2019-10-13 17:43:39,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-13 17:43:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2019-10-13 17:43:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 17:43:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-10-13 17:43:39,378 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2019-10-13 17:43:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:39,379 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-10-13 17:43:39,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-10-13 17:43:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:43:39,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:39,380 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:39,380 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:39,381 INFO L82 PathProgramCache]: Analyzing trace with hash -898844059, now seen corresponding path program 1 times [2019-10-13 17:43:39,381 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:39,381 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984839996] [2019-10-13 17:43:39,381 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,381 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:39,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984839996] [2019-10-13 17:43:39,456 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:39,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:43:39,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518456936] [2019-10-13 17:43:39,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:39,458 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:39,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:39,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:39,458 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2019-10-13 17:43:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:39,591 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2019-10-13 17:43:39,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:39,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-13 17:43:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:39,593 INFO L225 Difference]: With dead ends: 90 [2019-10-13 17:43:39,593 INFO L226 Difference]: Without dead ends: 59 [2019-10-13 17:43:39,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:39,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-13 17:43:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2019-10-13 17:43:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-13 17:43:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2019-10-13 17:43:39,602 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 20 [2019-10-13 17:43:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:39,602 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2019-10-13 17:43:39,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2019-10-13 17:43:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:43:39,604 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:39,604 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:39,605 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:39,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:39,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1708190685, now seen corresponding path program 1 times [2019-10-13 17:43:39,605 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:39,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065089833] [2019-10-13 17:43:39,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:39,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065089833] [2019-10-13 17:43:39,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896524899] [2019-10-13 17:43:39,691 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 [2019-10-13 17:43:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:43:39,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:39,795 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:39,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:43:39,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329325046] [2019-10-13 17:43:39,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:43:39,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:39,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:43:39,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:43:39,798 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 6 states. [2019-10-13 17:43:39,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:39,910 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2019-10-13 17:43:39,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:43:39,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-13 17:43:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:39,912 INFO L225 Difference]: With dead ends: 86 [2019-10-13 17:43:39,912 INFO L226 Difference]: Without dead ends: 49 [2019-10-13 17:43:39,914 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:43:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-13 17:43:39,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-10-13 17:43:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-13 17:43:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2019-10-13 17:43:39,925 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 20 [2019-10-13 17:43:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:39,925 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2019-10-13 17:43:39,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:43:39,925 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2019-10-13 17:43:39,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:43:39,927 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:39,927 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:40,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:40,132 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:40,134 INFO L82 PathProgramCache]: Analyzing trace with hash 700215557, now seen corresponding path program 2 times [2019-10-13 17:43:40,134 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:40,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270139989] [2019-10-13 17:43:40,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:40,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270139989] [2019-10-13 17:43:40,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510402148] [2019-10-13 17:43:40,231 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 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 [2019-10-13 17:43:40,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 17:43:40,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:40,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:43:40,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:43:40,292 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:43:40,293 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-10-13 17:43:40,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676278844] [2019-10-13 17:43:40,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:40,294 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:40,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:40,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:43:40,294 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand 4 states. [2019-10-13 17:43:40,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:40,364 INFO L93 Difference]: Finished difference Result 108 states and 145 transitions. [2019-10-13 17:43:40,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:40,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-13 17:43:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:40,366 INFO L225 Difference]: With dead ends: 108 [2019-10-13 17:43:40,366 INFO L226 Difference]: Without dead ends: 73 [2019-10-13 17:43:40,367 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:40,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-13 17:43:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2019-10-13 17:43:40,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:43:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2019-10-13 17:43:40,374 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 22 [2019-10-13 17:43:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:40,374 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2019-10-13 17:43:40,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2019-10-13 17:43:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 17:43:40,375 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:40,375 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:40,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:40,577 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:40,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:40,578 INFO L82 PathProgramCache]: Analyzing trace with hash -159559916, now seen corresponding path program 1 times [2019-10-13 17:43:40,579 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:40,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241988088] [2019-10-13 17:43:40,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:40,661 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241988088] [2019-10-13 17:43:40,661 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210363956] [2019-10-13 17:43:40,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -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 [2019-10-13 17:43:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:43:40,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:40,724 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:40,724 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:43:40,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239134398] [2019-10-13 17:43:40,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:43:40,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:40,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:43:40,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:43:40,728 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 7 states. [2019-10-13 17:43:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:40,831 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2019-10-13 17:43:40,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:43:40,831 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-10-13 17:43:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:40,832 INFO L225 Difference]: With dead ends: 90 [2019-10-13 17:43:40,833 INFO L226 Difference]: Without dead ends: 52 [2019-10-13 17:43:40,834 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:43:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-13 17:43:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-13 17:43:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 17:43:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-10-13 17:43:40,840 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 25 [2019-10-13 17:43:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:40,841 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-10-13 17:43:40,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:43:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-10-13 17:43:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 17:43:40,842 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:40,842 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:41,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:41,054 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:41,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:41,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1768902798, now seen corresponding path program 2 times [2019-10-13 17:43:41,055 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:41,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442553505] [2019-10-13 17:43:41,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:41,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442553505] [2019-10-13 17:43:41,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421457457] [2019-10-13 17:43:41,140 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 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 [2019-10-13 17:43:41,198 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 17:43:41,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:41,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:43:41,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 17:43:41,232 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:43:41,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2019-10-13 17:43:41,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070045485] [2019-10-13 17:43:41,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:41,233 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:41,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:41,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:41,234 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 4 states. [2019-10-13 17:43:41,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:41,288 INFO L93 Difference]: Finished difference Result 102 states and 135 transitions. [2019-10-13 17:43:41,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:41,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-13 17:43:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:41,289 INFO L225 Difference]: With dead ends: 102 [2019-10-13 17:43:41,290 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 17:43:41,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 17:43:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2019-10-13 17:43:41,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:43:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2019-10-13 17:43:41,301 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 27 [2019-10-13 17:43:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:41,301 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2019-10-13 17:43:41,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2019-10-13 17:43:41,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 17:43:41,303 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:41,303 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:41,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:41,512 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:41,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:41,513 INFO L82 PathProgramCache]: Analyzing trace with hash -485006498, now seen corresponding path program 1 times [2019-10-13 17:43:41,513 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:41,514 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162111504] [2019-10-13 17:43:41,514 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,514 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:41,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162111504] [2019-10-13 17:43:41,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154450640] [2019-10-13 17:43:41,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -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 [2019-10-13 17:43:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:43:41,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:41,633 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:41,633 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-13 17:43:41,633 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304128300] [2019-10-13 17:43:41,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:43:41,634 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:41,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:43:41,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:43:41,635 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand 8 states. [2019-10-13 17:43:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:41,731 INFO L93 Difference]: Finished difference Result 112 states and 148 transitions. [2019-10-13 17:43:41,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:43:41,732 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-10-13 17:43:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:41,732 INFO L225 Difference]: With dead ends: 112 [2019-10-13 17:43:41,733 INFO L226 Difference]: Without dead ends: 64 [2019-10-13 17:43:41,733 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:43:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-13 17:43:41,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-10-13 17:43:41,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-13 17:43:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2019-10-13 17:43:41,747 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 28 [2019-10-13 17:43:41,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:41,748 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2019-10-13 17:43:41,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:43:41,748 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2019-10-13 17:43:41,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 17:43:41,749 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:41,749 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:41,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:41,954 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:41,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:41,955 INFO L82 PathProgramCache]: Analyzing trace with hash 301121088, now seen corresponding path program 2 times [2019-10-13 17:43:41,956 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:41,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65388160] [2019-10-13 17:43:41,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:42,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65388160] [2019-10-13 17:43:42,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972831269] [2019-10-13 17:43:42,028 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 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 [2019-10-13 17:43:42,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 17:43:42,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:42,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:43:42,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:42,190 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:42,190 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 59 [2019-10-13 17:43:42,191 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:42,203 INFO L567 ElimStorePlain]: treesize reduction 24, result has 42.9 percent of original size [2019-10-13 17:43:42,204 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:43:42,204 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:7 [2019-10-13 17:43:42,224 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 15 treesize of output 7 [2019-10-13 17:43:42,225 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:43:42,227 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:43:42,228 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:43:42,228 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 17:43:42,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 17:43:42,270 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:43:42,270 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2019-10-13 17:43:42,270 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348262270] [2019-10-13 17:43:42,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:43:42,271 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:42,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:43:42,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:42,271 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand 8 states. [2019-10-13 17:43:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:42,384 INFO L93 Difference]: Finished difference Result 112 states and 146 transitions. [2019-10-13 17:43:42,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:43:42,385 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-10-13 17:43:42,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:42,386 INFO L225 Difference]: With dead ends: 112 [2019-10-13 17:43:42,386 INFO L226 Difference]: Without dead ends: 77 [2019-10-13 17:43:42,387 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:43:42,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-13 17:43:42,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2019-10-13 17:43:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-13 17:43:42,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2019-10-13 17:43:42,394 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 30 [2019-10-13 17:43:42,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:42,395 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2019-10-13 17:43:42,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:43:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2019-10-13 17:43:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 17:43:42,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:42,396 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:42,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:42,605 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:42,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:42,606 INFO L82 PathProgramCache]: Analyzing trace with hash 210042451, now seen corresponding path program 1 times [2019-10-13 17:43:42,606 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:42,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059094072] [2019-10-13 17:43:42,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:42,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:42,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:43:42,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059094072] [2019-10-13 17:43:42,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000589073] [2019-10-13 17:43:42,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -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 [2019-10-13 17:43:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:43:42,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:43:42,773 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:42,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:43:42,773 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872795256] [2019-10-13 17:43:42,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:43:42,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:42,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:43:42,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:42,774 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand 9 states. [2019-10-13 17:43:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:42,885 INFO L93 Difference]: Finished difference Result 128 states and 164 transitions. [2019-10-13 17:43:42,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:43:42,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-10-13 17:43:42,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:42,888 INFO L225 Difference]: With dead ends: 128 [2019-10-13 17:43:42,888 INFO L226 Difference]: Without dead ends: 73 [2019-10-13 17:43:42,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-13 17:43:42,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-13 17:43:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-13 17:43:42,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2019-10-13 17:43:42,896 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 38 [2019-10-13 17:43:42,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:42,896 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2019-10-13 17:43:42,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:43:42,896 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2019-10-13 17:43:42,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 17:43:42,898 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:42,898 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:43,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:43,109 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:43,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2120066741, now seen corresponding path program 2 times [2019-10-13 17:43:43,110 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:43,110 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381020470] [2019-10-13 17:43:43,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:43:43,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381020470] [2019-10-13 17:43:43,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505195598] [2019-10-13 17:43:43,195 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 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 [2019-10-13 17:43:43,236 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:43,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:43,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:43:43,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:43:43,255 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:43,255 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-13 17:43:43,255 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716992213] [2019-10-13 17:43:43,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:43:43,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:43,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:43:43,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:43:43,256 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand 10 states. [2019-10-13 17:43:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:43,364 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2019-10-13 17:43:43,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:43:43,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-10-13 17:43:43,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:43,366 INFO L225 Difference]: With dead ends: 130 [2019-10-13 17:43:43,366 INFO L226 Difference]: Without dead ends: 75 [2019-10-13 17:43:43,367 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:43:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-13 17:43:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-10-13 17:43:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-13 17:43:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2019-10-13 17:43:43,374 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 40 [2019-10-13 17:43:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:43,374 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2019-10-13 17:43:43,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:43:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2019-10-13 17:43:43,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 17:43:43,375 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:43,375 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:43,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:43,585 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:43,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:43,586 INFO L82 PathProgramCache]: Analyzing trace with hash -592593257, now seen corresponding path program 3 times [2019-10-13 17:43:43,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:43,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029024471] [2019-10-13 17:43:43,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:43:43,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029024471] [2019-10-13 17:43:43,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410717572] [2019-10-13 17:43:43,701 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:43,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:43:43,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:43,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:43:43,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 17:43:43,807 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:43,808 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-10-13 17:43:43,808 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487987211] [2019-10-13 17:43:43,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:43:43,809 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:43,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:43:43,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:43,809 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand 13 states. [2019-10-13 17:43:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:44,140 INFO L93 Difference]: Finished difference Result 146 states and 189 transitions. [2019-10-13 17:43:44,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:43:44,140 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2019-10-13 17:43:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:44,141 INFO L225 Difference]: With dead ends: 146 [2019-10-13 17:43:44,141 INFO L226 Difference]: Without dead ends: 91 [2019-10-13 17:43:44,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:43:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-13 17:43:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2019-10-13 17:43:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-13 17:43:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2019-10-13 17:43:44,148 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 42 [2019-10-13 17:43:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:44,148 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2019-10-13 17:43:44,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:43:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2019-10-13 17:43:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 17:43:44,149 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:44,150 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:44,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:44,354 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:44,354 INFO L82 PathProgramCache]: Analyzing trace with hash 776355378, now seen corresponding path program 4 times [2019-10-13 17:43:44,355 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:44,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707603127] [2019-10-13 17:43:44,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:44,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:44,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:43:44,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707603127] [2019-10-13 17:43:44,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672468540] [2019-10-13 17:43:44,470 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:44,520 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:44,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:44,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:43:44,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:43:44,536 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:44,536 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:43:44,536 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430706164] [2019-10-13 17:43:44,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:43:44,537 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:44,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:43:44,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:43:44,537 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 12 states. [2019-10-13 17:43:44,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:44,668 INFO L93 Difference]: Finished difference Result 144 states and 182 transitions. [2019-10-13 17:43:44,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:43:44,669 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2019-10-13 17:43:44,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:44,670 INFO L225 Difference]: With dead ends: 144 [2019-10-13 17:43:44,670 INFO L226 Difference]: Without dead ends: 84 [2019-10-13 17:43:44,671 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:43:44,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-13 17:43:44,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2019-10-13 17:43:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-13 17:43:44,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2019-10-13 17:43:44,676 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 47 [2019-10-13 17:43:44,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:44,676 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2019-10-13 17:43:44,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:43:44,677 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2019-10-13 17:43:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 17:43:44,677 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:44,677 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:44,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:44,882 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash 96986128, now seen corresponding path program 5 times [2019-10-13 17:43:44,883 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:44,884 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449445078] [2019-10-13 17:43:44,884 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:44,884 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:44,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:43:45,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449445078] [2019-10-13 17:43:45,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68099093] [2019-10-13 17:43:45,036 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:45,117 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-10-13 17:43:45,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:45,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:45,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:43:45,137 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:45,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:43:45,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639459487] [2019-10-13 17:43:45,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:43:45,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:45,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:43:45,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:45,138 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 13 states. [2019-10-13 17:43:45,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:45,256 INFO L93 Difference]: Finished difference Result 146 states and 184 transitions. [2019-10-13 17:43:45,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:43:45,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2019-10-13 17:43:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:45,258 INFO L225 Difference]: With dead ends: 146 [2019-10-13 17:43:45,258 INFO L226 Difference]: Without dead ends: 86 [2019-10-13 17:43:45,259 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:45,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-13 17:43:45,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-10-13 17:43:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-13 17:43:45,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2019-10-13 17:43:45,265 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 49 [2019-10-13 17:43:45,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:45,265 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2019-10-13 17:43:45,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:43:45,266 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2019-10-13 17:43:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-13 17:43:45,267 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:45,267 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:45,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:45,477 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:45,478 INFO L82 PathProgramCache]: Analyzing trace with hash 58165870, now seen corresponding path program 6 times [2019-10-13 17:43:45,478 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:45,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014185822] [2019-10-13 17:43:45,478 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:45,478 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:45,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:43:45,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014185822] [2019-10-13 17:43:45,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707169547] [2019-10-13 17:43:45,616 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:45,667 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-13 17:43:45,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:45,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:43:45,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-10-13 17:43:45,735 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:45,735 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-10-13 17:43:45,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2834783] [2019-10-13 17:43:45,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:43:45,736 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:45,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:43:45,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:43:45,737 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand 17 states. [2019-10-13 17:43:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:46,135 INFO L93 Difference]: Finished difference Result 163 states and 209 transitions. [2019-10-13 17:43:46,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:43:46,135 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2019-10-13 17:43:46,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:46,137 INFO L225 Difference]: With dead ends: 163 [2019-10-13 17:43:46,137 INFO L226 Difference]: Without dead ends: 103 [2019-10-13 17:43:46,138 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:43:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-13 17:43:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2019-10-13 17:43:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-13 17:43:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2019-10-13 17:43:46,144 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 51 [2019-10-13 17:43:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:46,145 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2019-10-13 17:43:46,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:43:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2019-10-13 17:43:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:43:46,145 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:46,146 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:46,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:46,350 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:46,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1263037951, now seen corresponding path program 7 times [2019-10-13 17:43:46,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:46,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697707184] [2019-10-13 17:43:46,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:46,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:46,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:43:46,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697707184] [2019-10-13 17:43:46,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732523385] [2019-10-13 17:43:46,483 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:46,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:43:46,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:43:46,570 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:46,571 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-13 17:43:46,571 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756402278] [2019-10-13 17:43:46,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:43:46,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:46,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:43:46,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:43:46,572 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 15 states. [2019-10-13 17:43:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:46,715 INFO L93 Difference]: Finished difference Result 162 states and 204 transitions. [2019-10-13 17:43:46,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:43:46,715 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2019-10-13 17:43:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:46,716 INFO L225 Difference]: With dead ends: 162 [2019-10-13 17:43:46,717 INFO L226 Difference]: Without dead ends: 96 [2019-10-13 17:43:46,717 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:43:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-13 17:43:46,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-10-13 17:43:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-13 17:43:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2019-10-13 17:43:46,723 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 56 [2019-10-13 17:43:46,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:46,724 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2019-10-13 17:43:46,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:43:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2019-10-13 17:43:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 17:43:46,737 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:46,737 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:46,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:46,942 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:46,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:46,943 INFO L82 PathProgramCache]: Analyzing trace with hash -2105507359, now seen corresponding path program 8 times [2019-10-13 17:43:46,943 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:46,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285525826] [2019-10-13 17:43:46,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:46,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:46,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:43:47,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285525826] [2019-10-13 17:43:47,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005740525] [2019-10-13 17:43:47,080 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:47,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:47,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:47,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:43:47,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:43:47,170 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:47,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-13 17:43:47,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507529991] [2019-10-13 17:43:47,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:43:47,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:47,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:43:47,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:43:47,172 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 16 states. [2019-10-13 17:43:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:47,286 INFO L93 Difference]: Finished difference Result 164 states and 206 transitions. [2019-10-13 17:43:47,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:43:47,286 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2019-10-13 17:43:47,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:47,287 INFO L225 Difference]: With dead ends: 164 [2019-10-13 17:43:47,288 INFO L226 Difference]: Without dead ends: 98 [2019-10-13 17:43:47,288 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:43:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-13 17:43:47,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-13 17:43:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-13 17:43:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2019-10-13 17:43:47,294 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 58 [2019-10-13 17:43:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:47,294 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2019-10-13 17:43:47,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:43:47,295 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2019-10-13 17:43:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 17:43:47,295 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:47,295 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:47,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:47,500 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:47,501 INFO L82 PathProgramCache]: Analyzing trace with hash -872209085, now seen corresponding path program 9 times [2019-10-13 17:43:47,501 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:47,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452163674] [2019-10-13 17:43:47,501 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:47,502 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:47,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:43:47,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452163674] [2019-10-13 17:43:47,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311069835] [2019-10-13 17:43:47,694 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:47,755 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 17:43:47,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:47,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:43:47,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-13 17:43:47,833 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:47,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 21 [2019-10-13 17:43:47,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764649973] [2019-10-13 17:43:47,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:43:47,834 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:47,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:43:47,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:43:47,836 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand 21 states. [2019-10-13 17:43:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:48,358 INFO L93 Difference]: Finished difference Result 181 states and 231 transitions. [2019-10-13 17:43:48,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:43:48,359 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2019-10-13 17:43:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:48,360 INFO L225 Difference]: With dead ends: 181 [2019-10-13 17:43:48,360 INFO L226 Difference]: Without dead ends: 115 [2019-10-13 17:43:48,362 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=1047, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 17:43:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-13 17:43:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2019-10-13 17:43:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-13 17:43:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2019-10-13 17:43:48,370 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 60 [2019-10-13 17:43:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:48,370 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2019-10-13 17:43:48,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:43:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2019-10-13 17:43:48,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-13 17:43:48,371 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:48,371 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:48,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:48,583 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:48,584 INFO L82 PathProgramCache]: Analyzing trace with hash 26602630, now seen corresponding path program 10 times [2019-10-13 17:43:48,584 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:48,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191257165] [2019-10-13 17:43:48,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:48,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:48,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:43:48,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191257165] [2019-10-13 17:43:48,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941113138] [2019-10-13 17:43:48,733 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:48,788 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:48,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:48,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:43:48,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 17:43:48,813 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:48,813 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:43:48,813 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753933627] [2019-10-13 17:43:48,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:43:48,814 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:48,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:43:48,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:48,815 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 18 states. [2019-10-13 17:43:48,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:48,961 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2019-10-13 17:43:48,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:43:48,962 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2019-10-13 17:43:48,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:48,963 INFO L225 Difference]: With dead ends: 180 [2019-10-13 17:43:48,963 INFO L226 Difference]: Without dead ends: 108 [2019-10-13 17:43:48,964 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-13 17:43:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-10-13 17:43:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-13 17:43:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2019-10-13 17:43:48,970 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 65 [2019-10-13 17:43:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:48,971 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2019-10-13 17:43:48,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:43:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2019-10-13 17:43:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-13 17:43:48,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:48,972 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:49,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:49,175 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:49,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2053564700, now seen corresponding path program 11 times [2019-10-13 17:43:49,176 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:49,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487552242] [2019-10-13 17:43:49,177 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:49,177 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:49,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:43:49,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487552242] [2019-10-13 17:43:49,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554053698] [2019-10-13 17:43:49,341 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:49,491 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-10-13 17:43:49,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:49,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:43:49,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 17:43:49,530 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:49,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:43:49,531 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237835791] [2019-10-13 17:43:49,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:43:49,532 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:49,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:43:49,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:43:49,532 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand 19 states. [2019-10-13 17:43:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:49,633 INFO L93 Difference]: Finished difference Result 182 states and 228 transitions. [2019-10-13 17:43:49,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:43:49,634 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2019-10-13 17:43:49,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:49,635 INFO L225 Difference]: With dead ends: 182 [2019-10-13 17:43:49,635 INFO L226 Difference]: Without dead ends: 110 [2019-10-13 17:43:49,636 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:43:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-13 17:43:49,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-10-13 17:43:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-13 17:43:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2019-10-13 17:43:49,641 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 67 [2019-10-13 17:43:49,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:49,642 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2019-10-13 17:43:49,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:43:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2019-10-13 17:43:49,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-13 17:43:49,643 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:49,643 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:49,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:49,846 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:49,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:49,847 INFO L82 PathProgramCache]: Analyzing trace with hash 360391106, now seen corresponding path program 12 times [2019-10-13 17:43:49,847 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:49,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391561171] [2019-10-13 17:43:49,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:49,848 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:49,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:43:50,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391561171] [2019-10-13 17:43:50,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306085676] [2019-10-13 17:43:50,017 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:50,105 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-13 17:43:50,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:50,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:43:50,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2019-10-13 17:43:50,200 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:50,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-10-13 17:43:50,200 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69328461] [2019-10-13 17:43:50,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:43:50,201 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:50,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:43:50,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:43:50,201 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand 25 states. [2019-10-13 17:43:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:50,840 INFO L93 Difference]: Finished difference Result 199 states and 253 transitions. [2019-10-13 17:43:50,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:43:50,842 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2019-10-13 17:43:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:50,843 INFO L225 Difference]: With dead ends: 199 [2019-10-13 17:43:50,843 INFO L226 Difference]: Without dead ends: 127 [2019-10-13 17:43:50,844 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=521, Invalid=1549, Unknown=0, NotChecked=0, Total=2070 [2019-10-13 17:43:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-13 17:43:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2019-10-13 17:43:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-13 17:43:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 142 transitions. [2019-10-13 17:43:50,850 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 142 transitions. Word has length 69 [2019-10-13 17:43:50,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:50,850 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 142 transitions. [2019-10-13 17:43:50,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:43:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 142 transitions. [2019-10-13 17:43:50,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-13 17:43:50,851 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:50,852 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:51,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:51,055 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:51,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:51,056 INFO L82 PathProgramCache]: Analyzing trace with hash 390599083, now seen corresponding path program 13 times [2019-10-13 17:43:51,056 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:51,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645770409] [2019-10-13 17:43:51,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:51,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:51,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 17:43:51,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645770409] [2019-10-13 17:43:51,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238030543] [2019-10-13 17:43:51,265 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:51,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:43:51,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 17:43:51,360 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:51,360 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:43:51,361 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253410361] [2019-10-13 17:43:51,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:43:51,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:51,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:43:51,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:43:51,365 INFO L87 Difference]: Start difference. First operand 117 states and 142 transitions. Second operand 21 states. [2019-10-13 17:43:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:51,517 INFO L93 Difference]: Finished difference Result 198 states and 248 transitions. [2019-10-13 17:43:51,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:43:51,517 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 74 [2019-10-13 17:43:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:51,519 INFO L225 Difference]: With dead ends: 198 [2019-10-13 17:43:51,519 INFO L226 Difference]: Without dead ends: 120 [2019-10-13 17:43:51,520 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:43:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-13 17:43:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2019-10-13 17:43:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-13 17:43:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 144 transitions. [2019-10-13 17:43:51,526 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 144 transitions. Word has length 74 [2019-10-13 17:43:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:51,527 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 144 transitions. [2019-10-13 17:43:51,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:43:51,527 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 144 transitions. [2019-10-13 17:43:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-13 17:43:51,528 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:51,528 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:51,735 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:51,736 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash 640397581, now seen corresponding path program 14 times [2019-10-13 17:43:51,737 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:51,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432620329] [2019-10-13 17:43:51,738 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:51,738 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:51,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 17:43:51,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432620329] [2019-10-13 17:43:51,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401151389] [2019-10-13 17:43:51,930 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:52,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:52,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:52,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 17:43:52,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-13 17:43:52,026 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:52,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-13 17:43:52,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800135424] [2019-10-13 17:43:52,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 17:43:52,027 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:52,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 17:43:52,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:43:52,028 INFO L87 Difference]: Start difference. First operand 119 states and 144 transitions. Second operand 22 states. [2019-10-13 17:43:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:52,155 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2019-10-13 17:43:52,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:43:52,155 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 76 [2019-10-13 17:43:52,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:52,157 INFO L225 Difference]: With dead ends: 200 [2019-10-13 17:43:52,157 INFO L226 Difference]: Without dead ends: 122 [2019-10-13 17:43:52,158 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:43:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-13 17:43:52,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2019-10-13 17:43:52,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-13 17:43:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 146 transitions. [2019-10-13 17:43:52,164 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 146 transitions. Word has length 76 [2019-10-13 17:43:52,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:52,164 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 146 transitions. [2019-10-13 17:43:52,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 17:43:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 146 transitions. [2019-10-13 17:43:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 17:43:52,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:52,165 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:52,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:52,369 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:52,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:52,370 INFO L82 PathProgramCache]: Analyzing trace with hash 178585583, now seen corresponding path program 15 times [2019-10-13 17:43:52,370 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:52,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652608610] [2019-10-13 17:43:52,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:52,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:52,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 17:43:52,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652608610] [2019-10-13 17:43:52,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324358332] [2019-10-13 17:43:52,601 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:52,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:43:52,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:52,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:43:52,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-13 17:43:52,777 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:52,777 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2019-10-13 17:43:52,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281155794] [2019-10-13 17:43:52,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-13 17:43:52,777 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:52,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-13 17:43:52,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:43:52,778 INFO L87 Difference]: Start difference. First operand 121 states and 146 transitions. Second operand 29 states. [2019-10-13 17:43:53,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:53,429 INFO L93 Difference]: Finished difference Result 217 states and 275 transitions. [2019-10-13 17:43:53,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:43:53,429 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 78 [2019-10-13 17:43:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:53,431 INFO L225 Difference]: With dead ends: 217 [2019-10-13 17:43:53,431 INFO L226 Difference]: Without dead ends: 139 [2019-10-13 17:43:53,435 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=713, Invalid=2149, Unknown=0, NotChecked=0, Total=2862 [2019-10-13 17:43:53,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-13 17:43:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2019-10-13 17:43:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-10-13 17:43:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2019-10-13 17:43:53,445 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 78 [2019-10-13 17:43:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:53,445 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2019-10-13 17:43:53,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-13 17:43:53,446 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2019-10-13 17:43:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-13 17:43:53,447 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:53,447 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:53,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:53,652 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:53,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:53,653 INFO L82 PathProgramCache]: Analyzing trace with hash 212109018, now seen corresponding path program 16 times [2019-10-13 17:43:53,653 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:53,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107038677] [2019-10-13 17:43:53,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:53,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:53,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 17:43:53,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107038677] [2019-10-13 17:43:53,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103484572] [2019-10-13 17:43:53,937 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:54,016 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:54,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:54,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 17:43:54,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 17:43:54,039 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:54,039 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-13 17:43:54,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516687964] [2019-10-13 17:43:54,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:43:54,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:54,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:43:54,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:43:54,040 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand 24 states. [2019-10-13 17:43:54,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:54,161 INFO L93 Difference]: Finished difference Result 216 states and 270 transitions. [2019-10-13 17:43:54,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:43:54,162 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 83 [2019-10-13 17:43:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:54,163 INFO L225 Difference]: With dead ends: 216 [2019-10-13 17:43:54,163 INFO L226 Difference]: Without dead ends: 132 [2019-10-13 17:43:54,164 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:43:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-13 17:43:54,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2019-10-13 17:43:54,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-10-13 17:43:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 158 transitions. [2019-10-13 17:43:54,173 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 158 transitions. Word has length 83 [2019-10-13 17:43:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:54,174 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 158 transitions. [2019-10-13 17:43:54,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:43:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 158 transitions. [2019-10-13 17:43:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-13 17:43:54,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:54,175 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:54,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:54,379 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:54,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:54,379 INFO L82 PathProgramCache]: Analyzing trace with hash 780211640, now seen corresponding path program 17 times [2019-10-13 17:43:54,379 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:54,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836568053] [2019-10-13 17:43:54,379 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:54,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:54,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 17:43:54,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836568053] [2019-10-13 17:43:54,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143643719] [2019-10-13 17:43:54,673 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:55,063 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-13 17:43:55,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:55,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:43:55,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 17:43:55,096 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:55,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-13 17:43:55,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160862191] [2019-10-13 17:43:55,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:43:55,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:55,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:43:55,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:43:55,098 INFO L87 Difference]: Start difference. First operand 131 states and 158 transitions. Second operand 25 states. [2019-10-13 17:43:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:55,208 INFO L93 Difference]: Finished difference Result 218 states and 272 transitions. [2019-10-13 17:43:55,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:43:55,209 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 85 [2019-10-13 17:43:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:55,210 INFO L225 Difference]: With dead ends: 218 [2019-10-13 17:43:55,210 INFO L226 Difference]: Without dead ends: 134 [2019-10-13 17:43:55,211 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:43:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-10-13 17:43:55,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-10-13 17:43:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-10-13 17:43:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2019-10-13 17:43:55,218 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 85 [2019-10-13 17:43:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:55,219 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2019-10-13 17:43:55,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:43:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2019-10-13 17:43:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 17:43:55,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:55,220 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:55,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:55,425 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:55,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1265984790, now seen corresponding path program 18 times [2019-10-13 17:43:55,426 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:55,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155807302] [2019-10-13 17:43:55,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:55,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:55,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 17:43:55,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155807302] [2019-10-13 17:43:55,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104361794] [2019-10-13 17:43:55,808 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:56,067 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 17:43:56,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:56,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:43:56,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2019-10-13 17:43:56,182 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:56,183 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2019-10-13 17:43:56,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370241243] [2019-10-13 17:43:56,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 17:43:56,183 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:56,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 17:43:56,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:43:56,184 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand 33 states. [2019-10-13 17:43:57,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:57,059 INFO L93 Difference]: Finished difference Result 235 states and 297 transitions. [2019-10-13 17:43:57,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-13 17:43:57,059 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 87 [2019-10-13 17:43:57,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:57,060 INFO L225 Difference]: With dead ends: 235 [2019-10-13 17:43:57,061 INFO L226 Difference]: Without dead ends: 151 [2019-10-13 17:43:57,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=935, Invalid=2847, Unknown=0, NotChecked=0, Total=3782 [2019-10-13 17:43:57,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-13 17:43:57,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2019-10-13 17:43:57,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-10-13 17:43:57,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 170 transitions. [2019-10-13 17:43:57,072 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 170 transitions. Word has length 87 [2019-10-13 17:43:57,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:57,073 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 170 transitions. [2019-10-13 17:43:57,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 17:43:57,073 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 170 transitions. [2019-10-13 17:43:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-13 17:43:57,074 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:57,074 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:57,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:57,275 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:57,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:57,275 INFO L82 PathProgramCache]: Analyzing trace with hash 936225111, now seen corresponding path program 19 times [2019-10-13 17:43:57,276 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:57,276 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367306444] [2019-10-13 17:43:57,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:57,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:57,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-13 17:43:57,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367306444] [2019-10-13 17:43:57,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926239187] [2019-10-13 17:43:57,570 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:57,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 17:43:57,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 17:43:57,696 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:57,696 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-13 17:43:57,696 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640213489] [2019-10-13 17:43:57,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 17:43:57,697 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:57,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 17:43:57,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:43:57,698 INFO L87 Difference]: Start difference. First operand 141 states and 170 transitions. Second operand 27 states. [2019-10-13 17:43:57,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:57,899 INFO L93 Difference]: Finished difference Result 234 states and 292 transitions. [2019-10-13 17:43:57,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 17:43:57,899 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 92 [2019-10-13 17:43:57,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:57,900 INFO L225 Difference]: With dead ends: 234 [2019-10-13 17:43:57,900 INFO L226 Difference]: Without dead ends: 144 [2019-10-13 17:43:57,901 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:43:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-10-13 17:43:57,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2019-10-13 17:43:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-13 17:43:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 172 transitions. [2019-10-13 17:43:57,911 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 172 transitions. Word has length 92 [2019-10-13 17:43:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:57,911 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 172 transitions. [2019-10-13 17:43:57,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 17:43:57,912 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 172 transitions. [2019-10-13 17:43:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-13 17:43:57,913 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:57,913 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:58,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:58,117 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:58,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:58,117 INFO L82 PathProgramCache]: Analyzing trace with hash 31519801, now seen corresponding path program 20 times [2019-10-13 17:43:58,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:58,118 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512476353] [2019-10-13 17:43:58,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:58,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:58,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-13 17:43:58,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512476353] [2019-10-13 17:43:58,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52682797] [2019-10-13 17:43:58,427 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:58,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:58,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:58,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 17:43:58,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 17:43:58,533 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:58,533 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-13 17:43:58,533 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091268468] [2019-10-13 17:43:58,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:43:58,534 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:58,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:43:58,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:43:58,534 INFO L87 Difference]: Start difference. First operand 143 states and 172 transitions. Second operand 28 states. [2019-10-13 17:43:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:58,760 INFO L93 Difference]: Finished difference Result 236 states and 294 transitions. [2019-10-13 17:43:58,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:43:58,761 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 94 [2019-10-13 17:43:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:58,762 INFO L225 Difference]: With dead ends: 236 [2019-10-13 17:43:58,762 INFO L226 Difference]: Without dead ends: 146 [2019-10-13 17:43:58,763 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:43:58,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-13 17:43:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-10-13 17:43:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-13 17:43:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 174 transitions. [2019-10-13 17:43:58,769 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 174 transitions. Word has length 94 [2019-10-13 17:43:58,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:58,770 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 174 transitions. [2019-10-13 17:43:58,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:43:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 174 transitions. [2019-10-13 17:43:58,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 17:43:58,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:58,773 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:58,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:58,976 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:58,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:58,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1806889317, now seen corresponding path program 21 times [2019-10-13 17:43:58,977 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:58,977 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513035075] [2019-10-13 17:43:58,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:58,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:58,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-13 17:43:59,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513035075] [2019-10-13 17:43:59,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681080040] [2019-10-13 17:43:59,316 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:59,406 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-13 17:43:59,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:59,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:59,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2019-10-13 17:43:59,588 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:59,588 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2019-10-13 17:43:59,588 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819435007] [2019-10-13 17:43:59,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-13 17:43:59,589 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:59,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-13 17:43:59,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=933, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:43:59,589 INFO L87 Difference]: Start difference. First operand 145 states and 174 transitions. Second operand 37 states. [2019-10-13 17:44:00,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:00,657 INFO L93 Difference]: Finished difference Result 253 states and 319 transitions. [2019-10-13 17:44:00,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-13 17:44:00,657 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 96 [2019-10-13 17:44:00,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:00,659 INFO L225 Difference]: With dead ends: 253 [2019-10-13 17:44:00,659 INFO L226 Difference]: Without dead ends: 163 [2019-10-13 17:44:00,661 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1187, Invalid=3643, Unknown=0, NotChecked=0, Total=4830 [2019-10-13 17:44:00,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-10-13 17:44:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 153. [2019-10-13 17:44:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-10-13 17:44:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 184 transitions. [2019-10-13 17:44:00,668 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 184 transitions. Word has length 96 [2019-10-13 17:44:00,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:00,669 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 184 transitions. [2019-10-13 17:44:00,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-13 17:44:00,669 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 184 transitions. [2019-10-13 17:44:00,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-13 17:44:00,670 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:00,670 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:00,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:00,874 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:00,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:00,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1003991762, now seen corresponding path program 22 times [2019-10-13 17:44:00,875 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:00,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077537699] [2019-10-13 17:44:00,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:00,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:00,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 17:44:01,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077537699] [2019-10-13 17:44:01,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871397698] [2019-10-13 17:44:01,283 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:01,378 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:44:01,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:01,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 17:44:01,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-13 17:44:01,398 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:01,399 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-13 17:44:01,399 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297937466] [2019-10-13 17:44:01,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:44:01,399 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:01,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:44:01,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:44:01,400 INFO L87 Difference]: Start difference. First operand 153 states and 184 transitions. Second operand 30 states. [2019-10-13 17:44:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:01,621 INFO L93 Difference]: Finished difference Result 252 states and 314 transitions. [2019-10-13 17:44:01,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:44:01,621 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 101 [2019-10-13 17:44:01,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:01,622 INFO L225 Difference]: With dead ends: 252 [2019-10-13 17:44:01,623 INFO L226 Difference]: Without dead ends: 156 [2019-10-13 17:44:01,623 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:44:01,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-10-13 17:44:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2019-10-13 17:44:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-10-13 17:44:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 186 transitions. [2019-10-13 17:44:01,631 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 186 transitions. Word has length 101 [2019-10-13 17:44:01,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:01,631 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 186 transitions. [2019-10-13 17:44:01,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:44:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 186 transitions. [2019-10-13 17:44:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-13 17:44:01,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:01,632 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:01,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:01,836 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:01,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2097274740, now seen corresponding path program 23 times [2019-10-13 17:44:01,837 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:01,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58413002] [2019-10-13 17:44:01,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:01,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:01,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 17:44:02,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58413002] [2019-10-13 17:44:02,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856250166] [2019-10-13 17:44:02,417 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:03,732 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2019-10-13 17:44:03,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:03,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 17:44:03,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-13 17:44:03,762 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:03,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-13 17:44:03,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259503332] [2019-10-13 17:44:03,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 17:44:03,763 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:03,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 17:44:03,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:44:03,764 INFO L87 Difference]: Start difference. First operand 155 states and 186 transitions. Second operand 31 states. [2019-10-13 17:44:03,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:03,931 INFO L93 Difference]: Finished difference Result 254 states and 316 transitions. [2019-10-13 17:44:03,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:44:03,931 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 103 [2019-10-13 17:44:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:03,932 INFO L225 Difference]: With dead ends: 254 [2019-10-13 17:44:03,932 INFO L226 Difference]: Without dead ends: 158 [2019-10-13 17:44:03,933 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:44:03,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-10-13 17:44:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2019-10-13 17:44:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-13 17:44:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2019-10-13 17:44:03,940 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 188 transitions. Word has length 103 [2019-10-13 17:44:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:03,940 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 188 transitions. [2019-10-13 17:44:03,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 17:44:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 188 transitions. [2019-10-13 17:44:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-13 17:44:03,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:03,941 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:04,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:04,147 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:04,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:04,148 INFO L82 PathProgramCache]: Analyzing trace with hash -475229078, now seen corresponding path program 24 times [2019-10-13 17:44:04,148 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:04,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396139246] [2019-10-13 17:44:04,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:04,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:04,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 17:44:04,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396139246] [2019-10-13 17:44:04,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799599677] [2019-10-13 17:44:04,825 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:05,296 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-13 17:44:05,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:05,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:44:05,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2019-10-13 17:44:05,472 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:05,472 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2019-10-13 17:44:05,472 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070645284] [2019-10-13 17:44:05,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-13 17:44:05,473 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:05,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-13 17:44:05,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=1147, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 17:44:05,474 INFO L87 Difference]: Start difference. First operand 157 states and 188 transitions. Second operand 41 states. [2019-10-13 17:44:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:06,668 INFO L93 Difference]: Finished difference Result 271 states and 341 transitions. [2019-10-13 17:44:06,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-13 17:44:06,668 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 105 [2019-10-13 17:44:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:06,670 INFO L225 Difference]: With dead ends: 271 [2019-10-13 17:44:06,670 INFO L226 Difference]: Without dead ends: 175 [2019-10-13 17:44:06,673 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1469, Invalid=4537, Unknown=0, NotChecked=0, Total=6006 [2019-10-13 17:44:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-13 17:44:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2019-10-13 17:44:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-10-13 17:44:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 198 transitions. [2019-10-13 17:44:06,679 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 198 transitions. Word has length 105 [2019-10-13 17:44:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:06,679 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 198 transitions. [2019-10-13 17:44:06,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-13 17:44:06,680 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 198 transitions. [2019-10-13 17:44:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 17:44:06,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:06,681 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:06,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:06,886 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:06,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:06,886 INFO L82 PathProgramCache]: Analyzing trace with hash -14486269, now seen corresponding path program 25 times [2019-10-13 17:44:06,887 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:06,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584649946] [2019-10-13 17:44:06,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:06,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:06,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-10-13 17:44:07,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584649946] [2019-10-13 17:44:07,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898598225] [2019-10-13 17:44:07,389 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:07,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-13 17:44:07,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-13 17:44:07,572 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:07,572 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-13 17:44:07,572 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777030012] [2019-10-13 17:44:07,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 17:44:07,573 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:07,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 17:44:07,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:44:07,574 INFO L87 Difference]: Start difference. First operand 165 states and 198 transitions. Second operand 33 states. [2019-10-13 17:44:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:07,875 INFO L93 Difference]: Finished difference Result 270 states and 336 transitions. [2019-10-13 17:44:07,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 17:44:07,875 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 110 [2019-10-13 17:44:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:07,876 INFO L225 Difference]: With dead ends: 270 [2019-10-13 17:44:07,876 INFO L226 Difference]: Without dead ends: 168 [2019-10-13 17:44:07,877 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:44:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-10-13 17:44:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2019-10-13 17:44:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-10-13 17:44:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 200 transitions. [2019-10-13 17:44:07,890 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 200 transitions. Word has length 110 [2019-10-13 17:44:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:07,890 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 200 transitions. [2019-10-13 17:44:07,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 17:44:07,891 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 200 transitions. [2019-10-13 17:44:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 17:44:07,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:07,892 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:08,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:08,097 INFO L410 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:08,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1528957797, now seen corresponding path program 26 times [2019-10-13 17:44:08,098 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:08,098 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716810525] [2019-10-13 17:44:08,098 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:08,098 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:08,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-10-13 17:44:08,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716810525] [2019-10-13 17:44:08,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128161879] [2019-10-13 17:44:08,576 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:08,670 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:44:08,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:08,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-13 17:44:08,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-13 17:44:08,719 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:08,720 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2019-10-13 17:44:08,720 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174584627] [2019-10-13 17:44:08,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-13 17:44:08,720 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:08,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-13 17:44:08,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 17:44:08,721 INFO L87 Difference]: Start difference. First operand 167 states and 200 transitions. Second operand 34 states. [2019-10-13 17:44:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:08,868 INFO L93 Difference]: Finished difference Result 272 states and 338 transitions. [2019-10-13 17:44:08,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-13 17:44:08,869 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 112 [2019-10-13 17:44:08,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:08,870 INFO L225 Difference]: With dead ends: 272 [2019-10-13 17:44:08,870 INFO L226 Difference]: Without dead ends: 170 [2019-10-13 17:44:08,871 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 17:44:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-10-13 17:44:08,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-10-13 17:44:08,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-10-13 17:44:08,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2019-10-13 17:44:08,879 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 112 [2019-10-13 17:44:08,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:08,879 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2019-10-13 17:44:08,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-13 17:44:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2019-10-13 17:44:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-13 17:44:08,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:08,880 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:09,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:09,084 INFO L410 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:09,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1279979193, now seen corresponding path program 27 times [2019-10-13 17:44:09,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:09,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127374791] [2019-10-13 17:44:09,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:09,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:09,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-10-13 17:44:09,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127374791] [2019-10-13 17:44:09,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247749463] [2019-10-13 17:44:09,885 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:10,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-13 17:44:10,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:10,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:44:10,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2019-10-13 17:44:10,236 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:10,236 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2019-10-13 17:44:10,236 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258423935] [2019-10-13 17:44:10,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-10-13 17:44:10,237 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-10-13 17:44:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1383, Unknown=0, NotChecked=0, Total=1980 [2019-10-13 17:44:10,237 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 45 states. [2019-10-13 17:44:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:11,675 INFO L93 Difference]: Finished difference Result 289 states and 363 transitions. [2019-10-13 17:44:11,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-13 17:44:11,675 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 114 [2019-10-13 17:44:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:11,677 INFO L225 Difference]: With dead ends: 289 [2019-10-13 17:44:11,677 INFO L226 Difference]: Without dead ends: 187 [2019-10-13 17:44:11,680 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1781, Invalid=5529, Unknown=0, NotChecked=0, Total=7310 [2019-10-13 17:44:11,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-10-13 17:44:11,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2019-10-13 17:44:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-10-13 17:44:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 212 transitions. [2019-10-13 17:44:11,687 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 212 transitions. Word has length 114 [2019-10-13 17:44:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:11,687 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 212 transitions. [2019-10-13 17:44:11,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-10-13 17:44:11,688 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 212 transitions. [2019-10-13 17:44:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 17:44:11,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:11,689 INFO L380 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:11,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:11,893 INFO L410 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:11,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1948811390, now seen corresponding path program 28 times [2019-10-13 17:44:11,893 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:11,893 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389756005] [2019-10-13 17:44:11,894 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:11,894 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:11,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-13 17:44:12,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389756005] [2019-10-13 17:44:12,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796902388] [2019-10-13 17:44:12,485 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:12,587 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:44:12,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:12,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-13 17:44:12,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-13 17:44:12,617 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:12,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-10-13 17:44:12,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122302884] [2019-10-13 17:44:12,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 17:44:12,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:12,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 17:44:12,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:44:12,621 INFO L87 Difference]: Start difference. First operand 177 states and 212 transitions. Second operand 36 states. [2019-10-13 17:44:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:12,835 INFO L93 Difference]: Finished difference Result 288 states and 358 transitions. [2019-10-13 17:44:12,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-13 17:44:12,835 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 119 [2019-10-13 17:44:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:12,836 INFO L225 Difference]: With dead ends: 288 [2019-10-13 17:44:12,836 INFO L226 Difference]: Without dead ends: 180 [2019-10-13 17:44:12,837 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:44:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-10-13 17:44:12,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2019-10-13 17:44:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-10-13 17:44:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2019-10-13 17:44:12,842 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 119 [2019-10-13 17:44:12,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:12,843 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2019-10-13 17:44:12,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 17:44:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2019-10-13 17:44:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 17:44:12,844 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:12,844 INFO L380 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:13,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:13,048 INFO L410 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:13,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:13,049 INFO L82 PathProgramCache]: Analyzing trace with hash 311326560, now seen corresponding path program 29 times [2019-10-13 17:44:13,049 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:13,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610213158] [2019-10-13 17:44:13,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:13,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:13,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-13 17:44:13,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610213158] [2019-10-13 17:44:13,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768314752] [2019-10-13 17:44:13,601 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:14,594 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2019-10-13 17:44:14,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:14,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-13 17:44:14,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-13 17:44:14,631 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:14,631 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-10-13 17:44:14,631 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186362951] [2019-10-13 17:44:14,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-13 17:44:14,631 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:14,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-13 17:44:14,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:44:14,632 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand 37 states. [2019-10-13 17:44:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:14,898 INFO L93 Difference]: Finished difference Result 290 states and 360 transitions. [2019-10-13 17:44:14,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 17:44:14,898 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 121 [2019-10-13 17:44:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:14,899 INFO L225 Difference]: With dead ends: 290 [2019-10-13 17:44:14,900 INFO L226 Difference]: Without dead ends: 182 [2019-10-13 17:44:14,901 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:44:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-10-13 17:44:14,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2019-10-13 17:44:14,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-10-13 17:44:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2019-10-13 17:44:14,908 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 121 [2019-10-13 17:44:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:14,908 INFO L462 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2019-10-13 17:44:14,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-13 17:44:14,908 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2019-10-13 17:44:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 17:44:14,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:14,909 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:15,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:15,116 INFO L410 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:15,116 INFO L82 PathProgramCache]: Analyzing trace with hash -949555266, now seen corresponding path program 30 times [2019-10-13 17:44:15,116 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:15,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130024379] [2019-10-13 17:44:15,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:15,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:15,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-13 17:44:15,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130024379] [2019-10-13 17:44:15,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702528206] [2019-10-13 17:44:15,897 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:17,671 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-10-13 17:44:17,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:17,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:44:17,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 65 proven. 145 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2019-10-13 17:44:17,981 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:17,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 16] total 51 [2019-10-13 17:44:17,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589361793] [2019-10-13 17:44:17,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-10-13 17:44:17,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:17,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-10-13 17:44:17,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=1766, Unknown=0, NotChecked=0, Total=2550 [2019-10-13 17:44:17,983 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand 51 states.