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_bubblesort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:43:35,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:43:35,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:43:35,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:43:35,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:43:35,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:43:35,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:43:35,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:43:35,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:43:35,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:43:35,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:43:35,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:43:35,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:43:35,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:43:35,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:43:35,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:43:35,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:43:35,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:43:35,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:43:35,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:43:35,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:43:35,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:43:35,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:43:35,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:43:35,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:43:35,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:43:35,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:43:35,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:43:35,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:43:35,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:43:35,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:43:35,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:43:35,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:43:35,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:43:35,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:43:35,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:43:35,226 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 17:43:35,252 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:43:35,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:43:35,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:43:35,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:43:35,254 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:43:35,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:43:35,259 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:43:35,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:43:35,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:43:35,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:43:35,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:43:35,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:43:35,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:43:35,263 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:43:35,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:43:35,263 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:43:35,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:43:35,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:43:35,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:43:35,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:43:35,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:43:35,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:43:35,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:43:35,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:43:35,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:43:35,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:43:35,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:43:35,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:43:35,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:43:35,534 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:43:35,546 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:43:35,550 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:43:35,551 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:43:35,551 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:43:35,552 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2019-10-13 17:43:35,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a77f1b0b/2a2bdd32a07b44ef965759015904d4ec/FLAG9c1914100 [2019-10-13 17:43:36,035 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:43:36,035 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2019-10-13 17:43:36,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a77f1b0b/2a2bdd32a07b44ef965759015904d4ec/FLAG9c1914100 [2019-10-13 17:43:36,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a77f1b0b/2a2bdd32a07b44ef965759015904d4ec [2019-10-13 17:43:36,455 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:43:36,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:43:36,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:43:36,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:43:36,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:43:36,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:43:36" (1/1) ... [2019-10-13 17:43:36,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f25ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:36, skipping insertion in model container [2019-10-13 17:43:36,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:43:36" (1/1) ... [2019-10-13 17:43:36,472 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:43:36,494 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:43:36,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:43:36,675 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:43:36,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:43:36,715 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:43:36,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:36 WrapperNode [2019-10-13 17:43:36,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:43:36,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:43:36,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:43:36,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:43:36,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:36" (1/1) ... [2019-10-13 17:43:36,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:36" (1/1) ... [2019-10-13 17:43:36,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:36" (1/1) ... [2019-10-13 17:43:36,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:36" (1/1) ... [2019-10-13 17:43:36,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:36" (1/1) ... [2019-10-13 17:43:36,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:36" (1/1) ... [2019-10-13 17:43:36,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:36" (1/1) ... [2019-10-13 17:43:36,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:43:36,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:43:36,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:43:36,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:43:36,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:36" (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 17:43:36,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:43:36,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:43:36,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:43:36,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:43:36,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:43:36,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:43:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:43:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:43:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:43:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:43:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:43:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:43:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:43:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:43:37,124 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:43:37,125 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 17:43:37,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:43:37 BoogieIcfgContainer [2019-10-13 17:43:37,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:43:37,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:43:37,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:43:37,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:43:37,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:43:36" (1/3) ... [2019-10-13 17:43:37,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34907db8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:43:37, skipping insertion in model container [2019-10-13 17:43:37,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:36" (2/3) ... [2019-10-13 17:43:37,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34907db8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:43:37, skipping insertion in model container [2019-10-13 17:43:37,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:43:37" (3/3) ... [2019-10-13 17:43:37,137 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2019-10-13 17:43:37,153 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:43:37,162 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:43:37,187 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:43:37,218 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:43:37,218 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:43:37,218 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:43:37,218 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:43:37,219 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:43:37,219 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:43:37,219 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:43:37,219 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:43:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-13 17:43:37,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:43:37,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:37,245 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:37,246 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:37,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:37,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1296691801, now seen corresponding path program 1 times [2019-10-13 17:43:37,261 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:37,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565658796] [2019-10-13 17:43:37,262 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:37,262 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:37,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:37,440 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 17:43:37,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565658796] [2019-10-13 17:43:37,441 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:37,441 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:43:37,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545635026] [2019-10-13 17:43:37,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:43:37,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:37,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:43:37,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:43:37,461 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-13 17:43:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:37,570 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2019-10-13 17:43:37,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:43:37,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-13 17:43:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:37,580 INFO L225 Difference]: With dead ends: 54 [2019-10-13 17:43:37,580 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 17:43:37,583 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 17:43:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 17:43:37,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 17:43:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 17:43:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-13 17:43:37,620 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-10-13 17:43:37,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:37,620 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-13 17:43:37,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:43:37,621 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-13 17:43:37,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:43:37,622 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:37,622 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:37,622 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:37,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:37,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1547542812, now seen corresponding path program 1 times [2019-10-13 17:43:37,623 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:37,623 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337024670] [2019-10-13 17:43:37,624 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:37,624 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:37,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:37,692 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 17:43:37,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337024670] [2019-10-13 17:43:37,693 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:37,693 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:43:37,693 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600796354] [2019-10-13 17:43:37,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:37,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:37,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:37,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:37,697 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-10-13 17:43:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:37,806 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-13 17:43:37,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:37,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-13 17:43:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:37,809 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:43:37,809 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 17:43:37,811 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 17:43:37,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 17:43:37,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-13 17:43:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:43:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-13 17:43:37,819 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-10-13 17:43:37,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:37,820 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-13 17:43:37,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:37,820 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-13 17:43:37,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 17:43:37,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:37,821 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 17:43:37,824 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:37,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:37,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1387426810, now seen corresponding path program 1 times [2019-10-13 17:43:37,825 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:37,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255438502] [2019-10-13 17:43:37,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:37,826 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:37,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:37,906 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 17:43:37,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255438502] [2019-10-13 17:43:37,907 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:37,907 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:43:37,907 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653191806] [2019-10-13 17:43:37,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:37,908 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:37,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:37,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:37,909 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2019-10-13 17:43:38,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:38,001 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-10-13 17:43:38,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:38,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-13 17:43:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:38,004 INFO L225 Difference]: With dead ends: 44 [2019-10-13 17:43:38,004 INFO L226 Difference]: Without dead ends: 31 [2019-10-13 17:43:38,004 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 17:43:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-13 17:43:38,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-13 17:43:38,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 17:43:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-10-13 17:43:38,012 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2019-10-13 17:43:38,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:38,012 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-10-13 17:43:38,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-10-13 17:43:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:43:38,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:38,015 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 17:43:38,015 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:38,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1108929549, now seen corresponding path program 1 times [2019-10-13 17:43:38,016 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:38,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328944948] [2019-10-13 17:43:38,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:38,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328944948] [2019-10-13 17:43:38,098 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:38,098 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:43:38,098 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987789185] [2019-10-13 17:43:38,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:38,099 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:38,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:38,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:38,100 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 4 states. [2019-10-13 17:43:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:38,173 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2019-10-13 17:43:38,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:38,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-13 17:43:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:38,175 INFO L225 Difference]: With dead ends: 56 [2019-10-13 17:43:38,175 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 17:43:38,176 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 17:43:38,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 17:43:38,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-10-13 17:43:38,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 17:43:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-10-13 17:43:38,183 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2019-10-13 17:43:38,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:38,183 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-10-13 17:43:38,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:38,184 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-10-13 17:43:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 17:43:38,185 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:38,185 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, 1, 1, 1] [2019-10-13 17:43:38,185 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:38,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:38,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2055572838, now seen corresponding path program 1 times [2019-10-13 17:43:38,186 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:38,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454116509] [2019-10-13 17:43:38,186 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:38,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454116509] [2019-10-13 17:43:38,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580774158] [2019-10-13 17:43:38,267 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 17:43:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:43:38,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:38,353 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:38,353 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:43:38,354 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341681317] [2019-10-13 17:43:38,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:43:38,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:38,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:43:38,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:43:38,357 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2019-10-13 17:43:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:38,428 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2019-10-13 17:43:38,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:43:38,428 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-13 17:43:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:38,429 INFO L225 Difference]: With dead ends: 58 [2019-10-13 17:43:38,429 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 17:43:38,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 17:43:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 17:43:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-13 17:43:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 17:43:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-10-13 17:43:38,436 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2019-10-13 17:43:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:38,436 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-10-13 17:43:38,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:43:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-10-13 17:43:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 17:43:38,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:38,438 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 17:43:38,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:38,639 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:38,639 INFO L82 PathProgramCache]: Analyzing trace with hash 442145592, now seen corresponding path program 2 times [2019-10-13 17:43:38,640 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:38,640 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001824976] [2019-10-13 17:43:38,640 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,640 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:38,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001824976] [2019-10-13 17:43:38,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762595253] [2019-10-13 17:43:38,718 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 17:43:38,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:38,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:38,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:43:38,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:38,792 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:38,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:43:38,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225646239] [2019-10-13 17:43:38,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:43:38,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:38,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:43:38,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:43:38,794 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 7 states. [2019-10-13 17:43:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:38,869 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2019-10-13 17:43:38,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:43:38,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-10-13 17:43:38,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:38,871 INFO L225 Difference]: With dead ends: 60 [2019-10-13 17:43:38,871 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 17:43:38,872 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 17:43:38,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 17:43:38,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-13 17:43:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 17:43:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2019-10-13 17:43:38,880 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2019-10-13 17:43:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:38,880 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2019-10-13 17:43:38,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:43:38,881 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2019-10-13 17:43:38,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 17:43:38,882 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:38,882 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 17:43:39,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:39,084 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:39,085 INFO L82 PathProgramCache]: Analyzing trace with hash -137161642, now seen corresponding path program 3 times [2019-10-13 17:43:39,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:39,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700874442] [2019-10-13 17:43:39,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:39,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700874442] [2019-10-13 17:43:39,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255479950] [2019-10-13 17:43:39,187 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 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 17:43:39,238 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:43:39,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:39,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:43:39,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:43:39,276 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:39,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-13 17:43:39,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998545282] [2019-10-13 17:43:39,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:43:39,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:39,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:43:39,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:39,278 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 9 states. [2019-10-13 17:43:39,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:39,401 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2019-10-13 17:43:39,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:43:39,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-10-13 17:43:39,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:39,403 INFO L225 Difference]: With dead ends: 71 [2019-10-13 17:43:39,403 INFO L226 Difference]: Without dead ends: 48 [2019-10-13 17:43:39,404 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 17:43:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-13 17:43:39,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2019-10-13 17:43:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 17:43:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2019-10-13 17:43:39,417 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2019-10-13 17:43:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:39,417 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2019-10-13 17:43:39,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:43:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2019-10-13 17:43:39,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:43:39,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:39,419 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] [2019-10-13 17:43:39,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:39,623 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:39,624 INFO L82 PathProgramCache]: Analyzing trace with hash -890436781, now seen corresponding path program 4 times [2019-10-13 17:43:39,624 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:39,625 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748600534] [2019-10-13 17:43:39,625 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,625 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 17:43:39,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748600534] [2019-10-13 17:43:39,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262487543] [2019-10-13 17:43:39,727 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 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 17:43:39,777 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:39,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:39,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:43:39,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 17:43:39,811 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:39,812 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:43:39,812 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230870879] [2019-10-13 17:43:39,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:43:39,813 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:43:39,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:39,813 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 9 states. [2019-10-13 17:43:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:39,911 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2019-10-13 17:43:39,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:43:39,912 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-10-13 17:43:39,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:39,913 INFO L225 Difference]: With dead ends: 74 [2019-10-13 17:43:39,913 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 17:43:39,913 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 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 17:43:39,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 17:43:39,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-10-13 17:43:39,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 17:43:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2019-10-13 17:43:39,922 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 32 [2019-10-13 17:43:39,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:39,922 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2019-10-13 17:43:39,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:43:39,923 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2019-10-13 17:43:39,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 17:43:39,923 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:39,924 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] [2019-10-13 17:43:40,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:40,125 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:40,126 INFO L82 PathProgramCache]: Analyzing trace with hash -250762123, now seen corresponding path program 5 times [2019-10-13 17:43:40,126 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:40,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393244747] [2019-10-13 17:43:40,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 17:43:40,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393244747] [2019-10-13 17:43:40,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944417724] [2019-10-13 17:43:40,274 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 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 17:43:40,317 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-13 17:43:40,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:40,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:43:40,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:43:40,382 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:40,382 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 17:43:40,382 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213161051] [2019-10-13 17:43:40,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:43:40,383 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:40,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:43:40,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:43:40,383 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 12 states. [2019-10-13 17:43:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:40,487 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-10-13 17:43:40,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:43:40,488 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2019-10-13 17:43:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:40,489 INFO L225 Difference]: With dead ends: 86 [2019-10-13 17:43:40,489 INFO L226 Difference]: Without dead ends: 58 [2019-10-13 17:43:40,490 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:43:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-13 17:43:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2019-10-13 17:43:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 17:43:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2019-10-13 17:43:40,496 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 34 [2019-10-13 17:43:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:40,496 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2019-10-13 17:43:40,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:43:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2019-10-13 17:43:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 17:43:40,497 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:40,498 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:40,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:40,699 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:40,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:40,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1537034928, now seen corresponding path program 6 times [2019-10-13 17:43:40,699 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:40,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435160296] [2019-10-13 17:43:40,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 17:43:40,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435160296] [2019-10-13 17:43:40,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644149153] [2019-10-13 17:43:40,814 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 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 17:43:40,866 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:43:40,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:40,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:43:40,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 17:43:40,905 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:40,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-13 17:43:40,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536832629] [2019-10-13 17:43:40,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:43:40,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:40,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:43:40,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:40,907 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 14 states. [2019-10-13 17:43:41,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:41,042 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2019-10-13 17:43:41,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:43:41,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-10-13 17:43:41,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:41,043 INFO L225 Difference]: With dead ends: 100 [2019-10-13 17:43:41,043 INFO L226 Difference]: Without dead ends: 66 [2019-10-13 17:43:41,044 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:41,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-13 17:43:41,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2019-10-13 17:43:41,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:43:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2019-10-13 17:43:41,051 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 39 [2019-10-13 17:43:41,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:41,052 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2019-10-13 17:43:41,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:43:41,052 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2019-10-13 17:43:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 17:43:41,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:41,053 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:41,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:41,264 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:41,265 INFO L82 PathProgramCache]: Analyzing trace with hash 747611417, now seen corresponding path program 7 times [2019-10-13 17:43:41,265 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:41,265 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090293592] [2019-10-13 17:43:41,265 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:41,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090293592] [2019-10-13 17:43:41,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742272790] [2019-10-13 17:43:41,402 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 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 17:43:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:43:41,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:41,492 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:41,492 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:43:41,493 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384906151] [2019-10-13 17:43:41,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:43:41,493 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:41,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:43:41,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:43:41,494 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 12 states. [2019-10-13 17:43:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:41,563 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2019-10-13 17:43:41,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:43:41,564 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2019-10-13 17:43:41,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:41,564 INFO L225 Difference]: With dead ends: 104 [2019-10-13 17:43:41,565 INFO L226 Difference]: Without dead ends: 64 [2019-10-13 17:43:41,565 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 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 17:43:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-13 17:43:41,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-10-13 17:43:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-13 17:43:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2019-10-13 17:43:41,571 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 44 [2019-10-13 17:43:41,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:41,572 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2019-10-13 17:43:41,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:43:41,572 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2019-10-13 17:43:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 17:43:41,573 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:41,573 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:41,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:41,781 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:41,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:41,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1331800891, now seen corresponding path program 8 times [2019-10-13 17:43:41,782 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:41,783 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823316522] [2019-10-13 17:43:41,783 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,783 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:41,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823316522] [2019-10-13 17:43:41,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199074804] [2019-10-13 17:43:41,907 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 17:43:41,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:41,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:41,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:41,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:41,980 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:41,980 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:43:41,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137281060] [2019-10-13 17:43:41,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:43:41,981 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:41,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:43:41,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:41,982 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 13 states. [2019-10-13 17:43:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:42,049 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2019-10-13 17:43:42,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:43:42,049 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2019-10-13 17:43:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:42,050 INFO L225 Difference]: With dead ends: 106 [2019-10-13 17:43:42,050 INFO L226 Difference]: Without dead ends: 66 [2019-10-13 17:43:42,051 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 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 17:43:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-13 17:43:42,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-10-13 17:43:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-13 17:43:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2019-10-13 17:43:42,058 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 46 [2019-10-13 17:43:42,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:42,059 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2019-10-13 17:43:42,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:43:42,059 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2019-10-13 17:43:42,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 17:43:42,060 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:42,060 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:42,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:42,263 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:42,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:42,264 INFO L82 PathProgramCache]: Analyzing trace with hash 97169629, now seen corresponding path program 9 times [2019-10-13 17:43:42,264 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:42,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331935185] [2019-10-13 17:43:42,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:42,265 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:42,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 17:43:42,370 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331935185] [2019-10-13 17:43:42,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381219111] [2019-10-13 17:43:42,371 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 17:43:42,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:43:42,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:42,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:43:42,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 17:43:42,507 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:42,507 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2019-10-13 17:43:42,507 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130282795] [2019-10-13 17:43:42,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:43:42,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:42,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:43:42,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:42,509 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 18 states. [2019-10-13 17:43:42,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:42,670 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2019-10-13 17:43:42,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:43:42,670 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2019-10-13 17:43:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:42,671 INFO L225 Difference]: With dead ends: 118 [2019-10-13 17:43:42,671 INFO L226 Difference]: Without dead ends: 78 [2019-10-13 17:43:42,672 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:42,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-13 17:43:42,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2019-10-13 17:43:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:43:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2019-10-13 17:43:42,678 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 48 [2019-10-13 17:43:42,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:42,678 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2019-10-13 17:43:42,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:43:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2019-10-13 17:43:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-13 17:43:42,679 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:42,679 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:42,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:42,890 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:42,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:42,891 INFO L82 PathProgramCache]: Analyzing trace with hash 830729064, now seen corresponding path program 10 times [2019-10-13 17:43:42,891 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:42,891 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97352063] [2019-10-13 17:43:42,891 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:42,891 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:42,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 17:43:43,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97352063] [2019-10-13 17:43:43,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313087972] [2019-10-13 17:43:43,043 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 17:43:43,089 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:43,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:43,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:43:43,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 17:43:43,121 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:43,122 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-13 17:43:43,122 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495370354] [2019-10-13 17:43:43,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:43:43,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:43,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:43:43,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:43:43,123 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 15 states. [2019-10-13 17:43:43,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:43,259 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2019-10-13 17:43:43,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:43:43,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2019-10-13 17:43:43,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:43,261 INFO L225 Difference]: With dead ends: 122 [2019-10-13 17:43:43,261 INFO L226 Difference]: Without dead ends: 76 [2019-10-13 17:43:43,262 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 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 17:43:43,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-13 17:43:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-13 17:43:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-13 17:43:43,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2019-10-13 17:43:43,267 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 53 [2019-10-13 17:43:43,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:43,268 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2019-10-13 17:43:43,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:43:43,268 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2019-10-13 17:43:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-13 17:43:43,269 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:43,269 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:43,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:43,470 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:43,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:43,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1163504518, now seen corresponding path program 11 times [2019-10-13 17:43:43,470 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:43,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045709121] [2019-10-13 17:43:43,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 17:43:43,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045709121] [2019-10-13 17:43:43,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458382991] [2019-10-13 17:43:43,623 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 17:43:43,694 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-13 17:43:43,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:43,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:43:43,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-13 17:43:43,790 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:43,790 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-13 17:43:43,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175426718] [2019-10-13 17:43:43,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:43:43,791 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:43,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:43:43,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:43:43,792 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 21 states. [2019-10-13 17:43:43,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:43,994 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2019-10-13 17:43:43,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:43:43,995 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2019-10-13 17:43:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:43,996 INFO L225 Difference]: With dead ends: 134 [2019-10-13 17:43:43,996 INFO L226 Difference]: Without dead ends: 88 [2019-10-13 17:43:43,997 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:43:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-13 17:43:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2019-10-13 17:43:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-13 17:43:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2019-10-13 17:43:44,002 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 55 [2019-10-13 17:43:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:44,003 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2019-10-13 17:43:44,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:43:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2019-10-13 17:43:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 17:43:44,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:44,004 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:44,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:44,208 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:44,208 INFO L82 PathProgramCache]: Analyzing trace with hash -264767709, now seen corresponding path program 12 times [2019-10-13 17:43:44,208 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:44,209 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946255507] [2019-10-13 17:43:44,209 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:44,209 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:44,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-13 17:43:44,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946255507] [2019-10-13 17:43:44,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387867170] [2019-10-13 17:43:44,357 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 17:43:44,475 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 17:43:44,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:44,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:43:44,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-13 17:43:44,572 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:44,572 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2019-10-13 17:43:44,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84533458] [2019-10-13 17:43:44,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 17:43:44,573 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:44,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 17:43:44,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:43:44,574 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 23 states. [2019-10-13 17:43:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:44,778 INFO L93 Difference]: Finished difference Result 148 states and 186 transitions. [2019-10-13 17:43:44,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:43:44,778 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2019-10-13 17:43:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:44,779 INFO L225 Difference]: With dead ends: 148 [2019-10-13 17:43:44,779 INFO L226 Difference]: Without dead ends: 96 [2019-10-13 17:43:44,780 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:43:44,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-13 17:43:44,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2019-10-13 17:43:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-13 17:43:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2019-10-13 17:43:44,793 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 60 [2019-10-13 17:43:44,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:44,793 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2019-10-13 17:43:44,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 17:43:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2019-10-13 17:43:44,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-13 17:43:44,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:44,795 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:45,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:45,006 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:45,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:45,006 INFO L82 PathProgramCache]: Analyzing trace with hash 980957794, now seen corresponding path program 13 times [2019-10-13 17:43:45,007 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:45,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449294580] [2019-10-13 17:43:45,007 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:45,007 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:45,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 17:43:45,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449294580] [2019-10-13 17:43:45,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807175508] [2019-10-13 17:43:45,184 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 17:43:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:43:45,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 17:43:45,280 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:45,280 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:43:45,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757955244] [2019-10-13 17:43:45,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:43:45,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:45,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:43:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:45,281 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 18 states. [2019-10-13 17:43:45,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:45,400 INFO L93 Difference]: Finished difference Result 152 states and 188 transitions. [2019-10-13 17:43:45,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:43:45,401 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2019-10-13 17:43:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:45,402 INFO L225 Difference]: With dead ends: 152 [2019-10-13 17:43:45,402 INFO L226 Difference]: Without dead ends: 94 [2019-10-13 17:43:45,403 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 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 17:43:45,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-13 17:43:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-13 17:43:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-13 17:43:45,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2019-10-13 17:43:45,409 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 65 [2019-10-13 17:43:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:45,410 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2019-10-13 17:43:45,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:43:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2019-10-13 17:43:45,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-13 17:43:45,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:45,412 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:45,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:45,621 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:45,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:45,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1862843776, now seen corresponding path program 14 times [2019-10-13 17:43:45,622 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:45,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579116374] [2019-10-13 17:43:45,622 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:45,622 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:45,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 17:43:45,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579116374] [2019-10-13 17:43:45,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468490938] [2019-10-13 17:43:45,814 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 17:43:45,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:45,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:45,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:43:45,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 17:43:45,921 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:45,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:43:45,922 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23754807] [2019-10-13 17:43:45,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:43:45,922 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:45,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:43:45,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:43:45,924 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand 19 states. [2019-10-13 17:43:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:46,096 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2019-10-13 17:43:46,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:43:46,096 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2019-10-13 17:43:46,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:46,097 INFO L225 Difference]: With dead ends: 154 [2019-10-13 17:43:46,097 INFO L226 Difference]: Without dead ends: 96 [2019-10-13 17:43:46,098 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 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 17:43:46,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-13 17:43:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-10-13 17:43:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-13 17:43:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2019-10-13 17:43:46,104 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 67 [2019-10-13 17:43:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:46,105 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2019-10-13 17:43:46,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:43:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2019-10-13 17:43:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-13 17:43:46,106 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:46,106 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:46,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:46,311 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:46,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1048252130, now seen corresponding path program 15 times [2019-10-13 17:43:46,312 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:46,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315529193] [2019-10-13 17:43:46,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:46,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:46,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 17:43:46,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315529193] [2019-10-13 17:43:46,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125217878] [2019-10-13 17:43:46,512 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 17:43:46,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 17:43:46,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:46,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:43:46,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-13 17:43:46,716 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:46,716 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2019-10-13 17:43:46,716 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126972921] [2019-10-13 17:43:46,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 17:43:46,717 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:46,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 17:43:46,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:43:46,718 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand 27 states. [2019-10-13 17:43:46,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:46,922 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2019-10-13 17:43:46,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:43:46,922 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2019-10-13 17:43:46,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:46,923 INFO L225 Difference]: With dead ends: 166 [2019-10-13 17:43:46,924 INFO L226 Difference]: Without dead ends: 108 [2019-10-13 17:43:46,924 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:43:46,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-13 17:43:46,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2019-10-13 17:43:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-13 17:43:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2019-10-13 17:43:46,928 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 69 [2019-10-13 17:43:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:46,929 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2019-10-13 17:43:46,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 17:43:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2019-10-13 17:43:46,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-13 17:43:46,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:46,930 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:47,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:47,134 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:47,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:47,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1331337461, now seen corresponding path program 16 times [2019-10-13 17:43:47,135 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:47,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369078738] [2019-10-13 17:43:47,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:47,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:47,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-13 17:43:47,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369078738] [2019-10-13 17:43:47,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318587801] [2019-10-13 17:43:47,343 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 17:43:47,401 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:47,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:47,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:47,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-10-13 17:43:47,536 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:47,536 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2019-10-13 17:43:47,536 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378326364] [2019-10-13 17:43:47,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-13 17:43:47,537 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:47,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-13 17:43:47,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:43:47,538 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand 29 states. [2019-10-13 17:43:47,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:47,674 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2019-10-13 17:43:47,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:43:47,675 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 74 [2019-10-13 17:43:47,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:47,676 INFO L225 Difference]: With dead ends: 180 [2019-10-13 17:43:47,676 INFO L226 Difference]: Without dead ends: 116 [2019-10-13 17:43:47,679 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:43:47,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-13 17:43:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2019-10-13 17:43:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-13 17:43:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2019-10-13 17:43:47,684 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 74 [2019-10-13 17:43:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:47,685 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2019-10-13 17:43:47,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-13 17:43:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2019-10-13 17:43:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-13 17:43:47,686 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:47,686 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:47,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:47,890 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash 261485818, now seen corresponding path program 17 times [2019-10-13 17:43:47,891 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:47,891 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110034034] [2019-10-13 17:43:47,891 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:47,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:47,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-13 17:43:48,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110034034] [2019-10-13 17:43:48,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632838618] [2019-10-13 17:43:48,142 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 17:43:48,538 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-13 17:43:48,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:48,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:43:48,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-13 17:43:48,721 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:48,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2019-10-13 17:43:48,721 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208275122] [2019-10-13 17:43:48,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 17:43:48,722 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:48,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 17:43:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:43:48,722 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand 31 states. [2019-10-13 17:43:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:49,043 INFO L93 Difference]: Finished difference Result 194 states and 244 transitions. [2019-10-13 17:43:49,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 17:43:49,044 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 79 [2019-10-13 17:43:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:49,045 INFO L225 Difference]: With dead ends: 194 [2019-10-13 17:43:49,045 INFO L226 Difference]: Without dead ends: 124 [2019-10-13 17:43:49,045 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:43:49,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-10-13 17:43:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2019-10-13 17:43:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-13 17:43:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 143 transitions. [2019-10-13 17:43:49,050 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 143 transitions. Word has length 79 [2019-10-13 17:43:49,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:49,051 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 143 transitions. [2019-10-13 17:43:49,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 17:43:49,051 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 143 transitions. [2019-10-13 17:43:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-10-13 17:43:49,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:49,052 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:49,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:49,253 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:49,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1674935505, now seen corresponding path program 18 times [2019-10-13 17:43:49,254 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:49,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240959981] [2019-10-13 17:43:49,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:49,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:49,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-13 17:43:49,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240959981] [2019-10-13 17:43:49,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099178060] [2019-10-13 17:43:49,498 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 17:43:49,885 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-13 17:43:49,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:49,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 17:43:49,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-13 17:43:49,923 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:49,923 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-10-13 17:43:49,923 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894556934] [2019-10-13 17:43:49,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 17:43:49,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 17:43:49,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:43:49,928 INFO L87 Difference]: Start difference. First operand 119 states and 143 transitions. Second operand 23 states. [2019-10-13 17:43:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:50,101 INFO L93 Difference]: Finished difference Result 198 states and 246 transitions. [2019-10-13 17:43:50,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 17:43:50,103 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2019-10-13 17:43:50,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:50,103 INFO L225 Difference]: With dead ends: 198 [2019-10-13 17:43:50,103 INFO L226 Difference]: Without dead ends: 122 [2019-10-13 17:43:50,104 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:43:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-13 17:43:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2019-10-13 17:43:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-13 17:43:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2019-10-13 17:43:50,109 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 84 [2019-10-13 17:43:50,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:50,109 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2019-10-13 17:43:50,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 17:43:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2019-10-13 17:43:50,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 17:43:50,110 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:50,110 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:50,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:50,315 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:50,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:50,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1933852497, now seen corresponding path program 19 times [2019-10-13 17:43:50,315 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:50,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979163359] [2019-10-13 17:43:50,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:50,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:50,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-13 17:43:50,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979163359] [2019-10-13 17:43:50,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952875375] [2019-10-13 17:43:50,583 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 17:43:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:50,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 17:43:50,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-13 17:43:50,670 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:50,670 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-13 17:43:50,670 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639857367] [2019-10-13 17:43:50,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:43:50,671 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:50,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:43:50,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:43:50,671 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand 24 states. [2019-10-13 17:43:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:50,800 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2019-10-13 17:43:50,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:43:50,801 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2019-10-13 17:43:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:50,802 INFO L225 Difference]: With dead ends: 200 [2019-10-13 17:43:50,802 INFO L226 Difference]: Without dead ends: 124 [2019-10-13 17:43:50,803 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 87 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 17:43:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-10-13 17:43:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2019-10-13 17:43:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-10-13 17:43:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 147 transitions. [2019-10-13 17:43:50,809 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 147 transitions. Word has length 86 [2019-10-13 17:43:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:50,809 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 147 transitions. [2019-10-13 17:43:50,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:43:50,810 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 147 transitions. [2019-10-13 17:43:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 17:43:50,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:50,811 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:51,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:51,016 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:51,016 INFO L82 PathProgramCache]: Analyzing trace with hash -354452749, now seen corresponding path program 20 times [2019-10-13 17:43:51,016 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:51,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318513902] [2019-10-13 17:43:51,016 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:51,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:51,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-13 17:43:51,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318513902] [2019-10-13 17:43:51,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097998704] [2019-10-13 17:43:51,293 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 17:43:51,364 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:51,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:51,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:43:51,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-13 17:43:51,387 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:51,387 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-13 17:43:51,387 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272538647] [2019-10-13 17:43:51,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:43:51,388 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:51,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:43:51,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:43:51,388 INFO L87 Difference]: Start difference. First operand 123 states and 147 transitions. Second operand 25 states. [2019-10-13 17:43:51,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:51,535 INFO L93 Difference]: Finished difference Result 202 states and 250 transitions. [2019-10-13 17:43:51,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:43:51,535 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 88 [2019-10-13 17:43:51,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:51,537 INFO L225 Difference]: With dead ends: 202 [2019-10-13 17:43:51,537 INFO L226 Difference]: Without dead ends: 126 [2019-10-13 17:43:51,538 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 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 17:43:51,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-13 17:43:51,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2019-10-13 17:43:51,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-13 17:43:51,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2019-10-13 17:43:51,543 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 88 [2019-10-13 17:43:51,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:51,544 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2019-10-13 17:43:51,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:43:51,544 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2019-10-13 17:43:51,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 17:43:51,545 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:51,545 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:51,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:51,749 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:51,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:51,749 INFO L82 PathProgramCache]: Analyzing trace with hash -392538603, now seen corresponding path program 21 times [2019-10-13 17:43:51,750 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:51,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215638476] [2019-10-13 17:43:51,750 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:51,751 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:51,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-10-13 17:43:52,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215638476] [2019-10-13 17:43:52,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692677552] [2019-10-13 17:43:52,033 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 17:43:52,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-13 17:43:52,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:52,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:43:52,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-13 17:43:52,397 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:52,397 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2019-10-13 17:43:52,398 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265679939] [2019-10-13 17:43:52,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 17:43:52,398 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:52,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 17:43:52,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:43:52,399 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand 36 states. [2019-10-13 17:43:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:52,680 INFO L93 Difference]: Finished difference Result 214 states and 268 transitions. [2019-10-13 17:43:52,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 17:43:52,680 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 90 [2019-10-13 17:43:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:52,682 INFO L225 Difference]: With dead ends: 214 [2019-10-13 17:43:52,682 INFO L226 Difference]: Without dead ends: 138 [2019-10-13 17:43:52,683 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:43:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-10-13 17:43:52,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2019-10-13 17:43:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-10-13 17:43:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 159 transitions. [2019-10-13 17:43:52,688 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 159 transitions. Word has length 90 [2019-10-13 17:43:52,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:52,688 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 159 transitions. [2019-10-13 17:43:52,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 17:43:52,688 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 159 transitions. [2019-10-13 17:43:52,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 17:43:52,689 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:52,689 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:52,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:52,890 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:52,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:52,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1768371632, now seen corresponding path program 22 times [2019-10-13 17:43:52,891 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:52,891 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911146216] [2019-10-13 17:43:52,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:52,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:52,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-10-13 17:43:53,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911146216] [2019-10-13 17:43:53,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352139990] [2019-10-13 17:43:53,183 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 17:43:53,264 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:53,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:53,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 17:43:53,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-10-13 17:43:53,285 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:53,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-13 17:43:53,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127372455] [2019-10-13 17:43:53,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 17:43:53,286 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:53,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 17:43:53,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:43:53,287 INFO L87 Difference]: Start difference. First operand 133 states and 159 transitions. Second operand 27 states. [2019-10-13 17:43:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:53,472 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2019-10-13 17:43:53,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 17:43:53,472 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 95 [2019-10-13 17:43:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:53,473 INFO L225 Difference]: With dead ends: 218 [2019-10-13 17:43:53,473 INFO L226 Difference]: Without dead ends: 136 [2019-10-13 17:43:53,474 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 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 17:43:53,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-10-13 17:43:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2019-10-13 17:43:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-10-13 17:43:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 161 transitions. [2019-10-13 17:43:53,478 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 161 transitions. Word has length 95 [2019-10-13 17:43:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:53,478 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 161 transitions. [2019-10-13 17:43:53,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 17:43:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 161 transitions. [2019-10-13 17:43:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-13 17:43:53,479 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:53,479 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:53,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:53,682 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:53,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:53,683 INFO L82 PathProgramCache]: Analyzing trace with hash -742920114, now seen corresponding path program 23 times [2019-10-13 17:43:53,683 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:53,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609122544] [2019-10-13 17:43:53,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:53,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:53,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-10-13 17:43:53,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609122544] [2019-10-13 17:43:53,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974122054] [2019-10-13 17:43:53,970 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 17:43:54,555 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-13 17:43:54,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:54,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:43:54,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-10-13 17:43:54,778 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:54,778 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 39 [2019-10-13 17:43:54,778 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598029462] [2019-10-13 17:43:54,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-13 17:43:54,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:54,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-13 17:43:54,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 17:43:54,779 INFO L87 Difference]: Start difference. First operand 135 states and 161 transitions. Second operand 39 states. [2019-10-13 17:43:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:55,060 INFO L93 Difference]: Finished difference Result 230 states and 288 transitions. [2019-10-13 17:43:55,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-13 17:43:55,060 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 97 [2019-10-13 17:43:55,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:55,062 INFO L225 Difference]: With dead ends: 230 [2019-10-13 17:43:55,062 INFO L226 Difference]: Without dead ends: 148 [2019-10-13 17:43:55,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 17:43:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-10-13 17:43:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2019-10-13 17:43:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-13 17:43:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 171 transitions. [2019-10-13 17:43:55,067 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 171 transitions. Word has length 97 [2019-10-13 17:43:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:55,068 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 171 transitions. [2019-10-13 17:43:55,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-13 17:43:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 171 transitions. [2019-10-13 17:43:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 17:43:55,069 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:55,069 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:55,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:55,275 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:55,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:55,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1743015205, now seen corresponding path program 24 times [2019-10-13 17:43:55,276 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:55,276 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498308065] [2019-10-13 17:43:55,276 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:55,276 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:55,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-13 17:43:55,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498308065] [2019-10-13 17:43:55,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410489117] [2019-10-13 17:43:55,665 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 17:43:56,884 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-13 17:43:56,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:56,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 17:43:56,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-13 17:43:56,925 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:56,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-10-13 17:43:56,925 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811957760] [2019-10-13 17:43:56,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-13 17:43:56,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:56,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-13 17:43:56,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:43:56,927 INFO L87 Difference]: Start difference. First operand 143 states and 171 transitions. Second operand 29 states. [2019-10-13 17:43:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:57,101 INFO L93 Difference]: Finished difference Result 234 states and 290 transitions. [2019-10-13 17:43:57,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-13 17:43:57,102 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 102 [2019-10-13 17:43:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:57,103 INFO L225 Difference]: With dead ends: 234 [2019-10-13 17:43:57,103 INFO L226 Difference]: Without dead ends: 146 [2019-10-13 17:43:57,104 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:43:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-13 17:43:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-10-13 17:43:57,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-13 17:43:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 173 transitions. [2019-10-13 17:43:57,110 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 173 transitions. Word has length 102 [2019-10-13 17:43:57,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:57,110 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 173 transitions. [2019-10-13 17:43:57,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-13 17:43:57,110 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 173 transitions. [2019-10-13 17:43:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-13 17:43:57,111 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:57,111 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:57,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:57,317 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:57,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1419810179, now seen corresponding path program 25 times [2019-10-13 17:43:57,318 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:57,318 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720661577] [2019-10-13 17:43:57,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:57,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:57,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-13 17:43:57,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720661577] [2019-10-13 17:43:57,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121774664] [2019-10-13 17:43:57,686 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 17:43:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:57,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 17:43:57,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-13 17:43:57,803 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:57,803 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-13 17:43:57,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187447997] [2019-10-13 17:43:57,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:43:57,804 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:57,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:43:57,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:43:57,805 INFO L87 Difference]: Start difference. First operand 145 states and 173 transitions. Second operand 30 states. [2019-10-13 17:43:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:57,993 INFO L93 Difference]: Finished difference Result 236 states and 292 transitions. [2019-10-13 17:43:57,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:43:57,994 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 104 [2019-10-13 17:43:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:57,995 INFO L225 Difference]: With dead ends: 236 [2019-10-13 17:43:57,995 INFO L226 Difference]: Without dead ends: 148 [2019-10-13 17:43:57,996 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 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 17:43:57,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-10-13 17:43:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2019-10-13 17:43:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-10-13 17:43:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 175 transitions. [2019-10-13 17:43:58,001 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 175 transitions. Word has length 104 [2019-10-13 17:43:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:58,002 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 175 transitions. [2019-10-13 17:43:58,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:43:58,002 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 175 transitions. [2019-10-13 17:43:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 17:43:58,002 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:58,003 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:58,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:58,207 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:58,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:58,207 INFO L82 PathProgramCache]: Analyzing trace with hash -57425505, now seen corresponding path program 26 times [2019-10-13 17:43:58,207 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:58,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109751452] [2019-10-13 17:43:58,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:58,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:58,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-13 17:43:58,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109751452] [2019-10-13 17:43:58,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058302181] [2019-10-13 17:43:58,635 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 17:43:58,731 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:58,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:58,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 17:43:58,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-13 17:43:58,760 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:58,760 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-13 17:43:58,760 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76337680] [2019-10-13 17:43:58,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 17:43:58,762 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:58,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 17:43:58,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:43:58,762 INFO L87 Difference]: Start difference. First operand 147 states and 175 transitions. Second operand 31 states. [2019-10-13 17:43:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:58,988 INFO L93 Difference]: Finished difference Result 238 states and 294 transitions. [2019-10-13 17:43:58,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:43:58,989 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 106 [2019-10-13 17:43:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:58,990 INFO L225 Difference]: With dead ends: 238 [2019-10-13 17:43:58,990 INFO L226 Difference]: Without dead ends: 150 [2019-10-13 17:43:58,991 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:43:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-10-13 17:43:58,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2019-10-13 17:43:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-10-13 17:43:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 177 transitions. [2019-10-13 17:43:58,997 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 177 transitions. Word has length 106 [2019-10-13 17:43:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:58,997 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 177 transitions. [2019-10-13 17:43:58,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 17:43:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 177 transitions. [2019-10-13 17:43:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 17:43:58,998 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:58,998 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:59,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:59,202 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:59,202 INFO L82 PathProgramCache]: Analyzing trace with hash -770779071, now seen corresponding path program 27 times [2019-10-13 17:43:59,203 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:59,203 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215240078] [2019-10-13 17:43:59,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:59,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:59,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-10-13 17:43:59,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215240078] [2019-10-13 17:43:59,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398597094] [2019-10-13 17:43:59,918 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 17:44:00,118 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-10-13 17:44:00,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:00,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 17:44:00,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-10-13 17:44:00,362 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:00,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15] total 44 [2019-10-13 17:44:00,362 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669787537] [2019-10-13 17:44:00,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-13 17:44:00,363 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:00,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-13 17:44:00,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=1351, Unknown=0, NotChecked=0, Total=1892 [2019-10-13 17:44:00,363 INFO L87 Difference]: Start difference. First operand 149 states and 177 transitions. Second operand 44 states. [2019-10-13 17:44:00,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:00,701 INFO L93 Difference]: Finished difference Result 250 states and 312 transitions. [2019-10-13 17:44:00,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-13 17:44:00,701 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 108 [2019-10-13 17:44:00,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:00,702 INFO L225 Difference]: With dead ends: 250 [2019-10-13 17:44:00,703 INFO L226 Difference]: Without dead ends: 162 [2019-10-13 17:44:00,704 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=541, Invalid=1351, Unknown=0, NotChecked=0, Total=1892 [2019-10-13 17:44:00,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-10-13 17:44:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2019-10-13 17:44:00,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-13 17:44:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 187 transitions. [2019-10-13 17:44:00,709 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 187 transitions. Word has length 108 [2019-10-13 17:44:00,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:00,709 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 187 transitions. [2019-10-13 17:44:00,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-13 17:44:00,709 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 187 transitions. [2019-10-13 17:44:00,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 17:44:00,710 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:00,710 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:00,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:00,915 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:00,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1597532292, now seen corresponding path program 28 times [2019-10-13 17:44:00,916 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:00,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508561920] [2019-10-13 17:44:00,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:00,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:00,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-10-13 17:44:01,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508561920] [2019-10-13 17:44:01,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133468260] [2019-10-13 17:44:01,325 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 17:44:01,417 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:44:01,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:01,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-13 17:44:01,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-10-13 17:44:01,439 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:01,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-13 17:44:01,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110914017] [2019-10-13 17:44:01,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 17:44:01,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:01,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 17:44:01,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:44:01,440 INFO L87 Difference]: Start difference. First operand 157 states and 187 transitions. Second operand 33 states. [2019-10-13 17:44:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:01,626 INFO L93 Difference]: Finished difference Result 254 states and 314 transitions. [2019-10-13 17:44:01,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 17:44:01,627 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 113 [2019-10-13 17:44:01,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:01,628 INFO L225 Difference]: With dead ends: 254 [2019-10-13 17:44:01,628 INFO L226 Difference]: Without dead ends: 160 [2019-10-13 17:44:01,629 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:44:01,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-10-13 17:44:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2019-10-13 17:44:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-10-13 17:44:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 189 transitions. [2019-10-13 17:44:01,637 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 189 transitions. Word has length 113 [2019-10-13 17:44:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:01,637 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 189 transitions. [2019-10-13 17:44:01,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 17:44:01,638 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 189 transitions. [2019-10-13 17:44:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 17:44:01,639 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:01,639 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:01,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:01,843 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:01,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:01,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1883834462, now seen corresponding path program 29 times [2019-10-13 17:44:01,844 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:01,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693030727] [2019-10-13 17:44:01,845 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:01,845 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:01,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-10-13 17:44:02,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693030727] [2019-10-13 17:44:02,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633396409] [2019-10-13 17:44:02,463 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 17:44:03,632 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2019-10-13 17:44:03,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:03,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:44:03,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-10-13 17:44:03,911 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:03,911 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 16] total 47 [2019-10-13 17:44:03,911 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476084486] [2019-10-13 17:44:03,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-10-13 17:44:03,912 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:03,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-10-13 17:44:03,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2019-10-13 17:44:03,913 INFO L87 Difference]: Start difference. First operand 159 states and 189 transitions. Second operand 47 states. [2019-10-13 17:44:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:04,177 INFO L93 Difference]: Finished difference Result 266 states and 332 transitions. [2019-10-13 17:44:04,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-10-13 17:44:04,178 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 115 [2019-10-13 17:44:04,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:04,179 INFO L225 Difference]: With dead ends: 266 [2019-10-13 17:44:04,179 INFO L226 Difference]: Without dead ends: 172 [2019-10-13 17:44:04,181 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2019-10-13 17:44:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-10-13 17:44:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2019-10-13 17:44:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-10-13 17:44:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 199 transitions. [2019-10-13 17:44:04,186 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 199 transitions. Word has length 115 [2019-10-13 17:44:04,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:04,186 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 199 transitions. [2019-10-13 17:44:04,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-10-13 17:44:04,186 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 199 transitions. [2019-10-13 17:44:04,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 17:44:04,187 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:04,187 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:04,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:04,394 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:04,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:04,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1764460921, now seen corresponding path program 30 times [2019-10-13 17:44:04,395 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:04,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651487100] [2019-10-13 17:44:04,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:04,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:04,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-13 17:44:04,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651487100] [2019-10-13 17:44:04,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652219229] [2019-10-13 17:44:04,866 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 17:44:08,109 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-10-13 17:44:08,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:08,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-13 17:44:08,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-13 17:44:08,177 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:08,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2019-10-13 17:44:08,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386299108] [2019-10-13 17:44:08,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-13 17:44:08,178 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:08,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-13 17:44:08,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 17:44:08,179 INFO L87 Difference]: Start difference. First operand 167 states and 199 transitions. Second operand 35 states. [2019-10-13 17:44:08,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:08,441 INFO L93 Difference]: Finished difference Result 270 states and 334 transitions. [2019-10-13 17:44:08,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-13 17:44:08,442 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2019-10-13 17:44:08,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:08,443 INFO L225 Difference]: With dead ends: 270 [2019-10-13 17:44:08,444 INFO L226 Difference]: Without dead ends: 170 [2019-10-13 17:44:08,445 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 17:44:08,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-10-13 17:44:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-10-13 17:44:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-10-13 17:44:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 201 transitions. [2019-10-13 17:44:08,453 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 201 transitions. Word has length 120 [2019-10-13 17:44:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:08,453 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 201 transitions. [2019-10-13 17:44:08,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-13 17:44:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 201 transitions. [2019-10-13 17:44:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 17:44:08,455 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:08,456 INFO L380 BasicCegarLoop]: trace histogram [31, 31, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:08,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:08,664 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:08,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1896499625, now seen corresponding path program 31 times [2019-10-13 17:44:08,666 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:08,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291563465] [2019-10-13 17:44:08,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:08,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:08,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-13 17:44:09,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291563465] [2019-10-13 17:44:09,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038793354] [2019-10-13 17:44:09,372 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 17:44:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:09,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-13 17:44:09,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-13 17:44:09,499 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:09,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-10-13 17:44:09,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643400414] [2019-10-13 17:44:09,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 17:44:09,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:09,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 17:44:09,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:44:09,500 INFO L87 Difference]: Start difference. First operand 169 states and 201 transitions. Second operand 36 states. [2019-10-13 17:44:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:09,764 INFO L93 Difference]: Finished difference Result 272 states and 336 transitions. [2019-10-13 17:44:09,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-13 17:44:09,764 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 122 [2019-10-13 17:44:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:09,766 INFO L225 Difference]: With dead ends: 272 [2019-10-13 17:44:09,766 INFO L226 Difference]: Without dead ends: 172 [2019-10-13 17:44:09,767 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:44:09,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-10-13 17:44:09,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2019-10-13 17:44:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-10-13 17:44:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 203 transitions. [2019-10-13 17:44:09,772 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 203 transitions. Word has length 122 [2019-10-13 17:44:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:09,772 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 203 transitions. [2019-10-13 17:44:09,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 17:44:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 203 transitions. [2019-10-13 17:44:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 17:44:09,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:09,773 INFO L380 BasicCegarLoop]: trace histogram [32, 32, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:09,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:09,977 INFO L410 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:09,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1793598389, now seen corresponding path program 32 times [2019-10-13 17:44:09,978 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:09,978 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062495126] [2019-10-13 17:44:09,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:09,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:09,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-13 17:44:10,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062495126] [2019-10-13 17:44:10,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934211516] [2019-10-13 17:44:10,636 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 17:44:10,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:44:10,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:10,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-13 17:44:10,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-13 17:44:10,827 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:10,827 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-10-13 17:44:10,827 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127767888] [2019-10-13 17:44:10,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-13 17:44:10,830 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:10,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-13 17:44:10,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:44:10,831 INFO L87 Difference]: Start difference. First operand 171 states and 203 transitions. Second operand 37 states. [2019-10-13 17:44:11,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:11,083 INFO L93 Difference]: Finished difference Result 274 states and 338 transitions. [2019-10-13 17:44:11,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 17:44:11,083 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 124 [2019-10-13 17:44:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:11,084 INFO L225 Difference]: With dead ends: 274 [2019-10-13 17:44:11,085 INFO L226 Difference]: Without dead ends: 174 [2019-10-13 17:44:11,085 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:44:11,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-10-13 17:44:11,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2019-10-13 17:44:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-10-13 17:44:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 205 transitions. [2019-10-13 17:44:11,090 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 205 transitions. Word has length 124 [2019-10-13 17:44:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:11,090 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 205 transitions. [2019-10-13 17:44:11,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-13 17:44:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 205 transitions. [2019-10-13 17:44:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 17:44:11,091 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:11,092 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:11,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:11,296 INFO L410 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:11,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:11,296 INFO L82 PathProgramCache]: Analyzing trace with hash -334803347, now seen corresponding path program 33 times [2019-10-13 17:44:11,297 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:11,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946290321] [2019-10-13 17:44:11,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:11,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:11,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-13 17:44:11,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946290321] [2019-10-13 17:44:11,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695073739] [2019-10-13 17:44:11,857 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 17:44:12,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-13 17:44:12,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:12,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:44:12,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-10-13 17:44:12,485 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:12,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 17] total 52 [2019-10-13 17:44:12,486 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560213503] [2019-10-13 17:44:12,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-10-13 17:44:12,486 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:12,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-10-13 17:44:12,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=1885, Unknown=0, NotChecked=0, Total=2652 [2019-10-13 17:44:12,487 INFO L87 Difference]: Start difference. First operand 173 states and 205 transitions. Second operand 52 states. [2019-10-13 17:44:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:12,946 INFO L93 Difference]: Finished difference Result 286 states and 356 transitions. [2019-10-13 17:44:12,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-10-13 17:44:12,947 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 126 [2019-10-13 17:44:12,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:12,949 INFO L225 Difference]: With dead ends: 286 [2019-10-13 17:44:12,949 INFO L226 Difference]: Without dead ends: 186 [2019-10-13 17:44:12,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=767, Invalid=1885, Unknown=0, NotChecked=0, Total=2652 [2019-10-13 17:44:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-10-13 17:44:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 181. [2019-10-13 17:44:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-10-13 17:44:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2019-10-13 17:44:12,956 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 126 [2019-10-13 17:44:12,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:12,957 INFO L462 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2019-10-13 17:44:12,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-10-13 17:44:12,957 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2019-10-13 17:44:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 17:44:12,958 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:12,958 INFO L380 BasicCegarLoop]: trace histogram [34, 34, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:13,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:13,163 INFO L410 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:13,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:13,163 INFO L82 PathProgramCache]: Analyzing trace with hash 912852824, now seen corresponding path program 34 times [2019-10-13 17:44:13,163 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:13,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527162268] [2019-10-13 17:44:13,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:13,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:13,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1487 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-13 17:44:13,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527162268] [2019-10-13 17:44:13,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882906518] [2019-10-13 17:44:13,703 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 17:44:13,813 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:44:13,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:13,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-13 17:44:13,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1487 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-13 17:44:13,842 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:13,842 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2019-10-13 17:44:13,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673389708] [2019-10-13 17:44:13,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-13 17:44:13,843 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:13,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-13 17:44:13,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 17:44:13,844 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand 39 states. [2019-10-13 17:44:14,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:14,074 INFO L93 Difference]: Finished difference Result 290 states and 358 transitions. [2019-10-13 17:44:14,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-13 17:44:14,075 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 131 [2019-10-13 17:44:14,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:14,076 INFO L225 Difference]: With dead ends: 290 [2019-10-13 17:44:14,076 INFO L226 Difference]: Without dead ends: 184 [2019-10-13 17:44:14,077 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 17:44:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-10-13 17:44:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2019-10-13 17:44:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-10-13 17:44:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 217 transitions. [2019-10-13 17:44:14,084 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 217 transitions. Word has length 131 [2019-10-13 17:44:14,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:14,084 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 217 transitions. [2019-10-13 17:44:14,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-13 17:44:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 217 transitions. [2019-10-13 17:44:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 17:44:14,085 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:14,085 INFO L380 BasicCegarLoop]: trace histogram [35, 35, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:14,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:14,290 INFO L410 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:14,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:14,293 INFO L82 PathProgramCache]: Analyzing trace with hash -906409226, now seen corresponding path program 35 times [2019-10-13 17:44:14,293 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:14,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786710410] [2019-10-13 17:44:14,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:14,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:14,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1556 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-13 17:44:14,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786710410] [2019-10-13 17:44:14,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536229064] [2019-10-13 17:44:14,892 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