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/standard_copyInitSum2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:44:10,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:44:10,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:44:10,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:44:10,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:44:10,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:44:10,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:44:10,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:44:10,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:44:10,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:44:10,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:44:10,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:44:10,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:44:10,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:44:10,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:44:10,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:44:10,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:44:10,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:44:10,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:44:10,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:44:10,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:44:10,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:44:10,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:44:10,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:44:10,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:44:10,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:44:10,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:44:10,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:44:10,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:44:10,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:44:10,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:44:10,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:44:10,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:44:10,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:44:10,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:44:10,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:44:10,355 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:44:10,384 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:44:10,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:44:10,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:44:10,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:44:10,386 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:44:10,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:44:10,387 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:44:10,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:44:10,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:44:10,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:44:10,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:44:10,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:44:10,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:44:10,389 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:44:10,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:44:10,390 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:44:10,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:44:10,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:44:10,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:44:10,391 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:44:10,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:44:10,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:10,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:44:10,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:44:10,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:44:10,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:44:10,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:44:10,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:44:10,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:44:10,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:44:10,688 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:44:10,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:44:10,693 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:44:10,694 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:44:10,694 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2019-10-14 21:44:10,763 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8861b09d5/884ca4ddb9ce40109cc1d99fac5070b3/FLAG62eda77e4 [2019-10-14 21:44:11,222 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:44:11,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-1.i [2019-10-14 21:44:11,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8861b09d5/884ca4ddb9ce40109cc1d99fac5070b3/FLAG62eda77e4 [2019-10-14 21:44:11,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8861b09d5/884ca4ddb9ce40109cc1d99fac5070b3 [2019-10-14 21:44:11,588 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:44:11,590 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:44:11,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:11,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:44:11,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:44:11,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:11,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@931e348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11, skipping insertion in model container [2019-10-14 21:44:11,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:11,608 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:44:11,631 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:44:11,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:11,872 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:44:11,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:11,911 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:44:11,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11 WrapperNode [2019-10-14 21:44:11,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:11,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:44:11,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:44:11,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:44:12,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:12,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:12,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:12,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:12,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:12,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:12,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... [2019-10-14 21:44:12,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:44:12,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:44:12,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:44:12,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:44:12,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:12,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:44:12,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:44:12,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:44:12,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:44:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:44:12,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:44:12,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:44:12,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:44:12,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:44:12,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:44:12,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:44:12,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:44:12,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:44:12,373 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:44:12,374 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 21:44:12,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:12 BoogieIcfgContainer [2019-10-14 21:44:12,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:44:12,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:44:12,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:44:12,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:44:12,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:44:11" (1/3) ... [2019-10-14 21:44:12,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c00b4a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:12, skipping insertion in model container [2019-10-14 21:44:12,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:11" (2/3) ... [2019-10-14 21:44:12,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c00b4a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:12, skipping insertion in model container [2019-10-14 21:44:12,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:12" (3/3) ... [2019-10-14 21:44:12,403 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-1.i [2019-10-14 21:44:12,414 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:44:12,428 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:44:12,451 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:44:12,487 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:44:12,487 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:44:12,487 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:44:12,487 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:44:12,488 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:44:12,488 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:44:12,488 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:44:12,488 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:44:12,503 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-14 21:44:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:44:12,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:12,510 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:12,512 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:12,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:12,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1001985310, now seen corresponding path program 1 times [2019-10-14 21:44:12,528 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:12,528 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904489588] [2019-10-14 21:44:12,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:12,529 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:12,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:12,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904489588] [2019-10-14 21:44:12,692 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:12,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:44:12,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190853005] [2019-10-14 21:44:12,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:44:12,697 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:12,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:44:12,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:44:12,714 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-10-14 21:44:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:12,830 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2019-10-14 21:44:12,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:44:12,832 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-14 21:44:12,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:12,839 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:44:12,839 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:44:12,842 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 [2019-10-14 21:44:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:44:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 21:44:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:44:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-10-14 21:44:12,877 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2019-10-14 21:44:12,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:12,878 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-10-14 21:44:12,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:44:12,878 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-10-14 21:44:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:44:12,879 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:12,880 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:12,880 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:12,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:12,881 INFO L82 PathProgramCache]: Analyzing trace with hash -400143846, now seen corresponding path program 1 times [2019-10-14 21:44:12,881 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:12,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569711110] [2019-10-14 21:44:12,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:12,882 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:12,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:12,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569711110] [2019-10-14 21:44:12,957 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:12,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:44:12,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426756552] [2019-10-14 21:44:12,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:44:12,959 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:12,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:44:12,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:12,960 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2019-10-14 21:44:13,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:13,071 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-14 21:44:13,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:44:13,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-14 21:44:13,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:13,073 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:44:13,073 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:44:13,075 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 [2019-10-14 21:44:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:44:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-10-14 21:44:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:44:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-14 21:44:13,083 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2019-10-14 21:44:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:13,084 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-14 21:44:13,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:44:13,084 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-14 21:44:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:44:13,085 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:13,085 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] [2019-10-14 21:44:13,085 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:13,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:13,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1150570790, now seen corresponding path program 1 times [2019-10-14 21:44:13,086 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:13,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092798055] [2019-10-14 21:44:13,087 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:13,087 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:13,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:44:13,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092798055] [2019-10-14 21:44:13,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99068929] [2019-10-14 21:44:13,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:13,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:44:13,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:44:13,304 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:13,305 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:44:13,305 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639619298] [2019-10-14 21:44:13,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:44:13,306 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:13,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:44:13,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:44:13,309 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2019-10-14 21:44:13,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:13,431 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2019-10-14 21:44:13,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:44:13,432 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-14 21:44:13,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:13,433 INFO L225 Difference]: With dead ends: 53 [2019-10-14 21:44:13,433 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:44:13,434 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:44:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:44:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-10-14 21:44:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:44:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-10-14 21:44:13,441 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2019-10-14 21:44:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:13,442 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-10-14 21:44:13,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:44:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-10-14 21:44:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:44:13,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:13,444 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:13,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:13,650 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:13,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1868122094, now seen corresponding path program 2 times [2019-10-14 21:44:13,651 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:13,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031867023] [2019-10-14 21:44:13,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:13,652 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:13,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:44:13,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031867023] [2019-10-14 21:44:13,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067135031] [2019-10-14 21:44:13,777 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 [2019-10-14 21:44:13,855 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:13,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:13,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:44:13,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:44:13,884 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:13,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:44:13,885 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100465347] [2019-10-14 21:44:13,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:44:13,886 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:13,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:44:13,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:13,887 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2019-10-14 21:44:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:14,007 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-10-14 21:44:14,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:44:14,008 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-10-14 21:44:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:14,009 INFO L225 Difference]: With dead ends: 62 [2019-10-14 21:44:14,009 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:44:14,010 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:44:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-10-14 21:44:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:44:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2019-10-14 21:44:14,018 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2019-10-14 21:44:14,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:14,018 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2019-10-14 21:44:14,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:44:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2019-10-14 21:44:14,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:44:14,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:14,020 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:14,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:14,221 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash 150752210, now seen corresponding path program 3 times [2019-10-14 21:44:14,221 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:14,222 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009552608] [2019-10-14 21:44:14,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:14,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:14,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:44:14,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009552608] [2019-10-14 21:44:14,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384723568] [2019-10-14 21:44:14,330 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 [2019-10-14 21:44:14,390 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:44:14,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:14,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:44:14,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:44:14,415 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:14,415 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:44:14,416 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225238330] [2019-10-14 21:44:14,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:44:14,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:14,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:44:14,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:14,419 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 8 states. [2019-10-14 21:44:14,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:14,559 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2019-10-14 21:44:14,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:44:14,559 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-10-14 21:44:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:14,560 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:44:14,560 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:44:14,563 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:44:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-10-14 21:44:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:44:14,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-10-14 21:44:14,577 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2019-10-14 21:44:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:14,578 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-10-14 21:44:14,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:44:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-10-14 21:44:14,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:44:14,584 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:14,584 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:14,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:14,789 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:14,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:14,789 INFO L82 PathProgramCache]: Analyzing trace with hash -125121014, now seen corresponding path program 4 times [2019-10-14 21:44:14,790 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:14,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131516913] [2019-10-14 21:44:14,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:14,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:14,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-14 21:44:14,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131516913] [2019-10-14 21:44:14,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336786344] [2019-10-14 21:44:14,899 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 [2019-10-14 21:44:14,945 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:14,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:14,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:44:14,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:44:14,965 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:14,965 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:44:14,965 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873321026] [2019-10-14 21:44:14,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:44:14,966 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:14,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:44:14,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:14,967 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 9 states. [2019-10-14 21:44:15,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:15,071 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-14 21:44:15,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:44:15,072 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-10-14 21:44:15,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:15,073 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:44:15,073 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:44:15,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:44:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-10-14 21:44:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:44:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-10-14 21:44:15,082 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2019-10-14 21:44:15,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:15,083 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-10-14 21:44:15,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:44:15,083 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-10-14 21:44:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:44:15,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:15,085 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:15,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:15,289 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:15,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:15,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1558523702, now seen corresponding path program 5 times [2019-10-14 21:44:15,290 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:15,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034403241] [2019-10-14 21:44:15,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:15,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:15,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-14 21:44:15,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034403241] [2019-10-14 21:44:15,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197453114] [2019-10-14 21:44:15,403 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 [2019-10-14 21:44:15,722 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:44:15,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:15,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:44:15,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:44:15,744 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:15,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:44:15,745 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214206274] [2019-10-14 21:44:15,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:44:15,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:15,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:44:15,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:15,747 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 10 states. [2019-10-14 21:44:15,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:15,927 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2019-10-14 21:44:15,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:44:15,928 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2019-10-14 21:44:15,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:15,929 INFO L225 Difference]: With dead ends: 89 [2019-10-14 21:44:15,929 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:44:15,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:44:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-10-14 21:44:15,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:44:15,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-10-14 21:44:15,940 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2019-10-14 21:44:15,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:15,940 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-10-14 21:44:15,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:44:15,940 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-10-14 21:44:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:44:15,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:15,942 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:16,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:16,147 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:16,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:16,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1349350398, now seen corresponding path program 6 times [2019-10-14 21:44:16,148 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:16,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701986181] [2019-10-14 21:44:16,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:16,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:16,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:44:16,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701986181] [2019-10-14 21:44:16,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367900511] [2019-10-14 21:44:16,264 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 [2019-10-14 21:44:16,494 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:44:16,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:16,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:44:16,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-14 21:44:16,521 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:16,521 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:44:16,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321011574] [2019-10-14 21:44:16,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:44:16,522 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:16,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:44:16,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:44:16,523 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 11 states. [2019-10-14 21:44:16,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:16,680 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2019-10-14 21:44:16,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:44:16,681 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2019-10-14 21:44:16,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:16,683 INFO L225 Difference]: With dead ends: 98 [2019-10-14 21:44:16,684 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:44:16,685 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:44:16,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:44:16,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-14 21:44:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:44:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2019-10-14 21:44:16,697 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2019-10-14 21:44:16,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:16,697 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2019-10-14 21:44:16,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:44:16,698 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2019-10-14 21:44:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:44:16,702 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:16,702 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:16,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:16,903 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:16,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:16,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1128841790, now seen corresponding path program 7 times [2019-10-14 21:44:16,904 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:16,904 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157883665] [2019-10-14 21:44:16,905 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:16,905 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:16,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-14 21:44:17,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157883665] [2019-10-14 21:44:17,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72879057] [2019-10-14 21:44:17,066 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 [2019-10-14 21:44:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:17,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:44:17,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-14 21:44:17,157 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:17,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:44:17,158 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362602789] [2019-10-14 21:44:17,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:44:17,158 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:17,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:44:17,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:17,159 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 12 states. [2019-10-14 21:44:17,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:17,331 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2019-10-14 21:44:17,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:44:17,332 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2019-10-14 21:44:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:17,333 INFO L225 Difference]: With dead ends: 107 [2019-10-14 21:44:17,333 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:44:17,334 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:44:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-10-14 21:44:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:44:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2019-10-14 21:44:17,341 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 52 [2019-10-14 21:44:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:17,341 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2019-10-14 21:44:17,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:44:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2019-10-14 21:44:17,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 21:44:17,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:17,343 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:17,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:17,545 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:17,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:17,546 INFO L82 PathProgramCache]: Analyzing trace with hash -612503046, now seen corresponding path program 8 times [2019-10-14 21:44:17,547 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:17,547 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924247002] [2019-10-14 21:44:17,547 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:17,548 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:17,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-14 21:44:17,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924247002] [2019-10-14 21:44:17,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239132342] [2019-10-14 21:44:17,727 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 [2019-10-14 21:44:17,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:17,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:17,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:44:17,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-14 21:44:17,817 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:17,818 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:44:17,818 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349038918] [2019-10-14 21:44:17,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:44:17,819 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:17,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:44:17,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:44:17,820 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 13 states. [2019-10-14 21:44:17,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:17,969 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2019-10-14 21:44:17,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:44:17,970 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2019-10-14 21:44:17,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:17,971 INFO L225 Difference]: With dead ends: 116 [2019-10-14 21:44:17,971 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 21:44:17,972 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:44:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 21:44:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-10-14 21:44:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-14 21:44:17,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2019-10-14 21:44:17,979 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2019-10-14 21:44:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:17,979 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2019-10-14 21:44:17,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:44:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2019-10-14 21:44:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 21:44:17,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:17,981 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:18,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:18,185 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:18,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:18,185 INFO L82 PathProgramCache]: Analyzing trace with hash -490630470, now seen corresponding path program 9 times [2019-10-14 21:44:18,186 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:18,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278349370] [2019-10-14 21:44:18,186 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:18,186 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:18,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-14 21:44:18,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278349370] [2019-10-14 21:44:18,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502372020] [2019-10-14 21:44:18,319 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 [2019-10-14 21:44:18,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:44:18,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:18,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:44:18,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-14 21:44:18,804 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:18,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:44:18,805 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249869626] [2019-10-14 21:44:18,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:44:18,805 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:18,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:44:18,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:44:18,806 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 14 states. [2019-10-14 21:44:18,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:18,996 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2019-10-14 21:44:18,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:44:18,996 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2019-10-14 21:44:18,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:18,997 INFO L225 Difference]: With dead ends: 125 [2019-10-14 21:44:18,997 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:44:18,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:44:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:44:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2019-10-14 21:44:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:44:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2019-10-14 21:44:19,016 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 62 [2019-10-14 21:44:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:19,017 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2019-10-14 21:44:19,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:44:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2019-10-14 21:44:19,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:44:19,018 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:19,018 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:19,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:19,230 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:19,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:19,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1207107598, now seen corresponding path program 10 times [2019-10-14 21:44:19,231 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:19,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953222638] [2019-10-14 21:44:19,231 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:19,231 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:19,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-10-14 21:44:19,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953222638] [2019-10-14 21:44:19,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179945129] [2019-10-14 21:44:19,373 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 [2019-10-14 21:44:19,429 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:19,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:19,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:44:19,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-14 21:44:19,456 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:19,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:44:19,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964905603] [2019-10-14 21:44:19,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:44:19,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:19,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:44:19,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:44:19,458 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 15 states. [2019-10-14 21:44:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:19,625 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-10-14 21:44:19,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:44:19,625 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2019-10-14 21:44:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:19,626 INFO L225 Difference]: With dead ends: 134 [2019-10-14 21:44:19,626 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:44:19,627 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:44:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:44:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-14 21:44:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:44:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2019-10-14 21:44:19,633 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2019-10-14 21:44:19,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:19,633 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2019-10-14 21:44:19,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:44:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2019-10-14 21:44:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-14 21:44:19,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:19,635 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:19,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:19,846 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:19,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:19,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2083114930, now seen corresponding path program 11 times [2019-10-14 21:44:19,847 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:19,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250784621] [2019-10-14 21:44:19,850 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:19,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:19,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-10-14 21:44:20,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250784621] [2019-10-14 21:44:20,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112989241] [2019-10-14 21:44:20,011 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 [2019-10-14 21:44:52,350 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:44:52,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:52,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:44:52,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:44:52,393 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:52,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:44:52,394 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137436857] [2019-10-14 21:44:52,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:44:52,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:52,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:44:52,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:44:52,395 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 16 states. [2019-10-14 21:44:52,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:52,627 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2019-10-14 21:44:52,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:44:52,627 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2019-10-14 21:44:52,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:52,629 INFO L225 Difference]: With dead ends: 143 [2019-10-14 21:44:52,629 INFO L226 Difference]: Without dead ends: 84 [2019-10-14 21:44:52,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:44:52,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-14 21:44:52,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2019-10-14 21:44:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-14 21:44:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2019-10-14 21:44:52,641 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 72 [2019-10-14 21:44:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:52,641 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2019-10-14 21:44:52,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:44:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2019-10-14 21:44:52,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-14 21:44:52,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:52,642 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:52,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:52,855 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:52,856 INFO L82 PathProgramCache]: Analyzing trace with hash 385857002, now seen corresponding path program 12 times [2019-10-14 21:44:52,856 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:52,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335086133] [2019-10-14 21:44:52,857 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:52,857 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:52,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-10-14 21:44:53,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335086133] [2019-10-14 21:44:53,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585919141] [2019-10-14 21:44:53,013 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