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_init5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:45:05,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:45:05,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:45:05,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:45:05,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:45:05,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:45:05,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:45:05,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:45:05,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:45:05,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:45:05,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:45:05,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:45:05,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:45:05,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:45:05,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:45:05,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:45:05,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:45:05,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:45:05,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:45:05,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:45:05,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:45:05,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:45:05,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:45:05,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:45:05,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:45:05,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:45:05,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:45:05,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:45:05,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:45:05,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:45:05,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:45:05,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:45:05,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:45:05,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:45:05,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:45:05,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:45:05,321 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 21:45:05,345 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:45:05,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:45:05,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:45:05,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:45:05,347 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:45:05,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:45:05,347 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:45:05,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:45:05,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:45:05,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:45:05,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:45:05,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:45:05,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:45:05,349 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:45:05,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:45:05,349 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:45:05,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:45:05,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:45:05,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:45:05,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:45:05,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:45:05,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:05,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:45:05,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:45:05,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:45:05,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:45:05,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:45:05,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:45:05,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:45:05,657 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:45:05,671 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:45:05,674 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:45:05,676 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:45:05,676 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:45:05,677 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2019-10-14 21:45:05,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4599e5631/da8dd152ce62459eb4f3e0e0923d84ef/FLAG806e6f74f [2019-10-14 21:45:06,200 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:45:06,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2019-10-14 21:45:06,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4599e5631/da8dd152ce62459eb4f3e0e0923d84ef/FLAG806e6f74f [2019-10-14 21:45:06,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4599e5631/da8dd152ce62459eb4f3e0e0923d84ef [2019-10-14 21:45:06,622 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:45:06,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:45:06,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:06,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:45:06,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:45:06,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c6ea3f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06, skipping insertion in model container [2019-10-14 21:45:06,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,643 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:45:06,665 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:45:06,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:06,848 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:45:06,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:06,884 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:45:06,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06 WrapperNode [2019-10-14 21:45:06,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:06,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:45:06,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:45:06,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:45:06,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:07,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:07,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:45:07,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:45:07,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:45:07,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:45:07,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (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 21:45:07,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:45:07,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:45:07,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:45:07,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:45:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:45:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:45:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:45:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:45:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:45:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:45:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:45:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:45:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:45:07,305 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:45:07,305 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 21:45:07,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:07 BoogieIcfgContainer [2019-10-14 21:45:07,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:45:07,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:45:07,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:45:07,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:45:07,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:45:06" (1/3) ... [2019-10-14 21:45:07,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32bd5611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:07, skipping insertion in model container [2019-10-14 21:45:07,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (2/3) ... [2019-10-14 21:45:07,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32bd5611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:07, skipping insertion in model container [2019-10-14 21:45:07,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:07" (3/3) ... [2019-10-14 21:45:07,326 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-2.i [2019-10-14 21:45:07,354 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:45:07,361 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:45:07,374 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:45:07,397 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:45:07,398 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:45:07,398 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:45:07,398 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:45:07,398 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:45:07,398 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:45:07,398 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:45:07,399 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:45:07,413 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 21:45:07,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:45:07,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:07,420 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] [2019-10-14 21:45:07,422 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:07,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:07,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1721973062, now seen corresponding path program 1 times [2019-10-14 21:45:07,434 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:07,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947918828] [2019-10-14 21:45:07,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,612 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 21:45:07,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947918828] [2019-10-14 21:45:07,614 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:07,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:45:07,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065952360] [2019-10-14 21:45:07,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:45:07,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:07,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:45:07,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:07,631 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-14 21:45:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:07,747 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-10-14 21:45:07,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:45:07,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-10-14 21:45:07,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:07,758 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:45:07,758 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:45:07,762 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 21:45:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:45:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:45:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:45:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-14 21:45:07,808 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 21 [2019-10-14 21:45:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:07,808 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-14 21:45:07,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:45:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-14 21:45:07,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:45:07,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:07,810 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] [2019-10-14 21:45:07,811 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:07,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:07,812 INFO L82 PathProgramCache]: Analyzing trace with hash -13266878, now seen corresponding path program 1 times [2019-10-14 21:45:07,812 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:07,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310454139] [2019-10-14 21:45:07,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,920 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 21:45:07,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310454139] [2019-10-14 21:45:07,921 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:07,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:45:07,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600943742] [2019-10-14 21:45:07,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:45:07,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:07,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:45:07,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:07,927 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-10-14 21:45:08,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:08,084 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2019-10-14 21:45:08,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:45:08,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 21:45:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:08,086 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:45:08,087 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 21:45:08,088 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 21:45:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 21:45:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-14 21:45:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:45:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-10-14 21:45:08,104 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-10-14 21:45:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:08,105 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-10-14 21:45:08,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:45:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-10-14 21:45:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:45:08,109 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:08,110 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:08,110 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:08,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:08,111 INFO L82 PathProgramCache]: Analyzing trace with hash -927642988, now seen corresponding path program 1 times [2019-10-14 21:45:08,112 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:08,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486297836] [2019-10-14 21:45:08,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:08,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:08,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:45:08,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486297836] [2019-10-14 21:45:08,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855489595] [2019-10-14 21:45:08,268 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 21:45:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:08,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:45:08,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:45:08,396 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:08,397 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:45:08,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985155214] [2019-10-14 21:45:08,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:45:08,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:08,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:45:08,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:08,410 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2019-10-14 21:45:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:08,562 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2019-10-14 21:45:08,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:45:08,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-14 21:45:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:08,564 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:45:08,564 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:45:08,565 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 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 21:45:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:45:08,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-14 21:45:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:45:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-10-14 21:45:08,575 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2019-10-14 21:45:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:08,575 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-10-14 21:45:08,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:45:08,576 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-10-14 21:45:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:45:08,577 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:08,577 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, 1, 1, 1, 1] [2019-10-14 21:45:08,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:08,783 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:08,784 INFO L82 PathProgramCache]: Analyzing trace with hash -681366654, now seen corresponding path program 2 times [2019-10-14 21:45:08,784 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:08,785 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219539702] [2019-10-14 21:45:08,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:08,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:08,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:45:08,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219539702] [2019-10-14 21:45:08,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386246598] [2019-10-14 21:45:08,907 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:45:08,960 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:08,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:08,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:45:08,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:45:08,981 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:08,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:45:08,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933888817] [2019-10-14 21:45:08,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:45:08,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:08,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:45:08,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:08,985 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 7 states. [2019-10-14 21:45:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:09,116 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-10-14 21:45:09,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:45:09,116 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-10-14 21:45:09,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:09,117 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:45:09,118 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:45:09,118 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 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 21:45:09,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:45:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-14 21:45:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:45:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-10-14 21:45:09,126 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2019-10-14 21:45:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:09,127 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-10-14 21:45:09,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:45:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-10-14 21:45:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:45:09,128 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:09,128 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, 1, 1, 1, 1] [2019-10-14 21:45:09,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:09,337 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:09,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:09,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1000479276, now seen corresponding path program 3 times [2019-10-14 21:45:09,338 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:09,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716723579] [2019-10-14 21:45:09,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:09,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:09,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:45:09,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716723579] [2019-10-14 21:45:09,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407645410] [2019-10-14 21:45:09,462 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 21:45:09,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:45:09,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:09,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:45:09,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:45:09,548 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:09,548 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:45:09,548 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462718378] [2019-10-14 21:45:09,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:45:09,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:09,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:45:09,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:09,552 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 8 states. [2019-10-14 21:45:09,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:09,680 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2019-10-14 21:45:09,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:45:09,681 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2019-10-14 21:45:09,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:09,682 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:45:09,682 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:45:09,683 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 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 21:45:09,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:45:09,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 21:45:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:45:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2019-10-14 21:45:09,690 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 36 [2019-10-14 21:45:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:09,691 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2019-10-14 21:45:09,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:45:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2019-10-14 21:45:09,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:45:09,692 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:09,692 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, 1, 1, 1, 1] [2019-10-14 21:45:09,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:09,898 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:09,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:09,898 INFO L82 PathProgramCache]: Analyzing trace with hash 631314114, now seen corresponding path program 4 times [2019-10-14 21:45:09,898 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:09,899 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336786344] [2019-10-14 21:45:09,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:09,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:09,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:45:10,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336786344] [2019-10-14 21:45:10,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646960660] [2019-10-14 21:45:10,047 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 21:45:10,104 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:10,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:10,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:45:10,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:45:10,130 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:10,130 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:45:10,131 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931516117] [2019-10-14 21:45:10,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:45:10,132 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:10,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:45:10,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:10,132 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 9 states. [2019-10-14 21:45:10,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:10,291 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2019-10-14 21:45:10,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:45:10,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-10-14 21:45:10,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:10,293 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:45:10,293 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:45:10,294 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 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 21:45:10,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:45:10,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-14 21:45:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:45:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2019-10-14 21:45:10,302 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 41 [2019-10-14 21:45:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:10,302 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2019-10-14 21:45:10,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:45:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2019-10-14 21:45:10,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:45:10,304 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:10,304 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, 1, 1, 1, 1] [2019-10-14 21:45:10,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:10,508 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:10,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:10,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1809092332, now seen corresponding path program 5 times [2019-10-14 21:45:10,510 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:10,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217351840] [2019-10-14 21:45:10,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:10,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:10,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:45:10,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217351840] [2019-10-14 21:45:10,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881831809] [2019-10-14 21:45:10,682 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 21:45:11,212 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:45:11,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:11,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:45:11,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:45:11,240 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:11,240 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:45:11,240 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597741139] [2019-10-14 21:45:11,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:45:11,241 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:11,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:45:11,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:11,242 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 10 states. [2019-10-14 21:45:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:11,366 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2019-10-14 21:45:11,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:45:11,367 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2019-10-14 21:45:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:11,368 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:45:11,368 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 21:45:11,369 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 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 21:45:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 21:45:11,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-14 21:45:11,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:45:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2019-10-14 21:45:11,376 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 46 [2019-10-14 21:45:11,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:11,376 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2019-10-14 21:45:11,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:45:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2019-10-14 21:45:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:45:11,378 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:11,378 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, 1, 1, 1, 1] [2019-10-14 21:45:11,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:11,584 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:11,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2091864578, now seen corresponding path program 6 times [2019-10-14 21:45:11,585 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:11,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643404073] [2019-10-14 21:45:11,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-14 21:45:11,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643404073] [2019-10-14 21:45:11,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747787388] [2019-10-14 21:45:11,691 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 21:45:12,354 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:45:12,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:12,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:45:12,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-14 21:45:12,376 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:12,377 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:45:12,377 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425730969] [2019-10-14 21:45:12,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:45:12,378 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:45:12,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:12,381 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 11 states. [2019-10-14 21:45:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:12,550 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2019-10-14 21:45:12,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:45:12,550 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2019-10-14 21:45:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:12,551 INFO L225 Difference]: With dead ends: 104 [2019-10-14 21:45:12,551 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:45:12,552 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 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 21:45:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:45:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-10-14 21:45:12,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:45:12,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2019-10-14 21:45:12,560 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 51 [2019-10-14 21:45:12,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:12,561 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2019-10-14 21:45:12,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:45:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2019-10-14 21:45:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:45:12,562 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:12,562 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, 1, 1, 1, 1] [2019-10-14 21:45:12,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:12,769 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:12,769 INFO L82 PathProgramCache]: Analyzing trace with hash -591532972, now seen corresponding path program 7 times [2019-10-14 21:45:12,769 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:12,769 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27162703] [2019-10-14 21:45:12,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 21:45:12,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27162703] [2019-10-14 21:45:12,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978981883] [2019-10-14 21:45:12,922 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 21:45:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:45:12,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 21:45:13,020 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:13,020 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:45:13,021 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230670929] [2019-10-14 21:45:13,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:45:13,021 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:13,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:45:13,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:13,022 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 12 states. [2019-10-14 21:45:13,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:13,166 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2019-10-14 21:45:13,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:45:13,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2019-10-14 21:45:13,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:13,168 INFO L225 Difference]: With dead ends: 113 [2019-10-14 21:45:13,168 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:45:13,169 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 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 21:45:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:45:13,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-10-14 21:45:13,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 21:45:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2019-10-14 21:45:13,176 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 56 [2019-10-14 21:45:13,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:13,176 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2019-10-14 21:45:13,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:45:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2019-10-14 21:45:13,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:45:13,178 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:13,178 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, 1, 1, 1, 1] [2019-10-14 21:45:13,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:13,389 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash 642637122, now seen corresponding path program 8 times [2019-10-14 21:45:13,390 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:13,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497227252] [2019-10-14 21:45:13,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:45:13,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497227252] [2019-10-14 21:45:13,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512901505] [2019-10-14 21:45:13,538 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 21:45:13,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:13,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:13,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:45:13,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:45:13,629 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:13,630 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:45:13,630 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725003517] [2019-10-14 21:45:13,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:45:13,631 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:13,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:45:13,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:13,632 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 13 states. [2019-10-14 21:45:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:13,777 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2019-10-14 21:45:13,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:45:13,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2019-10-14 21:45:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:13,778 INFO L225 Difference]: With dead ends: 122 [2019-10-14 21:45:13,779 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:45:13,780 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 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 21:45:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:45:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-10-14 21:45:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:45:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2019-10-14 21:45:13,787 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 61 [2019-10-14 21:45:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:13,788 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2019-10-14 21:45:13,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:45:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2019-10-14 21:45:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:45:13,789 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:13,789 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, 1, 1, 1, 1] [2019-10-14 21:45:13,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:13,993 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:13,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1682614380, now seen corresponding path program 9 times [2019-10-14 21:45:13,994 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:13,994 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001131400] [2019-10-14 21:45:13,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 21:45:14,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001131400] [2019-10-14 21:45:14,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969338181] [2019-10-14 21:45:14,159 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 21:45:16,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:45:16,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:16,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:45:16,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 21:45:16,291 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:16,291 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:45:16,291 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373905470] [2019-10-14 21:45:16,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:45:16,292 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:16,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:45:16,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:45:16,293 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 14 states. [2019-10-14 21:45:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:16,470 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2019-10-14 21:45:16,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:45:16,471 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-14 21:45:16,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:16,472 INFO L225 Difference]: With dead ends: 131 [2019-10-14 21:45:16,472 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:45:16,473 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:45:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:45:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-10-14 21:45:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-14 21:45:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2019-10-14 21:45:16,487 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 66 [2019-10-14 21:45:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:16,487 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2019-10-14 21:45:16,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:45:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2019-10-14 21:45:16,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:45:16,489 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:16,489 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, 1, 1, 1, 1] [2019-10-14 21:45:16,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:16,694 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash 591181954, now seen corresponding path program 10 times [2019-10-14 21:45:16,695 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:16,695 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386330759] [2019-10-14 21:45:16,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:16,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:16,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-14 21:45:16,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386330759] [2019-10-14 21:45:16,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528317950] [2019-10-14 21:45:16,846 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 21:45:16,913 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:16,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:16,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:45:16,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-14 21:45:16,945 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:16,946 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:45:16,946 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981483498] [2019-10-14 21:45:16,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:45:16,947 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:16,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:45:16,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:16,948 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 15 states. [2019-10-14 21:45:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:17,154 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2019-10-14 21:45:17,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:45:17,154 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2019-10-14 21:45:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:17,155 INFO L225 Difference]: With dead ends: 140 [2019-10-14 21:45:17,155 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 21:45:17,156 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 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 21:45:17,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 21:45:17,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-10-14 21:45:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-14 21:45:17,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2019-10-14 21:45:17,163 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 71 [2019-10-14 21:45:17,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:17,164 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2019-10-14 21:45:17,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:45:17,164 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2019-10-14 21:45:17,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:45:17,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:17,165 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, 1, 1, 1, 1] [2019-10-14 21:45:17,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:17,367 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:17,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:17,368 INFO L82 PathProgramCache]: Analyzing trace with hash 665957076, now seen corresponding path program 11 times [2019-10-14 21:45:17,368 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:17,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390729668] [2019-10-14 21:45:17,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:17,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:17,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-10-14 21:45:17,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390729668] [2019-10-14 21:45:17,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333905020] [2019-10-14 21:45:17,570 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