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-multidimensional/init-non-constant-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:48:34,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:48:34,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:48:34,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:48:34,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:48:34,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:48:34,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:48:34,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:48:34,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:48:34,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:48:34,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:48:34,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:48:34,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:48:34,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:48:34,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:48:34,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:48:34,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:48:34,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:48:34,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:48:34,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:48:34,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:48:34,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:48:34,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:48:34,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:48:34,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:48:34,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:48:34,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:48:34,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:48:34,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:48:34,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:48:34,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:48:34,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:48:34,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:48:34,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:48:34,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:48:34,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:48:34,419 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 21:48:34,433 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:48:34,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:48:34,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:48:34,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:48:34,435 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:48:34,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:48:34,436 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:48:34,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:48:34,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:48:34,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:48:34,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:48:34,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:48:34,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:48:34,437 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:48:34,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:48:34,437 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:48:34,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:48:34,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:48:34,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:48:34,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:48:34,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:48:34,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:48:34,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:48:34,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:48:34,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:48:34,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:48:34,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:48:34,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:48:34,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:48:34,714 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:48:34,727 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:48:34,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:48:34,732 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:48:34,733 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:48:34,734 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c [2019-10-14 21:48:34,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7ebb3fb/6503d9c97a1a415697d56e9e9e58a581/FLAGab6e234fd [2019-10-14 21:48:35,217 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:48:35,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c [2019-10-14 21:48:35,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7ebb3fb/6503d9c97a1a415697d56e9e9e58a581/FLAGab6e234fd [2019-10-14 21:48:35,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b7ebb3fb/6503d9c97a1a415697d56e9e9e58a581 [2019-10-14 21:48:35,569 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:48:35,571 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:48:35,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:35,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:48:35,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:48:35,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:35" (1/1) ... [2019-10-14 21:48:35,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408294a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:35, skipping insertion in model container [2019-10-14 21:48:35,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:35" (1/1) ... [2019-10-14 21:48:35,587 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:48:35,605 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:48:35,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:35,763 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:48:35,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:35,806 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:48:35,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:35 WrapperNode [2019-10-14 21:48:35,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:35,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:48:35,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:48:35,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:48:35,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:35" (1/1) ... [2019-10-14 21:48:35,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:35" (1/1) ... [2019-10-14 21:48:35,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:35" (1/1) ... [2019-10-14 21:48:35,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:35" (1/1) ... [2019-10-14 21:48:35,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:35" (1/1) ... [2019-10-14 21:48:35,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:35" (1/1) ... [2019-10-14 21:48:35,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:35" (1/1) ... [2019-10-14 21:48:35,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:48:35,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:48:35,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:48:35,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:48:35,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:35" (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 21:48:36,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:48:36,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:48:36,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:48:36,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:48:36,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:48:36,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:48:36,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-14 21:48:36,019 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:48:36,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:48:36,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:48:36,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:48:36,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:48:36,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:48:36,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:48:36,296 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:48:36,296 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 21:48:36,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:36 BoogieIcfgContainer [2019-10-14 21:48:36,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:48:36,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:48:36,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:48:36,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:48:36,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:48:35" (1/3) ... [2019-10-14 21:48:36,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5193d4f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:36, skipping insertion in model container [2019-10-14 21:48:36,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:35" (2/3) ... [2019-10-14 21:48:36,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5193d4f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:36, skipping insertion in model container [2019-10-14 21:48:36,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:36" (3/3) ... [2019-10-14 21:48:36,319 INFO L109 eAbstractionObserver]: Analyzing ICFG init-non-constant-3-u.c [2019-10-14 21:48:36,329 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:48:36,336 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:48:36,352 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:48:36,380 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:48:36,381 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:48:36,381 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:48:36,381 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:48:36,381 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:48:36,381 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:48:36,382 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:48:36,382 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:48:36,405 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-10-14 21:48:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:48:36,410 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:36,411 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:36,413 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:36,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:36,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1375180307, now seen corresponding path program 1 times [2019-10-14 21:48:36,423 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:36,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853163012] [2019-10-14 21:48:36,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:36,424 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:36,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:36,495 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:36,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653175128] [2019-10-14 21:48:36,496 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 21:48:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:36,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-14 21:48:36,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:36,590 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 21:48:36,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853163012] [2019-10-14 21:48:36,591 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:36,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653175128] [2019-10-14 21:48:36,592 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:36,593 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 21:48:36,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804807779] [2019-10-14 21:48:36,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 21:48:36,596 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:36,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 21:48:36,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 21:48:36,609 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-10-14 21:48:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:36,631 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2019-10-14 21:48:36,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 21:48:36,633 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-10-14 21:48:36,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:36,642 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:48:36,642 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 21:48:36,645 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 21:48:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 21:48:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-14 21:48:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 21:48:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-10-14 21:48:36,691 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 15 [2019-10-14 21:48:36,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:36,692 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-10-14 21:48:36,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 21:48:36,692 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-10-14 21:48:36,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:48:36,694 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:36,694 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:36,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:36,898 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:36,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1308846031, now seen corresponding path program 1 times [2019-10-14 21:48:36,899 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:36,899 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565360733] [2019-10-14 21:48:36,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:36,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:36,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:36,913 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:36,913 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173619239] [2019-10-14 21:48:36,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:36,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:36,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:36,997 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 21:48:36,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565360733] [2019-10-14 21:48:36,998 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:36,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173619239] [2019-10-14 21:48:36,998 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:36,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:48:36,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133437776] [2019-10-14 21:48:37,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:48:37,001 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:37,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:48:37,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:48:37,002 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 3 states. [2019-10-14 21:48:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:37,056 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2019-10-14 21:48:37,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:48:37,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:48:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:37,058 INFO L225 Difference]: With dead ends: 44 [2019-10-14 21:48:37,058 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:48:37,060 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 21:48:37,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:48:37,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-10-14 21:48:37,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:48:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-14 21:48:37,067 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2019-10-14 21:48:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:37,069 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-14 21:48:37,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:48:37,069 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-14 21:48:37,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:48:37,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:37,071 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:37,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:37,276 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:37,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:37,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1886649102, now seen corresponding path program 1 times [2019-10-14 21:48:37,276 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:37,277 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827849600] [2019-10-14 21:48:37,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:37,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:37,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:37,287 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:37,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129863050] [2019-10-14 21:48:37,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:37,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:37,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:37,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827849600] [2019-10-14 21:48:37,373 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:37,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129863050] [2019-10-14 21:48:37,376 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:37,376 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:37,376 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366632610] [2019-10-14 21:48:37,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:37,377 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:37,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:37,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:37,378 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-10-14 21:48:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:37,456 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2019-10-14 21:48:37,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:37,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 21:48:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:37,459 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:48:37,460 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:48:37,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:48:37,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2019-10-14 21:48:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:48:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-14 21:48:37,472 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2019-10-14 21:48:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:37,472 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-14 21:48:37,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-14 21:48:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:48:37,474 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:37,474 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 21:48:37,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:37,686 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:37,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:37,687 INFO L82 PathProgramCache]: Analyzing trace with hash -464275123, now seen corresponding path program 1 times [2019-10-14 21:48:37,687 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:37,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701847328] [2019-10-14 21:48:37,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:37,688 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:37,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:37,698 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:37,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306209928] [2019-10-14 21:48:37,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:37,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:37,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:37,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701847328] [2019-10-14 21:48:37,769 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:37,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306209928] [2019-10-14 21:48:37,769 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:37,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:37,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110743082] [2019-10-14 21:48:37,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:37,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:37,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:37,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:37,771 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-10-14 21:48:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:37,872 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-10-14 21:48:37,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:37,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 21:48:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:37,874 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:48:37,882 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:48:37,883 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:37,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:48:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-10-14 21:48:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 21:48:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-14 21:48:37,891 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 21 [2019-10-14 21:48:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:37,892 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-14 21:48:37,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:37,892 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-14 21:48:37,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:48:37,893 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:37,893 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 21:48:38,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:38,096 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash -727027933, now seen corresponding path program 1 times [2019-10-14 21:48:38,098 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:38,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644451755] [2019-10-14 21:48:38,102 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:38,102 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:38,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:38,121 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:38,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461591260] [2019-10-14 21:48:38,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:38,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:38,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:38,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644451755] [2019-10-14 21:48:38,206 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:38,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461591260] [2019-10-14 21:48:38,207 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:38,207 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:38,207 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107731284] [2019-10-14 21:48:38,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:38,208 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:38,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:38,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:38,210 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-10-14 21:48:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:38,297 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2019-10-14 21:48:38,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:38,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-14 21:48:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:38,299 INFO L225 Difference]: With dead ends: 60 [2019-10-14 21:48:38,299 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:48:38,300 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:48:38,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-10-14 21:48:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:48:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-14 21:48:38,311 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2019-10-14 21:48:38,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:38,311 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-14 21:48:38,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:38,312 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-14 21:48:38,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:48:38,312 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:38,313 INFO L380 BasicCegarLoop]: trace histogram [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 21:48:38,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:38,516 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:38,517 INFO L82 PathProgramCache]: Analyzing trace with hash -282430451, now seen corresponding path program 2 times [2019-10-14 21:48:38,517 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:38,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937375854] [2019-10-14 21:48:38,518 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:38,518 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:38,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:38,525 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:38,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704871865] [2019-10-14 21:48:38,525 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:38,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:38,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:38,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:48:38,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:38,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937375854] [2019-10-14 21:48:38,620 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:38,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704871865] [2019-10-14 21:48:38,621 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:38,621 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:48:38,622 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838301476] [2019-10-14 21:48:38,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:48:38,623 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:38,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:48:38,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:38,623 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2019-10-14 21:48:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:38,724 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2019-10-14 21:48:38,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:48:38,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-14 21:48:38,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:38,727 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:48:38,727 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:48:38,728 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:48:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-10-14 21:48:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:48:38,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-10-14 21:48:38,736 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2019-10-14 21:48:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:38,737 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-10-14 21:48:38,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:48:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-10-14 21:48:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:48:38,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:38,741 INFO L380 BasicCegarLoop]: trace histogram [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 21:48:38,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:38,946 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:38,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:38,946 INFO L82 PathProgramCache]: Analyzing trace with hash 615189603, now seen corresponding path program 3 times [2019-10-14 21:48:38,946 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:38,946 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316652413] [2019-10-14 21:48:38,947 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:38,947 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:38,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:38,952 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:38,953 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011570932] [2019-10-14 21:48:38,953 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 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 21:48:38,988 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:48:38,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:38,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:38,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:48:39,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316652413] [2019-10-14 21:48:39,015 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:39,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011570932] [2019-10-14 21:48:39,015 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:39,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-14 21:48:39,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556696188] [2019-10-14 21:48:39,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:39,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:39,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:39,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:39,017 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 4 states. [2019-10-14 21:48:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:39,089 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2019-10-14 21:48:39,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:39,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-10-14 21:48:39,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:39,090 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:48:39,090 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:48:39,091 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:48:39,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2019-10-14 21:48:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:48:39,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2019-10-14 21:48:39,100 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 24 [2019-10-14 21:48:39,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:39,100 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2019-10-14 21:48:39,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:39,100 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2019-10-14 21:48:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:48:39,101 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:39,101 INFO L380 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:39,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:39,306 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:39,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:39,306 INFO L82 PathProgramCache]: Analyzing trace with hash 550587983, now seen corresponding path program 4 times [2019-10-14 21:48:39,307 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:39,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140742741] [2019-10-14 21:48:39,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:39,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:39,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:39,315 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:39,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307455309] [2019-10-14 21:48:39,315 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 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 21:48:39,355 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:39,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:39,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:48:39,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:48:39,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140742741] [2019-10-14 21:48:39,421 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:39,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307455309] [2019-10-14 21:48:39,422 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:39,422 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 21:48:39,422 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178504492] [2019-10-14 21:48:39,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:48:39,423 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:39,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:48:39,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:48:39,423 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 8 states. [2019-10-14 21:48:39,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:39,597 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2019-10-14 21:48:39,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:48:39,597 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-10-14 21:48:39,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:39,598 INFO L225 Difference]: With dead ends: 126 [2019-10-14 21:48:39,598 INFO L226 Difference]: Without dead ends: 93 [2019-10-14 21:48:39,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:48:39,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-14 21:48:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2019-10-14 21:48:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:48:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2019-10-14 21:48:39,614 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 33 [2019-10-14 21:48:39,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:39,614 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2019-10-14 21:48:39,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:48:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2019-10-14 21:48:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:48:39,616 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:39,616 INFO L380 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:39,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:39,817 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:39,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:39,818 INFO L82 PathProgramCache]: Analyzing trace with hash -98839249, now seen corresponding path program 5 times [2019-10-14 21:48:39,818 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:39,819 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499518776] [2019-10-14 21:48:39,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:39,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:39,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:39,829 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:39,829 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114624835] [2019-10-14 21:48:39,830 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 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 21:49:06,446 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-14 21:49:06,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:06,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:49:06,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 74 proven. 52 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-14 21:49:06,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499518776] [2019-10-14 21:49:06,555 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:06,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114624835] [2019-10-14 21:49:06,556 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:06,556 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 21:49:06,556 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625030181] [2019-10-14 21:49:06,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:49:06,557 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:06,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:49:06,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:49:06,557 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 11 states. [2019-10-14 21:49:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:06,839 INFO L93 Difference]: Finished difference Result 186 states and 231 transitions. [2019-10-14 21:49:06,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:49:06,839 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2019-10-14 21:49:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:06,841 INFO L225 Difference]: With dead ends: 186 [2019-10-14 21:49:06,841 INFO L226 Difference]: Without dead ends: 129 [2019-10-14 21:49:06,842 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:49:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-10-14 21:49:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 106. [2019-10-14 21:49:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-14 21:49:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2019-10-14 21:49:06,860 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 45 [2019-10-14 21:49:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:06,861 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2019-10-14 21:49:06,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:49:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2019-10-14 21:49:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:49:06,863 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:06,863 INFO L380 BasicCegarLoop]: trace histogram [15, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:07,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:07,069 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:07,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:07,069 INFO L82 PathProgramCache]: Analyzing trace with hash 756330270, now seen corresponding path program 6 times [2019-10-14 21:49:07,070 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:07,070 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884102538] [2019-10-14 21:49:07,070 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:07,070 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:07,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:07,078 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:07,078 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044667233] [2019-10-14 21:49:07,078 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 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 21:49:07,273 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-14 21:49:07,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:07,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:49:07,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 128 proven. 6 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-14 21:49:07,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884102538] [2019-10-14 21:49:07,326 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:07,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044667233] [2019-10-14 21:49:07,327 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:07,327 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 21:49:07,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523775190] [2019-10-14 21:49:07,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:49:07,329 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:07,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:49:07,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:49:07,329 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 7 states. [2019-10-14 21:49:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:07,433 INFO L93 Difference]: Finished difference Result 223 states and 285 transitions. [2019-10-14 21:49:07,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:49:07,433 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-10-14 21:49:07,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:07,435 INFO L225 Difference]: With dead ends: 223 [2019-10-14 21:49:07,435 INFO L226 Difference]: Without dead ends: 129 [2019-10-14 21:49:07,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:49:07,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-10-14 21:49:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2019-10-14 21:49:07,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-14 21:49:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 148 transitions. [2019-10-14 21:49:07,454 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 148 transitions. Word has length 51 [2019-10-14 21:49:07,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:07,455 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 148 transitions. [2019-10-14 21:49:07,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:49:07,455 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 148 transitions. [2019-10-14 21:49:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:49:07,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:07,456 INFO L380 BasicCegarLoop]: trace histogram [20, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:07,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:07,665 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:07,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:07,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1585754356, now seen corresponding path program 7 times [2019-10-14 21:49:07,666 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:07,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43299909] [2019-10-14 21:49:07,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:07,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:07,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:07,674 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:07,674 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823350644] [2019-10-14 21:49:07,674 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 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 21:49:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:07,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:49:07,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 108 proven. 10 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2019-10-14 21:49:07,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43299909] [2019-10-14 21:49:07,784 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:07,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823350644] [2019-10-14 21:49:07,785 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:07,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 21:49:07,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481783392] [2019-10-14 21:49:07,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:49:07,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:07,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:49:07,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:49:07,787 INFO L87 Difference]: Start difference. First operand 121 states and 148 transitions. Second operand 8 states. [2019-10-14 21:49:07,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:07,902 INFO L93 Difference]: Finished difference Result 252 states and 320 transitions. [2019-10-14 21:49:07,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:49:07,902 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-10-14 21:49:07,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:07,904 INFO L225 Difference]: With dead ends: 252 [2019-10-14 21:49:07,904 INFO L226 Difference]: Without dead ends: 144 [2019-10-14 21:49:07,907 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:49:07,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-10-14 21:49:07,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2019-10-14 21:49:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-10-14 21:49:07,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 166 transitions. [2019-10-14 21:49:07,936 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 166 transitions. Word has length 56 [2019-10-14 21:49:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:07,936 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 166 transitions. [2019-10-14 21:49:07,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:49:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 166 transitions. [2019-10-14 21:49:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:49:07,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:07,942 INFO L380 BasicCegarLoop]: trace histogram [25, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:08,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:08,147 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:08,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1846555298, now seen corresponding path program 8 times [2019-10-14 21:49:08,148 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:08,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840320694] [2019-10-14 21:49:08,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:08,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:08,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:08,157 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:08,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549158296] [2019-10-14 21:49:08,158 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:08,208 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:49:08,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:08,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:49:08,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 152 proven. 15 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-10-14 21:49:08,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840320694] [2019-10-14 21:49:08,293 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:08,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549158296] [2019-10-14 21:49:08,293 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:08,293 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 21:49:08,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168611480] [2019-10-14 21:49:08,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:49:08,295 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:08,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:49:08,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:49:08,296 INFO L87 Difference]: Start difference. First operand 136 states and 166 transitions. Second operand 9 states. [2019-10-14 21:49:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:08,387 INFO L93 Difference]: Finished difference Result 281 states and 355 transitions. [2019-10-14 21:49:08,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:49:08,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2019-10-14 21:49:08,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:08,390 INFO L225 Difference]: With dead ends: 281 [2019-10-14 21:49:08,390 INFO L226 Difference]: Without dead ends: 159 [2019-10-14 21:49:08,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:49:08,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-10-14 21:49:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2019-10-14 21:49:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-10-14 21:49:08,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 184 transitions. [2019-10-14 21:49:08,408 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 184 transitions. Word has length 61 [2019-10-14 21:49:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:08,408 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 184 transitions. [2019-10-14 21:49:08,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:49:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 184 transitions. [2019-10-14 21:49:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:49:08,409 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:08,409 INFO L380 BasicCegarLoop]: trace histogram [30, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:08,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:08,618 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:08,619 INFO L82 PathProgramCache]: Analyzing trace with hash -820098380, now seen corresponding path program 9 times [2019-10-14 21:49:08,619 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:08,619 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783693945] [2019-10-14 21:49:08,619 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:08,619 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:08,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:08,625 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:08,626 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614034469] [2019-10-14 21:49:08,626 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:08,877 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 21:49:08,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:08,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:49:08,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 209 proven. 21 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:49:08,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783693945] [2019-10-14 21:49:08,976 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:08,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614034469] [2019-10-14 21:49:08,977 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:08,977 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 21:49:08,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315392664] [2019-10-14 21:49:08,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:49:08,978 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:08,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:49:08,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:49:08,979 INFO L87 Difference]: Start difference. First operand 151 states and 184 transitions. Second operand 10 states. [2019-10-14 21:49:09,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:09,087 INFO L93 Difference]: Finished difference Result 310 states and 390 transitions. [2019-10-14 21:49:09,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:49:09,090 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2019-10-14 21:49:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:09,092 INFO L225 Difference]: With dead ends: 310 [2019-10-14 21:49:09,092 INFO L226 Difference]: Without dead ends: 174 [2019-10-14 21:49:09,095 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:49:09,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-10-14 21:49:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 166. [2019-10-14 21:49:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-10-14 21:49:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 202 transitions. [2019-10-14 21:49:09,130 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 202 transitions. Word has length 66 [2019-10-14 21:49:09,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:09,132 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 202 transitions. [2019-10-14 21:49:09,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:49:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 202 transitions. [2019-10-14 21:49:09,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:49:09,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:09,135 INFO L380 BasicCegarLoop]: trace histogram [35, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:09,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:09,342 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:09,342 INFO L82 PathProgramCache]: Analyzing trace with hash 109034398, now seen corresponding path program 10 times [2019-10-14 21:49:09,343 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:09,343 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676470200] [2019-10-14 21:49:09,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:09,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:09,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:09,349 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:09,349 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882517566] [2019-10-14 21:49:09,350 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:09,408 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:49:09,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:09,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:49:09,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 425 proven. 208 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-10-14 21:49:09,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676470200] [2019-10-14 21:49:09,549 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:09,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882517566] [2019-10-14 21:49:09,550 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:09,550 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 21:49:09,550 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791907201] [2019-10-14 21:49:09,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:49:09,551 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:09,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:49:09,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:49:09,551 INFO L87 Difference]: Start difference. First operand 166 states and 202 transitions. Second operand 14 states. [2019-10-14 21:49:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:09,831 INFO L93 Difference]: Finished difference Result 369 states and 459 transitions. [2019-10-14 21:49:09,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:49:09,832 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2019-10-14 21:49:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:09,834 INFO L225 Difference]: With dead ends: 369 [2019-10-14 21:49:09,834 INFO L226 Difference]: Without dead ends: 241 [2019-10-14 21:49:09,835 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:49:09,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-10-14 21:49:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 199. [2019-10-14 21:49:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-10-14 21:49:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 242 transitions. [2019-10-14 21:49:09,855 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 242 transitions. Word has length 71 [2019-10-14 21:49:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:09,855 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 242 transitions. [2019-10-14 21:49:09,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:49:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 242 transitions. [2019-10-14 21:49:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-14 21:49:09,857 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:09,857 INFO L380 BasicCegarLoop]: trace histogram [56, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:10,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:10,069 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:10,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:10,069 INFO L82 PathProgramCache]: Analyzing trace with hash -552358545, now seen corresponding path program 11 times [2019-10-14 21:49:10,070 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:10,070 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985691976] [2019-10-14 21:49:10,070 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:10,070 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:10,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:10,079 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:10,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281836013] [2019-10-14 21:49:10,079 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true