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/min-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:48:49,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:48:49,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:48:49,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:48:49,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:48:49,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:48:49,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:48:49,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:48:49,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:48:49,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:48:49,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:48:49,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:48:49,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:48:49,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:48:49,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:48:49,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:48:49,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:48:49,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:48:49,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:48:49,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:48:49,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:48:49,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:48:49,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:48:49,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:48:49,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:48:49,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:48:49,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:48:49,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:48:49,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:48:49,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:48:49,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:48:49,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:48:49,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:48:49,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:48:49,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:48:49,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:48:49,266 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 21:48:49,309 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:48:49,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:48:49,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:48:49,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:48:49,311 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:48:49,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:48:49,311 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:48:49,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:48:49,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:48:49,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:48:49,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:48:49,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:48:49,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:48:49,313 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:48:49,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:48:49,314 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:48:49,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:48:49,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:48:49,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:48:49,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:48:49,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:48:49,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:48:49,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:48:49,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:48:49,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:48:49,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:48:49,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:48:49,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:48:49,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:48:49,606 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:48:49,618 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:48:49,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:48:49,623 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:48:49,624 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:48:49,625 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/min-3-n-u.c [2019-10-14 21:48:49,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f64d0d8c4/1b2c8c66e8a74d79a3d5588d8a1a428d/FLAG670adfdfc [2019-10-14 21:48:50,293 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:48:50,294 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/min-3-n-u.c [2019-10-14 21:48:50,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f64d0d8c4/1b2c8c66e8a74d79a3d5588d8a1a428d/FLAG670adfdfc [2019-10-14 21:48:50,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f64d0d8c4/1b2c8c66e8a74d79a3d5588d8a1a428d [2019-10-14 21:48:50,729 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:48:50,731 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:48:50,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:50,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:48:50,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:48:50,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:50" (1/1) ... [2019-10-14 21:48:50,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf983e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:50, skipping insertion in model container [2019-10-14 21:48:50,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:50" (1/1) ... [2019-10-14 21:48:50,747 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:48:50,769 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:48:50,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:50,968 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:48:50,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:51,091 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:48:51,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:51 WrapperNode [2019-10-14 21:48:51,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:51,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:48:51,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:48:51,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:48:51,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:51" (1/1) ... [2019-10-14 21:48:51,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:51" (1/1) ... [2019-10-14 21:48:51,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:51" (1/1) ... [2019-10-14 21:48:51,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:51" (1/1) ... [2019-10-14 21:48:51,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:51" (1/1) ... [2019-10-14 21:48:51,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:51" (1/1) ... [2019-10-14 21:48:51,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:51" (1/1) ... [2019-10-14 21:48:51,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:48:51,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:48:51,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:48:51,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:48:51,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:51" (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 21:48:51,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:48:51,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:48:51,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:48:51,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:48:51,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:48:51,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:48:51,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:48:51,206 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:48:51,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:48:51,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:48:51,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:48:51,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:48:51,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:48:51,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:48:51,544 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:48:51,544 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-14 21:48:51,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:51 BoogieIcfgContainer [2019-10-14 21:48:51,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:48:51,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:48:51,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:48:51,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:48:51,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:48:50" (1/3) ... [2019-10-14 21:48:51,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc4fb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:51, skipping insertion in model container [2019-10-14 21:48:51,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:51" (2/3) ... [2019-10-14 21:48:51,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc4fb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:51, skipping insertion in model container [2019-10-14 21:48:51,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:51" (3/3) ... [2019-10-14 21:48:51,552 INFO L109 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2019-10-14 21:48:51,559 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:48:51,566 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:48:51,577 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:48:51,607 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:48:51,607 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:48:51,607 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:48:51,607 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:48:51,608 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:48:51,608 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:48:51,608 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:48:51,608 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:48:51,623 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-10-14 21:48:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:48:51,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:51,629 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:51,631 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:51,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:51,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1187401570, now seen corresponding path program 1 times [2019-10-14 21:48:51,642 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:51,643 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19038184] [2019-10-14 21:48:51,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:51,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:51,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:51,717 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:51,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175388575] [2019-10-14 21:48:51,718 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 21:48:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:51,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-14 21:48:51,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:51,829 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 21:48:51,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19038184] [2019-10-14 21:48:51,830 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:51,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175388575] [2019-10-14 21:48:51,831 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:51,831 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 21:48:51,832 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049571374] [2019-10-14 21:48:51,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 21:48:51,837 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:51,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 21:48:51,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 21:48:51,854 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2019-10-14 21:48:51,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:51,884 INFO L93 Difference]: Finished difference Result 70 states and 109 transitions. [2019-10-14 21:48:51,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 21:48:51,885 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-14 21:48:51,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:51,894 INFO L225 Difference]: With dead ends: 70 [2019-10-14 21:48:51,895 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:48:51,898 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 21:48:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:48:51,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-14 21:48:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:48:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-10-14 21:48:51,942 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2019-10-14 21:48:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:51,943 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-10-14 21:48:51,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 21:48:51,943 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-10-14 21:48:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:48:51,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:51,944 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:52,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:52,148 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:52,150 INFO L82 PathProgramCache]: Analyzing trace with hash -738632508, now seen corresponding path program 1 times [2019-10-14 21:48:52,150 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:52,150 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779768278] [2019-10-14 21:48:52,151 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:52,151 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:52,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:52,161 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:52,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988950254] [2019-10-14 21:48:52,162 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 21:48:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:52,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:52,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:52,246 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 21:48:52,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779768278] [2019-10-14 21:48:52,247 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:52,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988950254] [2019-10-14 21:48:52,248 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:52,248 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:48:52,248 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855663267] [2019-10-14 21:48:52,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:48:52,250 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:52,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:48:52,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:48:52,251 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 3 states. [2019-10-14 21:48:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:52,314 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2019-10-14 21:48:52,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:48:52,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-14 21:48:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:52,316 INFO L225 Difference]: With dead ends: 60 [2019-10-14 21:48:52,316 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:48:52,319 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 21:48:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:48:52,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-10-14 21:48:52,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:48:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-10-14 21:48:52,336 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 17 [2019-10-14 21:48:52,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:52,336 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-10-14 21:48:52,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:48:52,337 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-10-14 21:48:52,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:48:52,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:52,341 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:52,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:52,543 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:52,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1951122805, now seen corresponding path program 1 times [2019-10-14 21:48:52,544 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:52,544 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180157251] [2019-10-14 21:48:52,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:52,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:52,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:52,560 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:52,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993636191] [2019-10-14 21:48:52,561 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 21:48:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:52,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:52,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:52,651 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 21:48:52,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180157251] [2019-10-14 21:48:52,657 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:52,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993636191] [2019-10-14 21:48:52,657 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:52,657 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:52,657 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719033983] [2019-10-14 21:48:52,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:52,658 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:52,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:52,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:52,660 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2019-10-14 21:48:52,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:52,772 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2019-10-14 21:48:52,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:52,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-14 21:48:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:52,776 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:48:52,776 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:48:52,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 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 21:48:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:48:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2019-10-14 21:48:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:48:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2019-10-14 21:48:52,791 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 20 [2019-10-14 21:48:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:52,792 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2019-10-14 21:48:52,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2019-10-14 21:48:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:48:52,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:52,793 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:53,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:53,007 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:53,008 INFO L82 PathProgramCache]: Analyzing trace with hash 271293506, now seen corresponding path program 1 times [2019-10-14 21:48:53,008 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:53,008 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921728202] [2019-10-14 21:48:53,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:53,019 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:53,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428864045] [2019-10-14 21:48:53,019 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 21:48:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:53,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:53,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:53,099 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 21:48:53,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921728202] [2019-10-14 21:48:53,100 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:53,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428864045] [2019-10-14 21:48:53,100 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:53,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:53,101 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076819103] [2019-10-14 21:48:53,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:53,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:53,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:53,102 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 4 states. [2019-10-14 21:48:53,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:53,187 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2019-10-14 21:48:53,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:53,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-14 21:48:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:53,189 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:48:53,189 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:48:53,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 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 21:48:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:48:53,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2019-10-14 21:48:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:48:53,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2019-10-14 21:48:53,199 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 23 [2019-10-14 21:48:53,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:53,199 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2019-10-14 21:48:53,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:53,199 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2019-10-14 21:48:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:48:53,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:53,200 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:53,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:53,404 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:53,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:53,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2014780548, now seen corresponding path program 1 times [2019-10-14 21:48:53,405 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:53,405 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939091039] [2019-10-14 21:48:53,405 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,405 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:53,413 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:53,414 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780318684] [2019-10-14 21:48:53,414 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 21:48:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:53,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:53,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:53,521 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 21:48:53,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939091039] [2019-10-14 21:48:53,521 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:53,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780318684] [2019-10-14 21:48:53,522 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:53,522 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:53,523 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831847685] [2019-10-14 21:48:53,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:53,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:53,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:53,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:53,527 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 5 states. [2019-10-14 21:48:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:53,661 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2019-10-14 21:48:53,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:53,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-14 21:48:53,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:53,663 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:48:53,663 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:48:53,665 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 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 21:48:53,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:48:53,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2019-10-14 21:48:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:48:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2019-10-14 21:48:53,684 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 24 [2019-10-14 21:48:53,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:53,687 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2019-10-14 21:48:53,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:53,688 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2019-10-14 21:48:53,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:48:53,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:53,689 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, 1, 1] [2019-10-14 21:48:53,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:53,894 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash 131367810, now seen corresponding path program 2 times [2019-10-14 21:48:53,894 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:53,894 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132581863] [2019-10-14 21:48:53,894 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,895 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:53,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:53,901 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:53,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765760106] [2019-10-14 21:48:53,901 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 21:48:53,940 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:48:53,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:53,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:53,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:48:53,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132581863] [2019-10-14 21:48:53,963 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:53,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765760106] [2019-10-14 21:48:53,964 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:53,964 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:53,964 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529349354] [2019-10-14 21:48:53,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:53,969 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:53,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:53,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:53,970 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 4 states. [2019-10-14 21:48:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:54,059 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2019-10-14 21:48:54,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:54,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-14 21:48:54,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:54,061 INFO L225 Difference]: With dead ends: 97 [2019-10-14 21:48:54,061 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 21:48:54,061 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 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 21:48:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 21:48:54,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2019-10-14 21:48:54,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:48:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2019-10-14 21:48:54,080 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 25 [2019-10-14 21:48:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:54,080 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2019-10-14 21:48:54,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2019-10-14 21:48:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:48:54,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:54,082 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:54,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:54,292 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:54,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:54,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1605521934, now seen corresponding path program 1 times [2019-10-14 21:48:54,293 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:54,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057181965] [2019-10-14 21:48:54,293 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:54,293 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:54,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:54,300 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:54,300 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839239928] [2019-10-14 21:48:54,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:54,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:48:54,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:48:54,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057181965] [2019-10-14 21:48:54,417 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:54,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839239928] [2019-10-14 21:48:54,417 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:54,417 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:48:54,417 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914419943] [2019-10-14 21:48:54,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:48:54,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:54,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:48:54,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:54,419 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 6 states. [2019-10-14 21:48:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:54,525 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2019-10-14 21:48:54,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:48:54,526 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-10-14 21:48:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:54,527 INFO L225 Difference]: With dead ends: 101 [2019-10-14 21:48:54,527 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:48:54,528 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 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 21:48:54,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:48:54,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-10-14 21:48:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:48:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2019-10-14 21:48:54,539 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 37 [2019-10-14 21:48:54,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:54,540 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2019-10-14 21:48:54,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:48:54,540 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2019-10-14 21:48:54,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:48:54,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:54,542 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:54,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:54,746 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:54,747 INFO L82 PathProgramCache]: Analyzing trace with hash -675781077, now seen corresponding path program 2 times [2019-10-14 21:48:54,748 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:54,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237195101] [2019-10-14 21:48:54,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:54,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:54,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:54,760 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:54,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802945682] [2019-10-14 21:48:54,761 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:54,839 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:54,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:54,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:48:54,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:48:54,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237195101] [2019-10-14 21:48:54,905 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:54,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802945682] [2019-10-14 21:48:54,906 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:54,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 21:48:54,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151161535] [2019-10-14 21:48:54,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:48:54,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:54,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:48:54,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:54,908 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 7 states. [2019-10-14 21:48:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:55,022 INFO L93 Difference]: Finished difference Result 115 states and 148 transitions. [2019-10-14 21:48:55,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:48:55,024 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2019-10-14 21:48:55,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:55,025 INFO L225 Difference]: With dead ends: 115 [2019-10-14 21:48:55,025 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:48:55,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 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 21:48:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:48:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2019-10-14 21:48:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:48:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2019-10-14 21:48:55,037 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 41 [2019-10-14 21:48:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:55,037 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2019-10-14 21:48:55,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:48:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2019-10-14 21:48:55,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:48:55,039 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:55,041 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:55,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:55,246 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:55,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:55,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1399380910, now seen corresponding path program 3 times [2019-10-14 21:48:55,247 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:55,247 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840642005] [2019-10-14 21:48:55,247 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:55,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:55,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:55,254 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:55,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950125022] [2019-10-14 21:48:55,255 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:55,295 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:48:55,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:55,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:55,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:48:55,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840642005] [2019-10-14 21:48:55,346 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:55,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950125022] [2019-10-14 21:48:55,347 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:55,347 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:55,347 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462565619] [2019-10-14 21:48:55,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:55,348 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:55,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:55,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:55,348 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 5 states. [2019-10-14 21:48:55,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:55,444 INFO L93 Difference]: Finished difference Result 197 states and 254 transitions. [2019-10-14 21:48:55,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:55,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2019-10-14 21:48:55,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:55,446 INFO L225 Difference]: With dead ends: 197 [2019-10-14 21:48:55,446 INFO L226 Difference]: Without dead ends: 152 [2019-10-14 21:48:55,447 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 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 21:48:55,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-10-14 21:48:55,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2019-10-14 21:48:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 21:48:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2019-10-14 21:48:55,462 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 45 [2019-10-14 21:48:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:55,463 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2019-10-14 21:48:55,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2019-10-14 21:48:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 21:48:55,464 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:55,464 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:55,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:55,668 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:55,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1340791648, now seen corresponding path program 4 times [2019-10-14 21:48:55,669 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:55,670 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320682117] [2019-10-14 21:48:55,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:55,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:55,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:55,678 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:55,678 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048877270] [2019-10-14 21:48:55,678 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:55,741 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:55,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:55,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:48:55,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:55,830 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 21:48:55,832 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:55,835 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:55,835 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:55,835 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-10-14 21:48:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 21:48:55,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320682117] [2019-10-14 21:48:55,859 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:55,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048877270] [2019-10-14 21:48:55,859 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:55,861 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:48:55,861 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435511274] [2019-10-14 21:48:55,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:48:55,862 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:55,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:48:55,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:55,865 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 6 states. [2019-10-14 21:48:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:55,953 INFO L93 Difference]: Finished difference Result 180 states and 232 transitions. [2019-10-14 21:48:55,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:48:55,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2019-10-14 21:48:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:55,955 INFO L225 Difference]: With dead ends: 180 [2019-10-14 21:48:55,956 INFO L226 Difference]: Without dead ends: 120 [2019-10-14 21:48:55,957 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-14 21:48:55,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 92. [2019-10-14 21:48:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-14 21:48:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2019-10-14 21:48:55,970 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 73 [2019-10-14 21:48:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:55,971 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2019-10-14 21:48:55,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:48:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2019-10-14 21:48:55,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 21:48:55,972 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:55,972 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:56,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:56,185 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:56,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:56,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1588938142, now seen corresponding path program 1 times [2019-10-14 21:48:56,185 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:56,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438466776] [2019-10-14 21:48:56,186 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:56,186 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:56,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:56,193 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:56,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731981643] [2019-10-14 21:48:56,193 INFO L94 rtionOrderModulation]: Keeping assertion order 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 21:48:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:56,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:48:56,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-14 21:48:56,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438466776] [2019-10-14 21:48:56,337 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:56,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731981643] [2019-10-14 21:48:56,338 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:56,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 21:48:56,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535429637] [2019-10-14 21:48:56,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:48:56,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:56,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:48:56,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:48:56,340 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand 8 states. [2019-10-14 21:48:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:56,468 INFO L93 Difference]: Finished difference Result 194 states and 251 transitions. [2019-10-14 21:48:56,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:48:56,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2019-10-14 21:48:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:56,470 INFO L225 Difference]: With dead ends: 194 [2019-10-14 21:48:56,470 INFO L226 Difference]: Without dead ends: 110 [2019-10-14 21:48:56,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 66 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 21:48:56,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-14 21:48:56,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2019-10-14 21:48:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-14 21:48:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2019-10-14 21:48:56,483 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 73 [2019-10-14 21:48:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:56,484 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2019-10-14 21:48:56,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:48:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2019-10-14 21:48:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:48:56,485 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:56,486 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:56,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:56,689 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:56,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:56,690 INFO L82 PathProgramCache]: Analyzing trace with hash 373177058, now seen corresponding path program 2 times [2019-10-14 21:48:56,690 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:56,690 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128998604] [2019-10-14 21:48:56,691 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:56,691 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:56,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:56,697 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:56,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136555838] [2019-10-14 21:48:56,698 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 21:48:56,761 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:56,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:56,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:48:56,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-14 21:48:56,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128998604] [2019-10-14 21:48:56,876 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:56,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136555838] [2019-10-14 21:48:56,876 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:56,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 21:48:56,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290601741] [2019-10-14 21:48:56,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:48:56,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:56,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:48:56,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:48:56,878 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand 9 states. [2019-10-14 21:48:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:57,060 INFO L93 Difference]: Finished difference Result 216 states and 279 transitions. [2019-10-14 21:48:57,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:48:57,060 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 81 [2019-10-14 21:48:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:57,061 INFO L225 Difference]: With dead ends: 216 [2019-10-14 21:48:57,061 INFO L226 Difference]: Without dead ends: 121 [2019-10-14 21:48:57,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 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 21:48:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-14 21:48:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2019-10-14 21:48:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-14 21:48:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 143 transitions. [2019-10-14 21:48:57,080 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 143 transitions. Word has length 81 [2019-10-14 21:48:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:57,083 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 143 transitions. [2019-10-14 21:48:57,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:48:57,083 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 143 transitions. [2019-10-14 21:48:57,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 21:48:57,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:57,084 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:57,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:57,288 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:57,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1259869406, now seen corresponding path program 3 times [2019-10-14 21:48:57,289 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:57,289 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486049706] [2019-10-14 21:48:57,289 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:57,289 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:57,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:57,296 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:57,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493468289] [2019-10-14 21:48:57,297 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 21:48:57,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 21:48:57,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:57,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:48:57,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2019-10-14 21:48:57,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486049706] [2019-10-14 21:48:57,656 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:57,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493468289] [2019-10-14 21:48:57,656 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:57,657 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 21:48:57,657 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886910432] [2019-10-14 21:48:57,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:48:57,657 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:57,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:48:57,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:48:57,658 INFO L87 Difference]: Start difference. First operand 114 states and 143 transitions. Second operand 10 states. [2019-10-14 21:48:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:57,806 INFO L93 Difference]: Finished difference Result 238 states and 307 transitions. [2019-10-14 21:48:57,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:48:57,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2019-10-14 21:48:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:57,808 INFO L225 Difference]: With dead ends: 238 [2019-10-14 21:48:57,808 INFO L226 Difference]: Without dead ends: 132 [2019-10-14 21:48:57,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:48:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-14 21:48:57,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2019-10-14 21:48:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 21:48:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 157 transitions. [2019-10-14 21:48:57,821 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 157 transitions. Word has length 89 [2019-10-14 21:48:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:57,821 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 157 transitions. [2019-10-14 21:48:57,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:48:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 157 transitions. [2019-10-14 21:48:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-14 21:48:57,823 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:57,823 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:58,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:58,028 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2135024862, now seen corresponding path program 4 times [2019-10-14 21:48:58,029 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:58,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720220352] [2019-10-14 21:48:58,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:58,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:58,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:58,038 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:58,038 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897654877] [2019-10-14 21:48:58,038 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 21:48:58,094 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:58,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:58,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 53 conjunts are in the unsatisfiable core [2019-10-14 21:48:58,100 INFO L279 TraceCheckSpWp]: Computing forward predicates...