/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/init-non-constant-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:42:17,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:42:17,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:42:17,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:42:17,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:42:17,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:42:17,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:42:17,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:42:17,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:42:17,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:42:17,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:42:17,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:42:17,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:42:17,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:42:17,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:42:17,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:42:17,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:42:17,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:42:17,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:42:17,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:42:17,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:42:17,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:42:17,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:42:17,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:42:17,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:42:17,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:42:17,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:42:17,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:42:17,193 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 [2019-11-23 20:42:17,213 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:42:17,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:42:17,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:42:17,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:42:17,215 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:42:17,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:42:17,215 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:42:17,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:42:17,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:42:17,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:42:17,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:42:17,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:42:17,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:42:17,217 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:42:17,218 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:42:17,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:42:17,218 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:42:17,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:42:17,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:42:17,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:42:17,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:42:17,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:42:17,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:42:17,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:42:17,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:42:17,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:42:17,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:42:17,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:42:17,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:42:17,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:42:17,487 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:42:17,500 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:42:17,503 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:42:17,505 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:42:17,505 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:42:17,506 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-non-constant-2-n-u.c [2019-11-23 20:42:17,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ee41fc4a/f08fa442f1b54268b45e6f43489f0fd6/FLAGc1be3a977 [2019-11-23 20:42:17,987 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:42:17,988 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-non-constant-2-n-u.c [2019-11-23 20:42:17,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ee41fc4a/f08fa442f1b54268b45e6f43489f0fd6/FLAGc1be3a977 [2019-11-23 20:42:18,398 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ee41fc4a/f08fa442f1b54268b45e6f43489f0fd6 [2019-11-23 20:42:18,406 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:42:18,408 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:42:18,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:42:18,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:42:18,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:42:18,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:42:18" (1/1) ... [2019-11-23 20:42:18,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ef28fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18, skipping insertion in model container [2019-11-23 20:42:18,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:42:18" (1/1) ... [2019-11-23 20:42:18,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:42:18,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:42:18,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:42:18,671 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:42:18,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:42:18,710 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:42:18,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18 WrapperNode [2019-11-23 20:42:18,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:42:18,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:42:18,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:42:18,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:42:18,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18" (1/1) ... [2019-11-23 20:42:18,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18" (1/1) ... [2019-11-23 20:42:18,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:42:18,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:42:18,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:42:18,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:42:18,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18" (1/1) ... [2019-11-23 20:42:18,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18" (1/1) ... [2019-11-23 20:42:18,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18" (1/1) ... [2019-11-23 20:42:18,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18" (1/1) ... [2019-11-23 20:42:18,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18" (1/1) ... [2019-11-23 20:42:18,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18" (1/1) ... [2019-11-23 20:42:18,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18" (1/1) ... [2019-11-23 20:42:18,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:42:18,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:42:18,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:42:18,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:42:18,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18" (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 [2019-11-23 20:42:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:42:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:42:18,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:42:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:42:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:42:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:42:19,138 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:42:19,139 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 20:42:19,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:42:19 BoogieIcfgContainer [2019-11-23 20:42:19,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:42:19,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:42:19,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:42:19,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:42:19,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:42:18" (1/3) ... [2019-11-23 20:42:19,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7efb818d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:42:19, skipping insertion in model container [2019-11-23 20:42:19,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:18" (2/3) ... [2019-11-23 20:42:19,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7efb818d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:42:19, skipping insertion in model container [2019-11-23 20:42:19,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:42:19" (3/3) ... [2019-11-23 20:42:19,147 INFO L109 eAbstractionObserver]: Analyzing ICFG init-non-constant-2-n-u.c [2019-11-23 20:42:19,157 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:42:19,164 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:42:19,176 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:42:19,233 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:42:19,233 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:42:19,233 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:42:19,234 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:42:19,234 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:42:19,234 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:42:19,234 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:42:19,234 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:42:19,256 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-23 20:42:19,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:42:19,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:19,265 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:19,265 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:19,271 INFO L82 PathProgramCache]: Analyzing trace with hash 252221889, now seen corresponding path program 1 times [2019-11-23 20:42:19,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:19,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294302651] [2019-11-23 20:42:19,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:19,356 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:19,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734737047] [2019-11-23 20:42:19,357 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 [2019-11-23 20:42:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:19,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:42:19,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:19,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294302651] [2019-11-23 20:42:19,497 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:19,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734737047] [2019-11-23 20:42:19,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:19,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 20:42:19,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942294001] [2019-11-23 20:42:19,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:42:19,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:19,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:42:19,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:42:19,521 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2019-11-23 20:42:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:19,628 INFO L93 Difference]: Finished difference Result 52 states and 77 transitions. [2019-11-23 20:42:19,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:42:19,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-23 20:42:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:19,646 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:42:19,646 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:42:19,653 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:42:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:42:19,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2019-11-23 20:42:19,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 20:42:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-11-23 20:42:19,687 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2019-11-23 20:42:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:19,687 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-11-23 20:42:19,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:42:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-11-23 20:42:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:42:19,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:19,689 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:19,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:19,890 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:19,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1550338388, now seen corresponding path program 1 times [2019-11-23 20:42:19,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:19,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975147460] [2019-11-23 20:42:19,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:19,899 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:19,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027048381] [2019-11-23 20:42:19,900 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 [2019-11-23 20:42:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:19,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:42:19,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:19,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975147460] [2019-11-23 20:42:19,988 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:19,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027048381] [2019-11-23 20:42:19,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:19,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 20:42:19,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45028520] [2019-11-23 20:42:19,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:42:19,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:19,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:42:19,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:42:19,992 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 5 states. [2019-11-23 20:42:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:20,079 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2019-11-23 20:42:20,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:42:20,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-23 20:42:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:20,081 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:42:20,081 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:42:20,082 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:42:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:42:20,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2019-11-23 20:42:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:42:20,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-23 20:42:20,087 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2019-11-23 20:42:20,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:20,087 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-23 20:42:20,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:42:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-23 20:42:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:42:20,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:20,088 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:20,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:20,289 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:20,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:20,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2127602064, now seen corresponding path program 1 times [2019-11-23 20:42:20,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:20,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940177498] [2019-11-23 20:42:20,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:20,296 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:20,296 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852565995] [2019-11-23 20:42:20,296 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 [2019-11-23 20:42:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:20,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:42:20,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:20,394 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-23 20:42:20,394 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:20,398 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:20,398 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:42:20,399 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-23 20:42:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:20,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940177498] [2019-11-23 20:42:20,444 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:20,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852565995] [2019-11-23 20:42:20,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:20,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:42:20,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501583624] [2019-11-23 20:42:20,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:42:20,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:20,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:42:20,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:42:20,446 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 8 states. [2019-11-23 20:42:20,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:20,606 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2019-11-23 20:42:20,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:42:20,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-11-23 20:42:20,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:20,609 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:42:20,609 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:42:20,611 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:42:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:42:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 24. [2019-11-23 20:42:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:42:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-11-23 20:42:20,618 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 12 [2019-11-23 20:42:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:20,619 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-11-23 20:42:20,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:42:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-11-23 20:42:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:42:20,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:20,620 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:20,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:20,824 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:20,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:20,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1739107871, now seen corresponding path program 1 times [2019-11-23 20:42:20,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:20,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992202648] [2019-11-23 20:42:20,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:20,831 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:20,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895951030] [2019-11-23 20:42:20,831 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 [2019-11-23 20:42:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:20,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:42:20,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:20,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992202648] [2019-11-23 20:42:20,924 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:20,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895951030] [2019-11-23 20:42:20,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:20,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:42:20,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882514353] [2019-11-23 20:42:20,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:42:20,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:20,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:42:20,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:42:20,927 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 7 states. [2019-11-23 20:42:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:21,065 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2019-11-23 20:42:21,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:42:21,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-23 20:42:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:21,067 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:42:21,069 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:42:21,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:42:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:42:21,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2019-11-23 20:42:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:42:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2019-11-23 20:42:21,089 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 15 [2019-11-23 20:42:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:21,089 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2019-11-23 20:42:21,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:42:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2019-11-23 20:42:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:42:21,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:21,094 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:21,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:21,295 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:21,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:21,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1140208543, now seen corresponding path program 2 times [2019-11-23 20:42:21,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:21,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261903850] [2019-11-23 20:42:21,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:21,302 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:21,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643008336] [2019-11-23 20:42:21,303 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 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 [2019-11-23 20:42:21,346 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:42:21,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:21,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:42:21,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:21,382 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2019-11-23 20:42:21,382 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:21,390 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:21,391 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:42:21,391 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2019-11-23 20:42:21,447 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:21,448 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2019-11-23 20:42:21,449 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:21,466 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:21,467 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-23 20:42:21,468 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:39 [2019-11-23 20:42:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:21,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261903850] [2019-11-23 20:42:21,623 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:21,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643008336] [2019-11-23 20:42:21,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:21,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 20:42:21,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821963762] [2019-11-23 20:42:21,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:42:21,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:21,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:42:21,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:42:21,629 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 11 states. [2019-11-23 20:42:22,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:22,204 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2019-11-23 20:42:22,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:42:22,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-11-23 20:42:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:22,206 INFO L225 Difference]: With dead ends: 101 [2019-11-23 20:42:22,207 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:42:22,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:42:22,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:42:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 37. [2019-11-23 20:42:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:42:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-23 20:42:22,221 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 16 [2019-11-23 20:42:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:22,221 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-23 20:42:22,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:42:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-23 20:42:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:42:22,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:22,222 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:22,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:22,427 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:22,428 INFO L82 PathProgramCache]: Analyzing trace with hash -572599325, now seen corresponding path program 2 times [2019-11-23 20:42:22,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:22,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337539440] [2019-11-23 20:42:22,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:22,434 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:22,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268786547] [2019-11-23 20:42:22,434 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 [2019-11-23 20:42:22,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:42:22,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:22,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:42:22,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:22,528 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:42:22,529 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:22,533 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:22,533 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:42:22,534 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:42:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:22,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337539440] [2019-11-23 20:42:22,591 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:22,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268786547] [2019-11-23 20:42:22,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:22,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 20:42:22,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607331333] [2019-11-23 20:42:22,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:42:22,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:42:22,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:42:22,594 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 10 states. [2019-11-23 20:42:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:22,805 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2019-11-23 20:42:22,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:42:22,806 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-23 20:42:22,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:22,807 INFO L225 Difference]: With dead ends: 97 [2019-11-23 20:42:22,807 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:42:22,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:42:22,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:42:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 49. [2019-11-23 20:42:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:42:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2019-11-23 20:42:22,824 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 16 [2019-11-23 20:42:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:22,824 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2019-11-23 20:42:22,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:42:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2019-11-23 20:42:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:42:22,825 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:22,826 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:23,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:23,038 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:23,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:23,039 INFO L82 PathProgramCache]: Analyzing trace with hash -474454035, now seen corresponding path program 1 times [2019-11-23 20:42:23,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:23,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776469746] [2019-11-23 20:42:23,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:23,044 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:23,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830086102] [2019-11-23 20:42:23,044 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 [2019-11-23 20:42:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:23,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:42:23,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:42:23,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776469746] [2019-11-23 20:42:23,127 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:23,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830086102] [2019-11-23 20:42:23,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:23,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:42:23,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653544589] [2019-11-23 20:42:23,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:42:23,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:23,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:42:23,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:42:23,129 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 7 states. [2019-11-23 20:42:23,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:23,224 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2019-11-23 20:42:23,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:42:23,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-23 20:42:23,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:23,226 INFO L225 Difference]: With dead ends: 118 [2019-11-23 20:42:23,226 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:42:23,227 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:42:23,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:42:23,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 54. [2019-11-23 20:42:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:42:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2019-11-23 20:42:23,242 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 18 [2019-11-23 20:42:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:23,243 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2019-11-23 20:42:23,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:42:23,243 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2019-11-23 20:42:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:42:23,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:23,244 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:23,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:23,447 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:23,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1308450764, now seen corresponding path program 3 times [2019-11-23 20:42:23,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:23,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600429579] [2019-11-23 20:42:23,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:23,453 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:23,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043865751] [2019-11-23 20:42:23,454 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 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 [2019-11-23 20:42:23,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:42:23,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:23,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:42:23,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:23,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600429579] [2019-11-23 20:42:23,580 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:23,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043865751] [2019-11-23 20:42:23,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:23,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:42:23,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465476556] [2019-11-23 20:42:23,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:42:23,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:23,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:42:23,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:42:23,588 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand 9 states. [2019-11-23 20:42:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:23,735 INFO L93 Difference]: Finished difference Result 151 states and 183 transitions. [2019-11-23 20:42:23,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:42:23,736 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-11-23 20:42:23,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:23,737 INFO L225 Difference]: With dead ends: 151 [2019-11-23 20:42:23,738 INFO L226 Difference]: Without dead ends: 105 [2019-11-23 20:42:23,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:42:23,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-23 20:42:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2019-11-23 20:42:23,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 20:42:23,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2019-11-23 20:42:23,774 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 19 [2019-11-23 20:42:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:23,774 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2019-11-23 20:42:23,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:42:23,775 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2019-11-23 20:42:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:42:23,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:23,779 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:23,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:23,986 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:23,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:23,987 INFO L82 PathProgramCache]: Analyzing trace with hash -849149040, now seen corresponding path program 4 times [2019-11-23 20:42:23,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:23,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695022509] [2019-11-23 20:42:23,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:23,993 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:23,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559919711] [2019-11-23 20:42:23,994 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 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 [2019-11-23 20:42:24,028 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:42:24,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:24,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:42:24,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:24,072 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-11-23 20:42:24,072 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:24,080 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:24,081 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:42:24,081 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2019-11-23 20:42:24,100 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:24,101 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2019-11-23 20:42:24,102 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:24,109 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:24,109 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:42:24,109 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-11-23 20:42:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:24,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695022509] [2019-11-23 20:42:24,221 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:24,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559919711] [2019-11-23 20:42:24,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:24,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 20:42:24,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955484613] [2019-11-23 20:42:24,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:42:24,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:24,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:42:24,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:42:24,223 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 12 states. [2019-11-23 20:42:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:24,452 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2019-11-23 20:42:24,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:42:24,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-11-23 20:42:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:24,455 INFO L225 Difference]: With dead ends: 89 [2019-11-23 20:42:24,455 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:42:24,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:42:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:42:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2019-11-23 20:42:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:42:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2019-11-23 20:42:24,483 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 20 [2019-11-23 20:42:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:24,483 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2019-11-23 20:42:24,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:42:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2019-11-23 20:42:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:42:24,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:24,485 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:24,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:24,696 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:24,697 INFO L82 PathProgramCache]: Analyzing trace with hash -149402034, now seen corresponding path program 5 times [2019-11-23 20:42:24,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:24,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056146003] [2019-11-23 20:42:24,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:24,705 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:24,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092917134] [2019-11-23 20:42:24,706 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-23 20:42:24,794 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-23 20:42:24,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:24,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:42:24,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:24,846 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-11-23 20:42:24,846 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:24,857 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:24,858 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:42:24,858 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2019-11-23 20:42:24,920 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:24,921 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2019-11-23 20:42:24,921 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:24,934 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:24,934 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:42:24,935 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2019-11-23 20:42:24,972 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:24,974 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:24,975 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:24,976 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:24,977 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2019-11-23 20:42:24,977 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:24,991 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:24,992 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:42:24,992 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:51 [2019-11-23 20:42:25,149 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:25,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056146003] [2019-11-23 20:42:25,172 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:25,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092917134] [2019-11-23 20:42:25,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:25,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 20:42:25,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946329720] [2019-11-23 20:42:25,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:42:25,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:25,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:42:25,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:42:25,174 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand 14 states. [2019-11-23 20:42:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:28,070 INFO L93 Difference]: Finished difference Result 186 states and 235 transitions. [2019-11-23 20:42:28,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:42:28,071 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-11-23 20:42:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:28,072 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:42:28,072 INFO L226 Difference]: Without dead ends: 184 [2019-11-23 20:42:28,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:42:28,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-23 20:42:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 117. [2019-11-23 20:42:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-23 20:42:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 149 transitions. [2019-11-23 20:42:28,095 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 149 transitions. Word has length 21 [2019-11-23 20:42:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:28,095 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 149 transitions. [2019-11-23 20:42:28,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:42:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 149 transitions. [2019-11-23 20:42:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:42:28,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:28,097 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:28,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:28,300 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:28,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:28,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1066425820, now seen corresponding path program 2 times [2019-11-23 20:42:28,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:28,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629801752] [2019-11-23 20:42:28,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:28,305 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:28,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550929478] [2019-11-23 20:42:28,306 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 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 [2019-11-23 20:42:28,339 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:42:28,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:28,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:42:28,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:28,368 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-11-23 20:42:28,369 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:28,375 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:28,375 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:42:28,376 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-23 20:42:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:42:28,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629801752] [2019-11-23 20:42:28,449 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:28,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550929478] [2019-11-23 20:42:28,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:28,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 20:42:28,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131014447] [2019-11-23 20:42:28,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:42:28,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:28,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:42:28,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:42:28,451 INFO L87 Difference]: Start difference. First operand 117 states and 149 transitions. Second operand 10 states. [2019-11-23 20:42:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:28,650 INFO L93 Difference]: Finished difference Result 200 states and 246 transitions. [2019-11-23 20:42:28,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:42:28,650 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-23 20:42:28,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:28,652 INFO L225 Difference]: With dead ends: 200 [2019-11-23 20:42:28,652 INFO L226 Difference]: Without dead ends: 198 [2019-11-23 20:42:28,653 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:42:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-11-23 20:42:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 127. [2019-11-23 20:42:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-23 20:42:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 160 transitions. [2019-11-23 20:42:28,678 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 160 transitions. Word has length 22 [2019-11-23 20:42:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:28,679 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 160 transitions. [2019-11-23 20:42:28,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:42:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 160 transitions. [2019-11-23 20:42:28,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:42:28,680 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:28,680 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:28,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:28,884 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash 363164927, now seen corresponding path program 6 times [2019-11-23 20:42:28,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:28,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326291114] [2019-11-23 20:42:28,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:28,891 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:28,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535616914] [2019-11-23 20:42:28,891 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:28,928 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:42:28,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:28,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:42:28,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:28,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326291114] [2019-11-23 20:42:28,998 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:28,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535616914] [2019-11-23 20:42:28,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:28,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 20:42:28,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861064297] [2019-11-23 20:42:28,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:42:28,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:29,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:42:29,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:42:29,000 INFO L87 Difference]: Start difference. First operand 127 states and 160 transitions. Second operand 11 states. [2019-11-23 20:42:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:29,247 INFO L93 Difference]: Finished difference Result 324 states and 408 transitions. [2019-11-23 20:42:29,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:42:29,247 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2019-11-23 20:42:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:29,249 INFO L225 Difference]: With dead ends: 324 [2019-11-23 20:42:29,249 INFO L226 Difference]: Without dead ends: 235 [2019-11-23 20:42:29,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:42:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-11-23 20:42:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 179. [2019-11-23 20:42:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-11-23 20:42:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 233 transitions. [2019-11-23 20:42:29,280 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 233 transitions. Word has length 23 [2019-11-23 20:42:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:29,281 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 233 transitions. [2019-11-23 20:42:29,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:42:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 233 transitions. [2019-11-23 20:42:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:42:29,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:29,282 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:29,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:29,486 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:29,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:29,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1582012099, now seen corresponding path program 7 times [2019-11-23 20:42:29,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:29,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084333967] [2019-11-23 20:42:29,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:29,491 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:29,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130711906] [2019-11-23 20:42:29,491 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:29,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:42:29,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:29,585 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:42:29,586 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:29,589 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:29,590 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:42:29,590 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:42:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:29,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084333967] [2019-11-23 20:42:29,722 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:29,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130711906] [2019-11-23 20:42:29,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:29,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 20:42:29,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639164612] [2019-11-23 20:42:29,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:42:29,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:29,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:42:29,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:42:29,724 INFO L87 Difference]: Start difference. First operand 179 states and 233 transitions. Second operand 14 states. [2019-11-23 20:42:30,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:30,047 INFO L93 Difference]: Finished difference Result 242 states and 306 transitions. [2019-11-23 20:42:30,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:42:30,048 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2019-11-23 20:42:30,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:30,049 INFO L225 Difference]: With dead ends: 242 [2019-11-23 20:42:30,049 INFO L226 Difference]: Without dead ends: 240 [2019-11-23 20:42:30,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:42:30,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-11-23 20:42:30,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 182. [2019-11-23 20:42:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-11-23 20:42:30,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 236 transitions. [2019-11-23 20:42:30,091 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 236 transitions. Word has length 24 [2019-11-23 20:42:30,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:30,091 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 236 transitions. [2019-11-23 20:42:30,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:42:30,092 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 236 transitions. [2019-11-23 20:42:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:42:30,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:30,092 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:30,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:30,293 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:30,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:30,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1636680779, now seen corresponding path program 3 times [2019-11-23 20:42:30,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:30,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070630328] [2019-11-23 20:42:30,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:30,303 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:30,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801647268] [2019-11-23 20:42:30,304 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 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 [2019-11-23 20:42:30,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:42:30,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:30,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:42:30,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:30,381 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2019-11-23 20:42:30,381 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:30,395 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:30,396 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:42:30,396 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2019-11-23 20:42:30,450 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:30,451 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-11-23 20:42:30,452 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:30,465 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:30,466 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-23 20:42:30,467 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:45 [2019-11-23 20:42:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:42:30,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070630328] [2019-11-23 20:42:30,614 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:30,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801647268] [2019-11-23 20:42:30,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:30,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 20:42:30,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024770711] [2019-11-23 20:42:30,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:42:30,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:30,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:42:30,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:42:30,616 INFO L87 Difference]: Start difference. First operand 182 states and 236 transitions. Second operand 13 states. [2019-11-23 20:42:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:31,169 INFO L93 Difference]: Finished difference Result 359 states and 467 transitions. [2019-11-23 20:42:31,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:42:31,169 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2019-11-23 20:42:31,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:31,171 INFO L225 Difference]: With dead ends: 359 [2019-11-23 20:42:31,171 INFO L226 Difference]: Without dead ends: 357 [2019-11-23 20:42:31,172 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:42:31,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2019-11-23 20:42:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 195. [2019-11-23 20:42:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-11-23 20:42:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 254 transitions. [2019-11-23 20:42:31,206 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 254 transitions. Word has length 26 [2019-11-23 20:42:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:31,207 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 254 transitions. [2019-11-23 20:42:31,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:42:31,207 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 254 transitions. [2019-11-23 20:42:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:42:31,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:31,208 INFO L410 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:31,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:31,410 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:31,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:31,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1622040893, now seen corresponding path program 8 times [2019-11-23 20:42:31,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:31,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146105343] [2019-11-23 20:42:31,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:31,415 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:31,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880043719] [2019-11-23 20:42:31,415 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:31,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:42:31,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:31,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:42:31,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:31,506 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-11-23 20:42:31,506 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:31,514 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:31,515 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:42:31,515 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2019-11-23 20:42:31,563 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:31,564 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2019-11-23 20:42:31,564 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:31,578 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:31,578 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:42:31,579 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:48 [2019-11-23 20:42:31,621 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:31,624 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:31,625 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:31,626 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:31,626 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 56 [2019-11-23 20:42:31,627 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:31,646 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:31,647 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-23 20:42:31,648 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:71, output treesize:67 [2019-11-23 20:42:31,798 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:31,802 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:31,803 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:31,804 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:31,838 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:31,838 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 206 [2019-11-23 20:42:31,840 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:31,942 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2019-11-23 20:42:31,943 INFO L567 ElimStorePlain]: treesize reduction 84, result has 63.0 percent of original size [2019-11-23 20:42:31,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:31,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:31,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:31,955 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-23 20:42:31,955 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:103, output treesize:143 [2019-11-23 20:42:31,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:31,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:31,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:32,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:32,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:32,069 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:32,090 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,092 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,094 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,097 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,099 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,103 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,145 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 189 [2019-11-23 20:42:32,146 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:32,159 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:42:32,159 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:32,187 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,189 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,197 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,217 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,219 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,222 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,330 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:32,331 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 122 treesize of output 310 [2019-11-23 20:42:32,333 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:32,351 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,357 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,365 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,366 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,367 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:42:32,393 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:32,394 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 253 [2019-11-23 20:42:32,396 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:33,192 WARN L192 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 87 [2019-11-23 20:42:33,194 INFO L567 ElimStorePlain]: treesize reduction 239, result has 68.3 percent of original size [2019-11-23 20:42:33,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:33,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:33,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:33,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:33,205 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 16 dim-0 vars, and 3 xjuncts. [2019-11-23 20:42:33,206 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:737, output treesize:516 [2019-11-23 20:42:33,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:33,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:33,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:33,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:58,414 WARN L192 SmtUtils]: Spent 22.51 s on a formula simplification that was a NOOP. DAG size: 151 [2019-11-23 20:42:58,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:58,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:58,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:42:58,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms