/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/rev-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:51:10,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:51:10,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:51:10,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:51:10,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:51:10,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:51:10,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:51:10,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:51:10,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:51:10,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:51:10,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:51:10,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:51:10,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:51:10,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:51:10,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:51:10,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:51:10,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:51:10,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:51:10,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:51:10,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:51:10,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:51:10,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:51:10,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:51:10,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:51:10,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:51:10,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:51:10,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:51:10,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:51:10,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:51:10,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:51:10,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:51:10,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:51:10,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:51:10,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:51:10,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:51:10,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:51:10,406 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 [2019-11-06 18:51:10,443 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:51:10,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:51:10,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:51:10,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:51:10,447 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:51:10,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:51:10,449 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:51:10,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:51:10,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:51:10,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:51:10,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:51:10,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:51:10,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:51:10,451 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:51:10,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:51:10,451 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:51:10,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:51:10,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:51:10,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:51:10,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:51:10,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:51:10,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:51:10,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:51:10,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:51:10,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:51:10,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:51:10,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:51:10,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:51:10,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:51:10,709 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:51:10,721 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:51:10,725 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:51:10,726 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:51:10,726 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:51:10,727 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/rev-2-n-u.c [2019-11-06 18:51:10,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c3bd8e40/9678331ee05c4c5eaef311482adf33b4/FLAG9c49b6114 [2019-11-06 18:51:11,226 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:51:11,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/rev-2-n-u.c [2019-11-06 18:51:11,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c3bd8e40/9678331ee05c4c5eaef311482adf33b4/FLAG9c49b6114 [2019-11-06 18:51:11,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c3bd8e40/9678331ee05c4c5eaef311482adf33b4 [2019-11-06 18:51:11,651 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:51:11,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:51:11,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:51:11,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:51:11,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:51:11,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:51:11" (1/1) ... [2019-11-06 18:51:11,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9639fc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:11, skipping insertion in model container [2019-11-06 18:51:11,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:51:11" (1/1) ... [2019-11-06 18:51:11,668 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:51:11,685 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:51:11,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:51:11,869 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:51:11,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:51:11,912 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:51:11,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:11 WrapperNode [2019-11-06 18:51:11,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:51:11,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:51:11,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:51:11,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:51:12,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:11" (1/1) ... [2019-11-06 18:51:12,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:11" (1/1) ... [2019-11-06 18:51:12,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:11" (1/1) ... [2019-11-06 18:51:12,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:11" (1/1) ... [2019-11-06 18:51:12,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:11" (1/1) ... [2019-11-06 18:51:12,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:11" (1/1) ... [2019-11-06 18:51:12,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:11" (1/1) ... [2019-11-06 18:51:12,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:51:12,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:51:12,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:51:12,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:51:12,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:51:12,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:51:12,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:51:12,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:51:12,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:51:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:51:12,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:51:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:51:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:51:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:51:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:51:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:51:12,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:51:12,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:51:12,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:51:12,484 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:51:12,484 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 18:51:12,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:51:12 BoogieIcfgContainer [2019-11-06 18:51:12,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:51:12,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:51:12,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:51:12,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:51:12,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:51:11" (1/3) ... [2019-11-06 18:51:12,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b1250e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:51:12, skipping insertion in model container [2019-11-06 18:51:12,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:11" (2/3) ... [2019-11-06 18:51:12,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b1250e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:51:12, skipping insertion in model container [2019-11-06 18:51:12,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:51:12" (3/3) ... [2019-11-06 18:51:12,494 INFO L109 eAbstractionObserver]: Analyzing ICFG rev-2-n-u.c [2019-11-06 18:51:12,504 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:51:12,512 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:51:12,524 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:51:12,549 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:51:12,549 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:51:12,549 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:51:12,549 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:51:12,549 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:51:12,550 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:51:12,550 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:51:12,550 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:51:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-06 18:51:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:51:12,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:12,575 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:12,578 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:12,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:12,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1035913628, now seen corresponding path program 1 times [2019-11-06 18:51:12,593 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:12,593 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487104055] [2019-11-06 18:51:12,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:12,682 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:12,683 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265517952] [2019-11-06 18:51:12,683 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 [2019-11-06 18:51:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:12,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:51:12,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:51:12,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487104055] [2019-11-06 18:51:12,809 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:12,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265517952] [2019-11-06 18:51:12,810 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:51:12,810 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:51:12,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436189023] [2019-11-06 18:51:12,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:51:12,817 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:12,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:51:12,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:51:12,835 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2019-11-06 18:51:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:12,919 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2019-11-06 18:51:12,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:51:12,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-06 18:51:12,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:12,932 INFO L225 Difference]: With dead ends: 57 [2019-11-06 18:51:12,932 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:51:12,937 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:51:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:51:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-06 18:51:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:51:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-11-06 18:51:12,975 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-11-06 18:51:12,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:12,975 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-11-06 18:51:12,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:51:12,976 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-11-06 18:51:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:51:12,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:12,977 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:13,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:13,182 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:13,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:13,183 INFO L82 PathProgramCache]: Analyzing trace with hash 573516244, now seen corresponding path program 1 times [2019-11-06 18:51:13,184 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:13,184 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371910704] [2019-11-06 18:51:13,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:13,196 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:13,196 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099928959] [2019-11-06 18:51:13,197 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 [2019-11-06 18:51:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:13,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:51:13,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:51:13,336 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371910704] [2019-11-06 18:51:13,336 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:13,337 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099928959] [2019-11-06 18:51:13,337 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:51:13,337 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:51:13,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140076424] [2019-11-06 18:51:13,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:51:13,340 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:13,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:51:13,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:51:13,342 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-11-06 18:51:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:13,446 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2019-11-06 18:51:13,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:51:13,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-06 18:51:13,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:13,449 INFO L225 Difference]: With dead ends: 53 [2019-11-06 18:51:13,449 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:51:13,450 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:51:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:51:13,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-11-06 18:51:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:51:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-06 18:51:13,462 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 19 [2019-11-06 18:51:13,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:13,462 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-06 18:51:13,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:51:13,462 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-06 18:51:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:51:13,463 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:13,463 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:13,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:13,667 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:13,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:13,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1173975853, now seen corresponding path program 1 times [2019-11-06 18:51:13,669 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:13,669 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675854641] [2019-11-06 18:51:13,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:13,679 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:13,680 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387689070] [2019-11-06 18:51:13,680 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 [2019-11-06 18:51:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:13,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:51:13,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:51:13,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675854641] [2019-11-06 18:51:13,785 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:13,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387689070] [2019-11-06 18:51:13,786 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:13,786 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:51:13,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592159188] [2019-11-06 18:51:13,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:51:13,792 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:13,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:51:13,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:51:13,792 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2019-11-06 18:51:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:13,899 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2019-11-06 18:51:13,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:51:13,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-06 18:51:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:13,902 INFO L225 Difference]: With dead ends: 61 [2019-11-06 18:51:13,902 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 18:51:13,903 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:51:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 18:51:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2019-11-06 18:51:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:51:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-06 18:51:13,916 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2019-11-06 18:51:13,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:13,916 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-06 18:51:13,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:51:13,916 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-06 18:51:13,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:51:13,917 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:13,917 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:14,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:14,128 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:14,128 INFO L82 PathProgramCache]: Analyzing trace with hash 488343988, now seen corresponding path program 2 times [2019-11-06 18:51:14,129 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:14,129 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194173406] [2019-11-06 18:51:14,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:14,137 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:14,138 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019414116] [2019-11-06 18:51:14,138 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 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 [2019-11-06 18:51:14,199 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 18:51:14,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:14,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:51:14,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:51:14,226 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194173406] [2019-11-06 18:51:14,226 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:14,226 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019414116] [2019-11-06 18:51:14,227 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:51:14,227 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:51:14,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088560037] [2019-11-06 18:51:14,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:51:14,228 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:14,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:51:14,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:51:14,228 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 4 states. [2019-11-06 18:51:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:14,311 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-11-06 18:51:14,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:51:14,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-06 18:51:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:14,314 INFO L225 Difference]: With dead ends: 68 [2019-11-06 18:51:14,314 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:51:14,314 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:51:14,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:51:14,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2019-11-06 18:51:14,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:51:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-11-06 18:51:14,334 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 21 [2019-11-06 18:51:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:14,337 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-11-06 18:51:14,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:51:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-11-06 18:51:14,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:51:14,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:14,339 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:14,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:14,542 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:14,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:14,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1641208904, now seen corresponding path program 1 times [2019-11-06 18:51:14,543 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:14,543 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142709943] [2019-11-06 18:51:14,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:14,552 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:14,552 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998953603] [2019-11-06 18:51:14,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:14,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:51:14,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:51:14,642 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142709943] [2019-11-06 18:51:14,643 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:14,643 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998953603] [2019-11-06 18:51:14,643 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:14,643 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 18:51:14,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066838414] [2019-11-06 18:51:14,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:51:14,644 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:14,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:51:14,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:51:14,645 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 6 states. [2019-11-06 18:51:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:14,755 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2019-11-06 18:51:14,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:51:14,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-06 18:51:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:14,757 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:51:14,757 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:51:14,760 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:51:14,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:51:14,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-11-06 18:51:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:51:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-11-06 18:51:14,776 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2019-11-06 18:51:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:14,777 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-11-06 18:51:14,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:51:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-11-06 18:51:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:51:14,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:14,779 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:14,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:14,987 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:14,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1483393922, now seen corresponding path program 2 times [2019-11-06 18:51:14,988 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:14,988 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289842091] [2019-11-06 18:51:14,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:14,996 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:14,997 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390704736] [2019-11-06 18:51:14,997 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 [2019-11-06 18:51:15,043 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:51:15,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:15,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:51:15,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:51:15,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289842091] [2019-11-06 18:51:15,093 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:15,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390704736] [2019-11-06 18:51:15,094 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:15,094 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:51:15,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987122621] [2019-11-06 18:51:15,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:51:15,096 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:15,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:51:15,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:51:15,097 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 5 states. [2019-11-06 18:51:15,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:15,190 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2019-11-06 18:51:15,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:51:15,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-11-06 18:51:15,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:15,192 INFO L225 Difference]: With dead ends: 113 [2019-11-06 18:51:15,192 INFO L226 Difference]: Without dead ends: 86 [2019-11-06 18:51:15,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:51:15,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-06 18:51:15,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 52. [2019-11-06 18:51:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:51:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-11-06 18:51:15,205 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 28 [2019-11-06 18:51:15,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:15,205 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-11-06 18:51:15,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:51:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-11-06 18:51:15,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:51:15,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:15,207 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:15,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:15,410 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:15,410 INFO L82 PathProgramCache]: Analyzing trace with hash -347991136, now seen corresponding path program 3 times [2019-11-06 18:51:15,410 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:15,410 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352911184] [2019-11-06 18:51:15,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:15,418 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:15,419 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076237416] [2019-11-06 18:51:15,419 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:15,495 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-06 18:51:15,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:15,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-06 18:51:15,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:15,547 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-06 18:51:15,548 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:51:15,562 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:51:15,563 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:51:15,563 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-06 18:51:15,648 INFO L375 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 36 treesize of output 36 [2019-11-06 18:51:15,648 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:51:15,667 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:51:15,668 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:51:15,668 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:55 [2019-11-06 18:51:15,709 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:15,711 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:15,715 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 80 [2019-11-06 18:51:15,716 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:51:15,747 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:51:15,749 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. [2019-11-06 18:51:15,749 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:102, output treesize:98 [2019-11-06 18:51:15,831 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:15,833 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:15,834 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:15,835 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:15,837 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:15,838 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:15,840 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 99 [2019-11-06 18:51:15,842 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:51:15,874 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:51:15,875 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. [2019-11-06 18:51:15,877 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:108 [2019-11-06 18:51:15,956 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:15,957 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:15,958 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:15,959 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:15,960 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:15,961 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:16,036 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:51:16,037 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 389 [2019-11-06 18:51:16,040 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:51:16,153 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2019-11-06 18:51:16,154 INFO L567 ElimStorePlain]: treesize reduction 432, result has 25.9 percent of original size [2019-11-06 18:51:16,155 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-06 18:51:16,156 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:155, output treesize:151 [2019-11-06 18:51:16,227 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:16,228 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:16,229 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:16,231 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:16,232 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:16,234 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:16,398 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-11-06 18:51:16,398 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:51:16,399 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 164 treesize of output 717 [2019-11-06 18:51:16,405 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:51:16,565 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 75 [2019-11-06 18:51:16,565 INFO L567 ElimStorePlain]: treesize reduction 950, result has 17.0 percent of original size [2019-11-06 18:51:16,568 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. [2019-11-06 18:51:16,568 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:198, output treesize:194 [2019-11-06 18:51:16,630 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:16,631 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:16,632 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:16,633 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:16,634 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:16,636 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:16,795 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-11-06 18:51:16,795 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:51:16,796 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 164 treesize of output 717 [2019-11-06 18:51:16,801 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:51:17,016 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 75 [2019-11-06 18:51:17,017 INFO L567 ElimStorePlain]: treesize reduction 1022, result has 16.0 percent of original size [2019-11-06 18:51:17,020 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. [2019-11-06 18:51:17,020 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:198, output treesize:194 [2019-11-06 18:51:25,604 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:25,605 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:25,606 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:25,609 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:25,613 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:25,614 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:25,616 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:25,620 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:51:25,642 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:51:25,643 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 89 [2019-11-06 18:51:25,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:51:25,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:51:25,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:51:25,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:51:25,649 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:51:25,664 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:51:25,665 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:51:25,665 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:102, output treesize:3 [2019-11-06 18:51:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:51:25,744 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352911184] [2019-11-06 18:51:25,744 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:25,745 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076237416] [2019-11-06 18:51:25,745 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:25,745 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-06 18:51:25,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048651882] [2019-11-06 18:51:25,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:51:25,745 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:25,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:51:25,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=206, Unknown=4, NotChecked=0, Total=272 [2019-11-06 18:51:25,746 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 17 states. [2019-11-06 18:51:28,219 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-06 18:51:34,933 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 84 [2019-11-06 18:51:57,404 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87