/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/nla-digbench/prodbin.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:26:31,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:26:31,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:26:31,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:26:31,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:26:31,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:26:31,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:26:31,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:26:31,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:26:31,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:26:31,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:26:31,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:26:31,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:26:31,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:26:31,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:26:31,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:26:31,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:26:31,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:26:31,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:26:31,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:26:31,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:26:31,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:26:31,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:26:31,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:26:31,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:26:31,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:26:31,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:26:31,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:26:31,466 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 21:26:31,486 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:26:31,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:26:31,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:26:31,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:26:31,487 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:26:31,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:26:31,488 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:26:31,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:26:31,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:26:31,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:26:31,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:26:31,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:26:31,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:26:31,489 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:26:31,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:26:31,489 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:26:31,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:26:31,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:26:31,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:26:31,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:26:31,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:26:31,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:26:31,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:26:31,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:26:31,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:26:31,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:26:31,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:26:31,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:26:31,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:26:31,761 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:26:31,773 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:26:31,777 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:26:31,778 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:26:31,779 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:26:31,779 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prodbin.c [2019-11-06 21:26:31,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/421d38c18/22724f6ea0954f7b9239d5aff5a8be66/FLAG4714ec695 [2019-11-06 21:26:32,291 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:26:32,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prodbin.c [2019-11-06 21:26:32,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/421d38c18/22724f6ea0954f7b9239d5aff5a8be66/FLAG4714ec695 [2019-11-06 21:26:32,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/421d38c18/22724f6ea0954f7b9239d5aff5a8be66 [2019-11-06 21:26:32,699 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:26:32,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:26:32,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:26:32,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:26:32,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:26:32,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:32,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9e92733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32, skipping insertion in model container [2019-11-06 21:26:32,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:32,717 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:26:32,739 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:26:32,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:26:32,940 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:26:32,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:26:32,981 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:26:32,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32 WrapperNode [2019-11-06 21:26:32,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:26:32,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:26:32,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:26:32,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:26:33,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:33,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:33,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:33,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:33,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:33,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:33,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:33,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:26:33,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:26:33,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:26:33,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:26:33,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (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 21:26:33,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:26:33,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:26:33,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:26:33,167 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:26:33,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:26:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2019-11-06 21:26:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 21:26:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:26:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:26:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:26:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:26:33,348 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:26:33,348 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:26:33,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:26:33 BoogieIcfgContainer [2019-11-06 21:26:33,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:26:33,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:26:33,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:26:33,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:26:33,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:26:32" (1/3) ... [2019-11-06 21:26:33,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e76b2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:26:33, skipping insertion in model container [2019-11-06 21:26:33,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (2/3) ... [2019-11-06 21:26:33,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e76b2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:26:33, skipping insertion in model container [2019-11-06 21:26:33,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:26:33" (3/3) ... [2019-11-06 21:26:33,357 INFO L109 eAbstractionObserver]: Analyzing ICFG prodbin.c [2019-11-06 21:26:33,367 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:26:33,375 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:26:33,390 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:26:33,452 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:26:33,452 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:26:33,453 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:26:33,453 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:26:33,453 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:26:33,453 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:26:33,453 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:26:33,455 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:26:33,484 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-06 21:26:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:26:33,491 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:33,492 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:33,494 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:33,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1560104174, now seen corresponding path program 1 times [2019-11-06 21:26:33,512 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:33,513 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777321584] [2019-11-06 21:26:33,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:33,610 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 21:26:33,611 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777321584] [2019-11-06 21:26:33,611 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:26:33,612 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 21:26:33,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147126732] [2019-11-06 21:26:33,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 21:26:33,618 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:33,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 21:26:33,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:26:33,634 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-11-06 21:26:33,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:33,659 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-11-06 21:26:33,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 21:26:33,660 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-06 21:26:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:33,670 INFO L225 Difference]: With dead ends: 39 [2019-11-06 21:26:33,671 INFO L226 Difference]: Without dead ends: 17 [2019-11-06 21:26:33,674 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:26:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-06 21:26:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-06 21:26:33,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-06 21:26:33,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-06 21:26:33,716 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2019-11-06 21:26:33,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:33,717 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-06 21:26:33,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 21:26:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-06 21:26:33,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:26:33,718 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:33,718 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:33,719 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:33,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1561891634, now seen corresponding path program 1 times [2019-11-06 21:26:33,720 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:33,720 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835218681] [2019-11-06 21:26:33,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:33,727 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:33,727 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824550167] [2019-11-06 21:26:33,728 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 21:26:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:33,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 21:26:33,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:33,869 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 21:26:33,870 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835218681] [2019-11-06 21:26:33,870 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:33,870 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824550167] [2019-11-06 21:26:33,871 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:26:33,871 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 21:26:33,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618582000] [2019-11-06 21:26:33,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:26:33,873 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:33,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:26:33,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:26:33,874 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2019-11-06 21:26:33,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:33,985 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-11-06 21:26:33,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:26:33,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-06 21:26:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:33,988 INFO L225 Difference]: With dead ends: 33 [2019-11-06 21:26:33,988 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 21:26:33,989 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:26:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 21:26:33,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-06 21:26:33,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 21:26:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-06 21:26:33,997 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2019-11-06 21:26:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:33,997 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-06 21:26:33,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:26:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-06 21:26:33,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 21:26:33,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:33,999 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:34,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:34,203 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:34,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:34,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1038075816, now seen corresponding path program 1 times [2019-11-06 21:26:34,205 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:34,206 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872340245] [2019-11-06 21:26:34,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:34,212 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:34,212 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200031037] [2019-11-06 21:26:34,212 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 21:26:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:34,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:26:34,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:34,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:34,501 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872340245] [2019-11-06 21:26:34,501 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:34,501 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200031037] [2019-11-06 21:26:34,502 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:34,503 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 21:26:34,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103448946] [2019-11-06 21:26:34,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:26:34,504 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:34,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:26:34,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:26:34,505 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2019-11-06 21:26:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:34,704 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-11-06 21:26:34,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:26:34,705 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-06 21:26:34,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:34,707 INFO L225 Difference]: With dead ends: 39 [2019-11-06 21:26:34,707 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 21:26:34,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:26:34,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 21:26:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2019-11-06 21:26:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 21:26:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-11-06 21:26:34,722 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2019-11-06 21:26:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:34,723 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-11-06 21:26:34,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:26:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-11-06 21:26:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 21:26:34,724 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:34,724 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:34,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:34,926 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:34,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1481884118, now seen corresponding path program 1 times [2019-11-06 21:26:34,927 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:34,928 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897682665] [2019-11-06 21:26:34,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:34,942 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:34,943 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722807587] [2019-11-06 21:26:34,943 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 21:26:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:34,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 21:26:34,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:35,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:35,130 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897682665] [2019-11-06 21:26:35,131 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:35,131 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722807587] [2019-11-06 21:26:35,131 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:35,131 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 21:26:35,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057937665] [2019-11-06 21:26:35,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:26:35,132 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:35,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:26:35,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:26:35,133 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2019-11-06 21:26:35,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:35,256 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2019-11-06 21:26:35,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:26:35,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-06 21:26:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:35,261 INFO L225 Difference]: With dead ends: 49 [2019-11-06 21:26:35,262 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 21:26:35,263 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:26:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 21:26:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-11-06 21:26:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 21:26:35,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-11-06 21:26:35,280 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 19 [2019-11-06 21:26:35,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:35,282 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-11-06 21:26:35,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:26:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-11-06 21:26:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 21:26:35,283 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:35,284 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:35,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:35,489 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:35,489 INFO L82 PathProgramCache]: Analyzing trace with hash 776909625, now seen corresponding path program 1 times [2019-11-06 21:26:35,490 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:35,490 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249619076] [2019-11-06 21:26:35,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:35,497 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:35,497 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961762950] [2019-11-06 21:26:35,497 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 [2019-11-06 21:26:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:35,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 21:26:35,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 21:26:35,632 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249619076] [2019-11-06 21:26:35,632 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:35,632 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961762950] [2019-11-06 21:26:35,633 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:35,633 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:26:35,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346649026] [2019-11-06 21:26:35,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:26:35,634 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:35,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:26:35,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:26:35,634 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 9 states. [2019-11-06 21:26:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:37,851 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-11-06 21:26:37,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:26:37,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2019-11-06 21:26:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:37,852 INFO L225 Difference]: With dead ends: 47 [2019-11-06 21:26:37,852 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 21:26:37,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:26:37,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 21:26:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2019-11-06 21:26:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 21:26:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-11-06 21:26:37,860 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2019-11-06 21:26:37,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:37,861 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-11-06 21:26:37,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:26:37,861 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-11-06 21:26:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:26:37,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:37,862 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:38,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:38,066 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:38,067 INFO L82 PathProgramCache]: Analyzing trace with hash -775079950, now seen corresponding path program 2 times [2019-11-06 21:26:38,067 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:38,067 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81228294] [2019-11-06 21:26:38,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:38,073 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:38,073 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199387578] [2019-11-06 21:26:38,074 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 [2019-11-06 21:26:38,105 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:26:38,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:38,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-06 21:26:38,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:38,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:26:38,474 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81228294] [2019-11-06 21:26:38,474 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:38,474 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199387578] [2019-11-06 21:26:38,475 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:38,475 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:26:38,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238220831] [2019-11-06 21:26:38,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:26:38,476 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:38,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:26:38,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:26:38,477 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2019-11-06 21:26:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:38,733 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2019-11-06 21:26:38,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:26:38,734 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-11-06 21:26:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:38,735 INFO L225 Difference]: With dead ends: 53 [2019-11-06 21:26:38,735 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 21:26:38,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:26:38,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 21:26:38,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2019-11-06 21:26:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 21:26:38,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-11-06 21:26:38,744 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 28 [2019-11-06 21:26:38,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:38,745 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-11-06 21:26:38,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:26:38,745 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-11-06 21:26:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:26:38,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:38,747 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:38,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:38,951 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:38,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:38,952 INFO L82 PathProgramCache]: Analyzing trace with hash 999927412, now seen corresponding path program 1 times [2019-11-06 21:26:38,953 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:38,953 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404562590] [2019-11-06 21:26:38,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:38,958 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:38,959 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230429907] [2019-11-06 21:26:38,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:26:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:38,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 21:26:38,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:39,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:39,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:39,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:39,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:39,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:26:39,369 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404562590] [2019-11-06 21:26:39,370 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:39,370 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230429907] [2019-11-06 21:26:39,370 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:39,370 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-06 21:26:39,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340618045] [2019-11-06 21:26:39,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:26:39,371 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:39,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:26:39,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:26:39,371 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 12 states. [2019-11-06 21:26:41,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:41,867 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2019-11-06 21:26:41,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 21:26:41,868 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-11-06 21:26:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:41,872 INFO L225 Difference]: With dead ends: 57 [2019-11-06 21:26:41,872 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 21:26:41,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:26:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 21:26:41,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2019-11-06 21:26:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 21:26:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2019-11-06 21:26:41,885 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 28 [2019-11-06 21:26:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:41,885 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2019-11-06 21:26:41,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:26:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2019-11-06 21:26:41,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:26:41,888 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:41,888 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:42,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:42,091 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:42,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:42,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1796148304, now seen corresponding path program 2 times [2019-11-06 21:26:42,092 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:42,092 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876753977] [2019-11-06 21:26:42,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:42,101 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:42,101 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940748891] [2019-11-06 21:26:42,102 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 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 21:26:42,128 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:26:42,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:42,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 21:26:42,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:42,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:26:42,384 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876753977] [2019-11-06 21:26:42,384 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:42,384 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940748891] [2019-11-06 21:26:42,385 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:42,385 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:26:42,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248438794] [2019-11-06 21:26:42,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:26:42,386 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:42,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:26:42,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:26:42,387 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 9 states. [2019-11-06 21:26:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:42,539 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2019-11-06 21:26:42,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:26:42,542 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2019-11-06 21:26:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:42,544 INFO L225 Difference]: With dead ends: 69 [2019-11-06 21:26:42,544 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 21:26:42,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:26:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 21:26:42,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2019-11-06 21:26:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 21:26:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-11-06 21:26:42,552 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 28 [2019-11-06 21:26:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:42,553 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-11-06 21:26:42,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:26:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-11-06 21:26:42,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 21:26:42,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:42,554 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:42,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:42,766 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:42,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:42,767 INFO L82 PathProgramCache]: Analyzing trace with hash 389577448, now seen corresponding path program 3 times [2019-11-06 21:26:42,767 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:42,768 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237617843] [2019-11-06 21:26:42,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:42,774 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:42,774 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044275357] [2019-11-06 21:26:42,774 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 [2019-11-06 21:26:42,806 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 21:26:42,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:42,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:26:42,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:42,919 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:42,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:42,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 21:26:43,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237617843] [2019-11-06 21:26:43,054 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:43,054 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044275357] [2019-11-06 21:26:43,054 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:43,054 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 21:26:43,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174603412] [2019-11-06 21:26:43,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:26:43,055 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:43,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:26:43,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:26:43,056 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2019-11-06 21:26:45,430 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2019-11-06 21:26:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:45,465 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2019-11-06 21:26:45,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 21:26:45,465 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-11-06 21:26:45,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:45,467 INFO L225 Difference]: With dead ends: 74 [2019-11-06 21:26:45,467 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 21:26:45,469 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:26:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 21:26:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-06 21:26:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 21:26:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-11-06 21:26:45,475 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2019-11-06 21:26:45,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:45,476 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-11-06 21:26:45,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:26:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-11-06 21:26:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 21:26:45,477 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:45,477 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:45,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:45,681 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:45,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:45,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1284065066, now seen corresponding path program 2 times [2019-11-06 21:26:45,681 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:45,682 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047994570] [2019-11-06 21:26:45,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:45,703 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:45,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41621236] [2019-11-06 21:26:45,703 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 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 [2019-11-06 21:26:45,732 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:26:45,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:45,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 21:26:45,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:46,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:26:46,096 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047994570] [2019-11-06 21:26:46,096 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:46,096 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41621236] [2019-11-06 21:26:46,097 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:46,097 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 21:26:46,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145785485] [2019-11-06 21:26:46,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:26:46,098 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:46,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:26:46,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:26:46,099 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 11 states. [2019-11-06 21:26:46,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:46,322 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-11-06 21:26:46,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:26:46,322 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-11-06 21:26:46,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:46,323 INFO L225 Difference]: With dead ends: 54 [2019-11-06 21:26:46,323 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 21:26:46,326 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:26:46,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 21:26:46,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-11-06 21:26:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 21:26:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-11-06 21:26:46,338 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 37 [2019-11-06 21:26:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:46,338 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-11-06 21:26:46,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:26:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-11-06 21:26:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 21:26:46,340 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:46,340 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:46,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:46,548 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:46,549 INFO L82 PathProgramCache]: Analyzing trace with hash 393904434, now seen corresponding path program 3 times [2019-11-06 21:26:46,549 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:46,549 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680881438] [2019-11-06 21:26:46,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:46,555 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:46,555 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317038761] [2019-11-06 21:26:46,555 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 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 [2019-11-06 21:26:46,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-06 21:26:46,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:46,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 21:26:46,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:46,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:46,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:47,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:47,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:49,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:49,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:52,158 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:52,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:54,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 37 refuted. 2 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 21:26:54,816 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680881438] [2019-11-06 21:26:54,816 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:54,817 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317038761] [2019-11-06 21:26:54,817 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:54,817 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-06 21:26:54,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822865954] [2019-11-06 21:26:54,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 21:26:54,818 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:54,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 21:26:54,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=142, Unknown=4, NotChecked=0, Total=182 [2019-11-06 21:26:54,819 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 14 states. [2019-11-06 21:27:11,144 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2019-11-06 21:27:14,202 WARN L191 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-11-06 21:27:19,056 WARN L191 SmtUtils]: Spent 4.42 s on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2019-11-06 21:27:21,541 WARN L191 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 49 DAG size of output: 46