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/egcd3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:26:59,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:26:59,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:26:59,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-05 12:26:59,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:26:59,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:26:59,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:26:59,494 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 [2019-09-05 12:26:59,516 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:26:59,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:26:59,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 12:26:59,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 12:26:59,518 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 12:26:59,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:26:59,519 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:26:59,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 12:26:59,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:26:59,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:26:59,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:26:59,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:26:59,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:26:59,521 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:26:59,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:26:59,522 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 12:26:59,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:26:59,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:26:59,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:26:59,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 12:26:59,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 12:26:59,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:26:59,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:26:59,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:26:59,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 12:26:59,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 12:26:59,524 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:26:59,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:26:59,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 12:26:59,569 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:26:59,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:26:59,591 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:26:59,592 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:26:59,592 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:26:59,593 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3.c [2019-09-05 12:26:59,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0840b656/3eb9c5f2474941beb3924f2252782423/FLAG7d5b7722e [2019-09-05 12:27:00,071 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:27:00,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3.c [2019-09-05 12:27:00,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0840b656/3eb9c5f2474941beb3924f2252782423/FLAG7d5b7722e [2019-09-05 12:27:00,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0840b656/3eb9c5f2474941beb3924f2252782423 [2019-09-05 12:27:00,468 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:27:00,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:27:00,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:27:00,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:27:00,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:27:00,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:27:00" (1/1) ... [2019-09-05 12:27:00,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0885a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:27:00, skipping insertion in model container [2019-09-05 12:27:00,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:27:00" (1/1) ... [2019-09-05 12:27:00,485 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:27:00,504 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:27:00,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:27:00,715 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:27:00,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:27:00,746 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:27:00,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:27:00 WrapperNode [2019-09-05 12:27:00,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:27:00,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:27:00,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:27:00,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:27:00,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:27:00" (1/1) ... [2019-09-05 12:27:00,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:27:00" (1/1) ... [2019-09-05 12:27:00,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:27:00" (1/1) ... [2019-09-05 12:27:00,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:27:00" (1/1) ... [2019-09-05 12:27:00,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:27:00" (1/1) ... [2019-09-05 12:27:00,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:27:00" (1/1) ... [2019-09-05 12:27:00,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:27:00" (1/1) ... [2019-09-05 12:27:00,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:27:00,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:27:00,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:27:00,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:27:00,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:27:00" (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 [2019-09-05 12:27:00,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:27:00,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:27:00,932 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:27:00,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:27:00,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:27:00,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 12:27:00,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 12:27:00,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:27:00,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:27:00,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:27:00,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:27:01,168 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:27:01,168 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-05 12:27:01,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:27:01 BoogieIcfgContainer [2019-09-05 12:27:01,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:27:01,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:27:01,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:27:01,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:27:01,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:27:00" (1/3) ... [2019-09-05 12:27:01,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715999e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:27:01, skipping insertion in model container [2019-09-05 12:27:01,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:27:00" (2/3) ... [2019-09-05 12:27:01,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715999e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:27:01, skipping insertion in model container [2019-09-05 12:27:01,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:27:01" (3/3) ... [2019-09-05 12:27:01,189 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd3.c [2019-09-05 12:27:01,209 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:27:01,215 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:27:01,237 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:27:01,275 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 12:27:01,276 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:27:01,276 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 12:27:01,276 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:27:01,277 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:27:01,277 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:27:01,277 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:27:01,277 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:27:01,277 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:27:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-05 12:27:01,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:27:01,300 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:01,301 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:01,303 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:01,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2133473032, now seen corresponding path program 1 times [2019-09-05 12:27:01,310 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:01,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:01,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:01,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:01,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:01,413 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:27:01,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:27:01,416 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:27:01,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:27:01,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:27:01,429 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-05 12:27:01,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:01,455 INFO L93 Difference]: Finished difference Result 53 states and 84 transitions. [2019-09-05 12:27:01,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:27:01,457 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-05 12:27:01,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:01,467 INFO L225 Difference]: With dead ends: 53 [2019-09-05 12:27:01,467 INFO L226 Difference]: Without dead ends: 24 [2019-09-05 12:27:01,471 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:27:01,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-05 12:27:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-05 12:27:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-05 12:27:01,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-09-05 12:27:01,538 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 10 [2019-09-05 12:27:01,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:01,539 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-09-05 12:27:01,539 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:27:01,539 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-09-05 12:27:01,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-05 12:27:01,540 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:01,540 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:01,541 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:01,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:01,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1704601660, now seen corresponding path program 1 times [2019-09-05 12:27:01,541 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:01,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:01,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:01,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:01,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:01,552 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:01,553 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:01,553 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:27:01,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:01,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-05 12:27:01,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:01,644 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:27:01,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-05 12:27:01,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-05 12:27:01,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-05 12:27:01,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 12:27:01,647 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 3 states. [2019-09-05 12:27:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:01,702 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2019-09-05 12:27:01,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-05 12:27:01,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-09-05 12:27:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:01,705 INFO L225 Difference]: With dead ends: 43 [2019-09-05 12:27:01,705 INFO L226 Difference]: Without dead ends: 36 [2019-09-05 12:27:01,707 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 12:27:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-05 12:27:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2019-09-05 12:27:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-05 12:27:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-09-05 12:27:01,730 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 11 [2019-09-05 12:27:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:01,731 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-09-05 12:27:01,731 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-05 12:27:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-09-05 12:27:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-05 12:27:01,732 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:01,732 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:01,734 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:01,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1987085660, now seen corresponding path program 1 times [2019-09-05 12:27:01,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:01,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:01,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:01,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:01,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:01,767 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:01,768 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:01,768 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:27:01,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:01,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-05 12:27:01,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:01,887 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:27:01,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:27:01,888 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:27:01,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:27:01,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:27:01,889 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2019-09-05 12:27:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:01,987 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2019-09-05 12:27:01,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:27:01,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-05 12:27:01,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:01,991 INFO L225 Difference]: With dead ends: 42 [2019-09-05 12:27:01,991 INFO L226 Difference]: Without dead ends: 40 [2019-09-05 12:27:01,992 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:27:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-05 12:27:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-05 12:27:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-05 12:27:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2019-09-05 12:27:02,008 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 14 [2019-09-05 12:27:02,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:02,009 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2019-09-05 12:27:02,009 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:27:02,009 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2019-09-05 12:27:02,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-05 12:27:02,011 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:02,012 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:02,012 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:02,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1574644974, now seen corresponding path program 1 times [2019-09-05 12:27:02,012 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:02,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:02,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:02,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:02,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:02,038 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:02,039 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:02,039 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:27:02,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:02,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-05 12:27:02,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:02,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:02,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-09-05 12:27:02,141 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:27:02,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:27:02,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:27:02,142 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 5 states. [2019-09-05 12:27:02,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:02,298 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2019-09-05 12:27:02,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:27:02,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-09-05 12:27:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:02,301 INFO L225 Difference]: With dead ends: 85 [2019-09-05 12:27:02,301 INFO L226 Difference]: Without dead ends: 78 [2019-09-05 12:27:02,302 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:27:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-05 12:27:02,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2019-09-05 12:27:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-05 12:27:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2019-09-05 12:27:02,318 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 16 [2019-09-05 12:27:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:02,319 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2019-09-05 12:27:02,319 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:27:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2019-09-05 12:27:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 12:27:02,320 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:02,320 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:02,320 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:02,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1955242494, now seen corresponding path program 1 times [2019-09-05 12:27:02,321 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:02,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:02,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:02,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:02,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:02,331 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:02,331 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:02,332 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:27:02,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:02,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-05 12:27:02,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:02,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:27:02,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:27:02,403 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:27:02,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:27:02,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:27:02,404 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand 5 states. [2019-09-05 12:27:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:02,491 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2019-09-05 12:27:02,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:27:02,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-09-05 12:27:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:02,493 INFO L225 Difference]: With dead ends: 68 [2019-09-05 12:27:02,493 INFO L226 Difference]: Without dead ends: 66 [2019-09-05 12:27:02,493 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:27:02,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-05 12:27:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-09-05 12:27:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-05 12:27:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2019-09-05 12:27:02,505 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 19 [2019-09-05 12:27:02,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:02,506 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2019-09-05 12:27:02,506 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:27:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2019-09-05 12:27:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 12:27:02,507 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:02,507 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:02,507 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:02,508 INFO L82 PathProgramCache]: Analyzing trace with hash -697444338, now seen corresponding path program 1 times [2019-09-05 12:27:02,508 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:02,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:02,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:02,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:02,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:02,515 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:02,515 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:02,515 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:27:02,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:02,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-05 12:27:02,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:02,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:02,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-05 12:27:02,594 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 12:27:02,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 12:27:02,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:27:02,595 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 6 states. [2019-09-05 12:27:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:02,707 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2019-09-05 12:27:02,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:27:02,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-09-05 12:27:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:02,709 INFO L225 Difference]: With dead ends: 102 [2019-09-05 12:27:02,709 INFO L226 Difference]: Without dead ends: 100 [2019-09-05 12:27:02,710 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:27:02,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-05 12:27:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2019-09-05 12:27:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-05 12:27:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2019-09-05 12:27:02,733 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 19 [2019-09-05 12:27:02,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:02,734 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2019-09-05 12:27:02,734 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 12:27:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2019-09-05 12:27:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-05 12:27:02,736 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:02,736 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:02,737 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1428232868, now seen corresponding path program 1 times [2019-09-05 12:27:02,737 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:02,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:02,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:02,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:02,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:02,760 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:02,760 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:02,760 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:27:02,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:02,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-05 12:27:02,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-05 12:27:02,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:27:02,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:27:02,827 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:27:02,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:27:02,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:27:02,828 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand 5 states. [2019-09-05 12:27:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:02,901 INFO L93 Difference]: Finished difference Result 140 states and 199 transitions. [2019-09-05 12:27:02,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:27:02,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-09-05 12:27:02,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:02,905 INFO L225 Difference]: With dead ends: 140 [2019-09-05 12:27:02,905 INFO L226 Difference]: Without dead ends: 138 [2019-09-05 12:27:02,906 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:27:02,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-09-05 12:27:02,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2019-09-05 12:27:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-05 12:27:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 191 transitions. [2019-09-05 12:27:02,948 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 191 transitions. Word has length 24 [2019-09-05 12:27:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:02,949 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 191 transitions. [2019-09-05 12:27:02,949 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:27:02,949 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 191 transitions. [2019-09-05 12:27:02,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-05 12:27:02,952 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:02,952 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:02,952 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash -369092908, now seen corresponding path program 1 times [2019-09-05 12:27:02,953 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:02,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:02,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:02,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:02,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:02,961 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:02,961 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:02,961 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:27:02,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:02,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-05 12:27:02,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:03,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:03,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-05 12:27:03,086 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 12:27:03,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 12:27:03,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:27:03,086 INFO L87 Difference]: Start difference. First operand 132 states and 191 transitions. Second operand 7 states. [2019-09-05 12:27:03,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:03,261 INFO L93 Difference]: Finished difference Result 145 states and 202 transitions. [2019-09-05 12:27:03,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:27:03,262 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-09-05 12:27:03,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:03,264 INFO L225 Difference]: With dead ends: 145 [2019-09-05 12:27:03,264 INFO L226 Difference]: Without dead ends: 143 [2019-09-05 12:27:03,264 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:27:03,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-09-05 12:27:03,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2019-09-05 12:27:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-09-05 12:27:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 197 transitions. [2019-09-05 12:27:03,284 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 197 transitions. Word has length 24 [2019-09-05 12:27:03,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:03,284 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 197 transitions. [2019-09-05 12:27:03,284 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 12:27:03,284 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 197 transitions. [2019-09-05 12:27:03,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-05 12:27:03,285 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:03,286 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:03,286 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:03,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:03,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1273187556, now seen corresponding path program 2 times [2019-09-05 12:27:03,286 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:03,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:03,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:03,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:03,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:03,292 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:03,293 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:03,293 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:27:03,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:03,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:27:03,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:03,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-05 12:27:03,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:03,375 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:27:03,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:27:03,376 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:27:03,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:27:03,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:27:03,377 INFO L87 Difference]: Start difference. First operand 140 states and 197 transitions. Second operand 5 states. [2019-09-05 12:27:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:03,495 INFO L93 Difference]: Finished difference Result 179 states and 249 transitions. [2019-09-05 12:27:03,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:27:03,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-09-05 12:27:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:03,498 INFO L225 Difference]: With dead ends: 179 [2019-09-05 12:27:03,498 INFO L226 Difference]: Without dead ends: 123 [2019-09-05 12:27:03,499 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:27:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-09-05 12:27:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 115. [2019-09-05 12:27:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-09-05 12:27:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2019-09-05 12:27:03,513 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 24 [2019-09-05 12:27:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:03,514 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2019-09-05 12:27:03,514 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:27:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2019-09-05 12:27:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-05 12:27:03,515 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:03,515 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:03,515 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:03,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:03,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1127690622, now seen corresponding path program 1 times [2019-09-05 12:27:03,516 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:03,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:03,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:03,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:03,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:03,524 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:03,524 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:03,524 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:27:03,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:03,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-05 12:27:03,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-05 12:27:03,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:27:03,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:27:03,579 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:27:03,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:27:03,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:27:03,580 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand 5 states. [2019-09-05 12:27:03,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:03,655 INFO L93 Difference]: Finished difference Result 183 states and 266 transitions. [2019-09-05 12:27:03,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:27:03,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-09-05 12:27:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:03,660 INFO L225 Difference]: With dead ends: 183 [2019-09-05 12:27:03,660 INFO L226 Difference]: Without dead ends: 181 [2019-09-05 12:27:03,661 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:27:03,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-09-05 12:27:03,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 159. [2019-09-05 12:27:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-09-05 12:27:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 230 transitions. [2019-09-05 12:27:03,698 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 230 transitions. Word has length 29 [2019-09-05 12:27:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:03,698 INFO L475 AbstractCegarLoop]: Abstraction has 159 states and 230 transitions. [2019-09-05 12:27:03,698 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:27:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 230 transitions. [2019-09-05 12:27:03,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-05 12:27:03,707 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:03,707 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:03,707 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:03,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1508679066, now seen corresponding path program 1 times [2019-09-05 12:27:03,708 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:03,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:03,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:03,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:03,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:03,731 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:03,732 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:03,732 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:27:03,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:03,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-05 12:27:03,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:27:03,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:03,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:27:03,969 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:27:03,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:27:03,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:27:03,970 INFO L87 Difference]: Start difference. First operand 159 states and 230 transitions. Second operand 10 states. [2019-09-05 12:27:04,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:04,451 INFO L93 Difference]: Finished difference Result 222 states and 321 transitions. [2019-09-05 12:27:04,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:27:04,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-09-05 12:27:04,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:04,457 INFO L225 Difference]: With dead ends: 222 [2019-09-05 12:27:04,458 INFO L226 Difference]: Without dead ends: 219 [2019-09-05 12:27:04,459 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:27:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-09-05 12:27:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2019-09-05 12:27:04,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-09-05 12:27:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 314 transitions. [2019-09-05 12:27:04,492 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 314 transitions. Word has length 41 [2019-09-05 12:27:04,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:04,493 INFO L475 AbstractCegarLoop]: Abstraction has 216 states and 314 transitions. [2019-09-05 12:27:04,493 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:27:04,493 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 314 transitions. [2019-09-05 12:27:04,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-05 12:27:04,495 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:04,495 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:04,495 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:04,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:04,495 INFO L82 PathProgramCache]: Analyzing trace with hash -458231108, now seen corresponding path program 2 times [2019-09-05 12:27:04,496 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:04,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:04,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:04,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:04,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:04,502 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:04,502 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:04,502 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:04,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:04,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:27:04,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:04,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-05 12:27:04,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-05 12:27:04,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:04,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:27:04,617 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:27:04,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:27:04,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:27:04,618 INFO L87 Difference]: Start difference. First operand 216 states and 314 transitions. Second operand 8 states. [2019-09-05 12:27:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:05,038 INFO L93 Difference]: Finished difference Result 327 states and 490 transitions. [2019-09-05 12:27:05,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:27:05,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2019-09-05 12:27:05,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:05,042 INFO L225 Difference]: With dead ends: 327 [2019-09-05 12:27:05,042 INFO L226 Difference]: Without dead ends: 320 [2019-09-05 12:27:05,043 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:27:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-09-05 12:27:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 235. [2019-09-05 12:27:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2019-09-05 12:27:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 341 transitions. [2019-09-05 12:27:05,076 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 341 transitions. Word has length 46 [2019-09-05 12:27:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:05,076 INFO L475 AbstractCegarLoop]: Abstraction has 235 states and 341 transitions. [2019-09-05 12:27:05,076 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:27:05,076 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 341 transitions. [2019-09-05 12:27:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-05 12:27:05,078 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:05,078 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:05,078 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:05,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:05,078 INFO L82 PathProgramCache]: Analyzing trace with hash -659177953, now seen corresponding path program 1 times [2019-09-05 12:27:05,079 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:05,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:05,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:05,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:05,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:05,086 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:05,086 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:05,087 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:05,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:05,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 12:27:05,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-09-05 12:27:05,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:05,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-05 12:27:05,211 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 12:27:05,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 12:27:05,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:27:05,212 INFO L87 Difference]: Start difference. First operand 235 states and 341 transitions. Second operand 6 states. [2019-09-05 12:27:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:05,434 INFO L93 Difference]: Finished difference Result 347 states and 523 transitions. [2019-09-05 12:27:05,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:27:05,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2019-09-05 12:27:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:05,441 INFO L225 Difference]: With dead ends: 347 [2019-09-05 12:27:05,441 INFO L226 Difference]: Without dead ends: 345 [2019-09-05 12:27:05,442 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:27:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2019-09-05 12:27:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 300. [2019-09-05 12:27:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2019-09-05 12:27:05,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 455 transitions. [2019-09-05 12:27:05,483 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 455 transitions. Word has length 51 [2019-09-05 12:27:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:05,485 INFO L475 AbstractCegarLoop]: Abstraction has 300 states and 455 transitions. [2019-09-05 12:27:05,485 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 12:27:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 455 transitions. [2019-09-05 12:27:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-05 12:27:05,487 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:05,487 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:05,487 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:05,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:05,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1838702556, now seen corresponding path program 1 times [2019-09-05 12:27:05,488 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:05,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:05,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:05,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:05,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:05,501 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:05,501 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:05,502 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:05,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:05,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-05 12:27:05,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-05 12:27:05,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:05,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:27:05,667 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:27:05,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:27:05,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:27:05,668 INFO L87 Difference]: Start difference. First operand 300 states and 455 transitions. Second operand 8 states. [2019-09-05 12:27:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:05,876 INFO L93 Difference]: Finished difference Result 358 states and 543 transitions. [2019-09-05 12:27:05,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 12:27:05,877 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2019-09-05 12:27:05,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:05,881 INFO L225 Difference]: With dead ends: 358 [2019-09-05 12:27:05,881 INFO L226 Difference]: Without dead ends: 356 [2019-09-05 12:27:05,882 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:27:05,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2019-09-05 12:27:05,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2019-09-05 12:27:05,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2019-09-05 12:27:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 537 transitions. [2019-09-05 12:27:05,924 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 537 transitions. Word has length 49 [2019-09-05 12:27:05,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:05,924 INFO L475 AbstractCegarLoop]: Abstraction has 352 states and 537 transitions. [2019-09-05 12:27:05,924 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:27:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 537 transitions. [2019-09-05 12:27:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-05 12:27:05,925 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:05,925 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:05,926 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:05,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1685131186, now seen corresponding path program 2 times [2019-09-05 12:27:05,926 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:05,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:05,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:05,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:05,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:05,933 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:05,933 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:05,933 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:05,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:27:05,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:27:05,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:05,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-05 12:27:05,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-05 12:27:06,011 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:27:06,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:27:06,012 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:27:06,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:27:06,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:27:06,013 INFO L87 Difference]: Start difference. First operand 352 states and 537 transitions. Second operand 5 states. [2019-09-05 12:27:06,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:06,122 INFO L93 Difference]: Finished difference Result 618 states and 936 transitions. [2019-09-05 12:27:06,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:27:06,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2019-09-05 12:27:06,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:06,126 INFO L225 Difference]: With dead ends: 618 [2019-09-05 12:27:06,127 INFO L226 Difference]: Without dead ends: 356 [2019-09-05 12:27:06,130 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:27:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2019-09-05 12:27:06,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 335. [2019-09-05 12:27:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2019-09-05 12:27:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 500 transitions. [2019-09-05 12:27:06,184 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 500 transitions. Word has length 54 [2019-09-05 12:27:06,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:06,184 INFO L475 AbstractCegarLoop]: Abstraction has 335 states and 500 transitions. [2019-09-05 12:27:06,184 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:27:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 500 transitions. [2019-09-05 12:27:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-05 12:27:06,185 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:06,186 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:06,186 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:06,186 INFO L82 PathProgramCache]: Analyzing trace with hash 812510334, now seen corresponding path program 3 times [2019-09-05 12:27:06,187 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:06,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:06,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:06,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:06,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:06,192 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:06,193 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:06,193 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:06,224 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:27:06,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-05 12:27:06,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:06,277 WARN L254 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 64 conjunts are in the unsatisfiable core [2019-09-05 12:27:06,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:06,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:27:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-05 12:27:06,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:06,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-05 12:27:06,537 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-05 12:27:06,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-05 12:27:06,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:27:06,538 INFO L87 Difference]: Start difference. First operand 335 states and 500 transitions. Second operand 14 states. [2019-09-05 12:27:07,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:07,164 INFO L93 Difference]: Finished difference Result 406 states and 595 transitions. [2019-09-05 12:27:07,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 12:27:07,165 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-09-05 12:27:07,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:07,170 INFO L225 Difference]: With dead ends: 406 [2019-09-05 12:27:07,170 INFO L226 Difference]: Without dead ends: 404 [2019-09-05 12:27:07,171 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:27:07,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2019-09-05 12:27:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 394. [2019-09-05 12:27:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2019-09-05 12:27:07,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 583 transitions. [2019-09-05 12:27:07,223 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 583 transitions. Word has length 54 [2019-09-05 12:27:07,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:07,223 INFO L475 AbstractCegarLoop]: Abstraction has 394 states and 583 transitions. [2019-09-05 12:27:07,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-05 12:27:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 583 transitions. [2019-09-05 12:27:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-05 12:27:07,226 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:07,226 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:07,226 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:07,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:07,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1769536121, now seen corresponding path program 1 times [2019-09-05 12:27:07,227 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:07,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:07,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:07,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:07,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:07,235 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:07,235 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:07,235 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:07,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:07,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-05 12:27:07,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-09-05 12:27:07,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:07,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-05 12:27:07,515 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-05 12:27:07,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-05 12:27:07,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:27:07,516 INFO L87 Difference]: Start difference. First operand 394 states and 583 transitions. Second operand 11 states. [2019-09-05 12:27:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:08,049 INFO L93 Difference]: Finished difference Result 483 states and 715 transitions. [2019-09-05 12:27:08,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 12:27:08,050 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 63 [2019-09-05 12:27:08,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:08,054 INFO L225 Difference]: With dead ends: 483 [2019-09-05 12:27:08,054 INFO L226 Difference]: Without dead ends: 480 [2019-09-05 12:27:08,055 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-09-05 12:27:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2019-09-05 12:27:08,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 469. [2019-09-05 12:27:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-09-05 12:27:08,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 700 transitions. [2019-09-05 12:27:08,120 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 700 transitions. Word has length 63 [2019-09-05 12:27:08,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:08,120 INFO L475 AbstractCegarLoop]: Abstraction has 469 states and 700 transitions. [2019-09-05 12:27:08,120 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-05 12:27:08,120 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 700 transitions. [2019-09-05 12:27:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-05 12:27:08,122 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:08,122 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:08,122 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:08,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:08,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1962864291, now seen corresponding path program 2 times [2019-09-05 12:27:08,123 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:08,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:08,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:08,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:08,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:08,129 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:08,129 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:08,129 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:08,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:27:08,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:27:08,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:08,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 70 conjunts are in the unsatisfiable core [2019-09-05 12:27:08,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-09-05 12:27:08,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:08,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-05 12:27:08,687 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 12:27:08,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 12:27:08,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:27:08,687 INFO L87 Difference]: Start difference. First operand 469 states and 700 transitions. Second operand 16 states. [2019-09-05 12:27:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:09,598 INFO L93 Difference]: Finished difference Result 563 states and 836 transitions. [2019-09-05 12:27:09,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 12:27:09,598 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2019-09-05 12:27:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:09,605 INFO L225 Difference]: With dead ends: 563 [2019-09-05 12:27:09,605 INFO L226 Difference]: Without dead ends: 560 [2019-09-05 12:27:09,606 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:27:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2019-09-05 12:27:09,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 481. [2019-09-05 12:27:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2019-09-05 12:27:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 712 transitions. [2019-09-05 12:27:09,685 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 712 transitions. Word has length 68 [2019-09-05 12:27:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:09,686 INFO L475 AbstractCegarLoop]: Abstraction has 481 states and 712 transitions. [2019-09-05 12:27:09,686 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 12:27:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 712 transitions. [2019-09-05 12:27:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-05 12:27:09,689 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:09,689 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:09,690 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:09,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:09,690 INFO L82 PathProgramCache]: Analyzing trace with hash -457921536, now seen corresponding path program 2 times [2019-09-05 12:27:09,690 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:09,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:09,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:09,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:09,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:09,716 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:09,717 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:09,717 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:09,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:27:09,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:27:09,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:09,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-05 12:27:09,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-09-05 12:27:09,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:09,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-05 12:27:09,835 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 12:27:09,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 12:27:09,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:27:09,836 INFO L87 Difference]: Start difference. First operand 481 states and 712 transitions. Second operand 7 states. [2019-09-05 12:27:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:10,044 INFO L93 Difference]: Finished difference Result 662 states and 1008 transitions. [2019-09-05 12:27:10,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:27:10,045 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2019-09-05 12:27:10,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:10,051 INFO L225 Difference]: With dead ends: 662 [2019-09-05 12:27:10,052 INFO L226 Difference]: Without dead ends: 660 [2019-09-05 12:27:10,052 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:27:10,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2019-09-05 12:27:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 585. [2019-09-05 12:27:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2019-09-05 12:27:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 898 transitions. [2019-09-05 12:27:10,121 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 898 transitions. Word has length 73 [2019-09-05 12:27:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:10,122 INFO L475 AbstractCegarLoop]: Abstraction has 585 states and 898 transitions. [2019-09-05 12:27:10,122 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 12:27:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 898 transitions. [2019-09-05 12:27:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-05 12:27:10,123 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:10,124 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:10,124 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:10,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:10,124 INFO L82 PathProgramCache]: Analyzing trace with hash 288574288, now seen corresponding path program 4 times [2019-09-05 12:27:10,124 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:10,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:10,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:10,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:10,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:10,131 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:10,131 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:10,131 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:10,148 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:27:10,172 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:27:10,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:10,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjunts are in the unsatisfiable core [2019-09-05 12:27:10,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 47 proven. 32 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-09-05 12:27:10,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:10,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:27:10,249 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:27:10,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:27:10,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:27:10,250 INFO L87 Difference]: Start difference. First operand 585 states and 898 transitions. Second operand 10 states. [2019-09-05 12:27:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:10,520 INFO L93 Difference]: Finished difference Result 611 states and 919 transitions. [2019-09-05 12:27:10,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:27:10,520 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2019-09-05 12:27:10,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:10,525 INFO L225 Difference]: With dead ends: 611 [2019-09-05 12:27:10,525 INFO L226 Difference]: Without dead ends: 609 [2019-09-05 12:27:10,526 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:27:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2019-09-05 12:27:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 605. [2019-09-05 12:27:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-09-05 12:27:10,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 913 transitions. [2019-09-05 12:27:10,610 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 913 transitions. Word has length 74 [2019-09-05 12:27:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:10,611 INFO L475 AbstractCegarLoop]: Abstraction has 605 states and 913 transitions. [2019-09-05 12:27:10,611 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:27:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 913 transitions. [2019-09-05 12:27:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-05 12:27:10,613 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:10,613 INFO L399 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:10,613 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:10,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:10,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1528046097, now seen corresponding path program 1 times [2019-09-05 12:27:10,614 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:10,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:10,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:10,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:10,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:10,619 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:10,619 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:10,619 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:10,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:10,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 12:27:10,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-09-05 12:27:10,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:10,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:27:10,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:27:10,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:27:10,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:27:10,758 INFO L87 Difference]: Start difference. First operand 605 states and 913 transitions. Second operand 8 states. [2019-09-05 12:27:11,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:11,115 INFO L93 Difference]: Finished difference Result 823 states and 1266 transitions. [2019-09-05 12:27:11,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 12:27:11,116 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2019-09-05 12:27:11,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:11,122 INFO L225 Difference]: With dead ends: 823 [2019-09-05 12:27:11,122 INFO L226 Difference]: Without dead ends: 821 [2019-09-05 12:27:11,123 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:27:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2019-09-05 12:27:11,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 708. [2019-09-05 12:27:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2019-09-05 12:27:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1095 transitions. [2019-09-05 12:27:11,223 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1095 transitions. Word has length 76 [2019-09-05 12:27:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:11,224 INFO L475 AbstractCegarLoop]: Abstraction has 708 states and 1095 transitions. [2019-09-05 12:27:11,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:27:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1095 transitions. [2019-09-05 12:27:11,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-05 12:27:11,227 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:11,227 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:11,227 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:11,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:11,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1347050706, now seen corresponding path program 5 times [2019-09-05 12:27:11,228 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:11,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:11,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:11,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:11,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:11,248 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:11,248 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:11,248 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:11,261 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:11,324 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-05 12:27:11,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:11,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-05 12:27:11,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-05 12:27:11,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:11,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-05 12:27:11,578 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:27:11,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:27:11,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:27:11,578 INFO L87 Difference]: Start difference. First operand 708 states and 1095 transitions. Second operand 13 states. [2019-09-05 12:27:12,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:12,471 INFO L93 Difference]: Finished difference Result 916 states and 1414 transitions. [2019-09-05 12:27:12,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 12:27:12,472 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2019-09-05 12:27:12,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:12,481 INFO L225 Difference]: With dead ends: 916 [2019-09-05 12:27:12,482 INFO L226 Difference]: Without dead ends: 914 [2019-09-05 12:27:12,483 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:27:12,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2019-09-05 12:27:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 899. [2019-09-05 12:27:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2019-09-05 12:27:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1397 transitions. [2019-09-05 12:27:12,660 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1397 transitions. Word has length 79 [2019-09-05 12:27:12,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:12,660 INFO L475 AbstractCegarLoop]: Abstraction has 899 states and 1397 transitions. [2019-09-05 12:27:12,661 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:27:12,661 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1397 transitions. [2019-09-05 12:27:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-05 12:27:12,664 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:12,664 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:12,664 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:12,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2085410328, now seen corresponding path program 3 times [2019-09-05 12:27:12,665 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:12,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:12,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:12,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:12,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:12,682 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:12,682 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:12,683 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:12,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:12,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-05 12:27:12,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:12,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 54 conjunts are in the unsatisfiable core [2019-09-05 12:27:12,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:13,051 WARN L838 $PredicateComparison]: unable to prove that (and (= c_main_~a~0 c_main_~y~0) (exists ((main_~k~0 Int)) (and (= c_main_~s~0 (+ (- (* main_~k~0 c_main_~r~0)) 0)) (= (+ (- (* c_main_~p~0 main_~k~0)) 1) c_main_~q~0) (= (mod main_~k~0 (- 2)) 0) (= c_main_~x~0 (* c_main_~a~0 main_~k~0)))) (= c_main_~r~0 1) (<= 1 c_main_~x~0) (= c_main_~p~0 0)) is different from false [2019-09-05 12:27:13,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:27:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 68 proven. 5 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2019-09-05 12:27:13,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:13,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-05 12:27:13,159 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:27:13,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:27:13,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=105, Unknown=1, NotChecked=20, Total=156 [2019-09-05 12:27:13,160 INFO L87 Difference]: Start difference. First operand 899 states and 1397 transitions. Second operand 13 states. [2019-09-05 12:27:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:14,213 INFO L93 Difference]: Finished difference Result 948 states and 1465 transitions. [2019-09-05 12:27:14,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 12:27:14,213 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2019-09-05 12:27:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:14,221 INFO L225 Difference]: With dead ends: 948 [2019-09-05 12:27:14,221 INFO L226 Difference]: Without dead ends: 945 [2019-09-05 12:27:14,222 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=240, Unknown=1, NotChecked=32, Total=342 [2019-09-05 12:27:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2019-09-05 12:27:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 936. [2019-09-05 12:27:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 936 states. [2019-09-05 12:27:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1452 transitions. [2019-09-05 12:27:14,384 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1452 transitions. Word has length 85 [2019-09-05 12:27:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:14,385 INFO L475 AbstractCegarLoop]: Abstraction has 936 states and 1452 transitions. [2019-09-05 12:27:14,385 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:27:14,385 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1452 transitions. [2019-09-05 12:27:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-05 12:27:14,387 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:14,388 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:14,388 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:14,388 INFO L82 PathProgramCache]: Analyzing trace with hash -884081496, now seen corresponding path program 6 times [2019-09-05 12:27:14,388 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:14,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:14,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:14,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:14,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:14,401 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:14,402 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:14,402 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:14,423 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:14,517 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-05 12:27:14,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:14,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-05 12:27:14,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:14,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:27:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 72 proven. 42 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-09-05 12:27:14,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:14,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-05 12:27:14,702 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:27:14,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:27:14,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:27:14,702 INFO L87 Difference]: Start difference. First operand 936 states and 1452 transitions. Second operand 13 states. [2019-09-05 12:27:15,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:15,331 INFO L93 Difference]: Finished difference Result 955 states and 1472 transitions. [2019-09-05 12:27:15,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 12:27:15,332 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2019-09-05 12:27:15,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:15,341 INFO L225 Difference]: With dead ends: 955 [2019-09-05 12:27:15,341 INFO L226 Difference]: Without dead ends: 953 [2019-09-05 12:27:15,342 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:27:15,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2019-09-05 12:27:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 945. [2019-09-05 12:27:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2019-09-05 12:27:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1462 transitions. [2019-09-05 12:27:15,521 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1462 transitions. Word has length 84 [2019-09-05 12:27:15,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:15,521 INFO L475 AbstractCegarLoop]: Abstraction has 945 states and 1462 transitions. [2019-09-05 12:27:15,521 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:27:15,521 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1462 transitions. [2019-09-05 12:27:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-05 12:27:15,523 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:15,523 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:15,523 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:15,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1317039505, now seen corresponding path program 4 times [2019-09-05 12:27:15,524 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:15,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:15,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:15,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:15,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:15,539 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:15,539 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:15,540 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:15,553 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:15,578 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:27:15,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:15,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 56 conjunts are in the unsatisfiable core [2019-09-05 12:27:15,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:15,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:27:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 24 proven. 87 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-09-05 12:27:15,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:15,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-05 12:27:15,923 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 12:27:15,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 12:27:15,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:27:15,924 INFO L87 Difference]: Start difference. First operand 945 states and 1462 transitions. Second operand 16 states. [2019-09-05 12:27:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:16,962 INFO L93 Difference]: Finished difference Result 1023 states and 1543 transitions. [2019-09-05 12:27:16,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:27:16,962 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2019-09-05 12:27:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:16,969 INFO L225 Difference]: With dead ends: 1023 [2019-09-05 12:27:16,969 INFO L226 Difference]: Without dead ends: 1020 [2019-09-05 12:27:16,970 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:27:16,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2019-09-05 12:27:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 914. [2019-09-05 12:27:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 914 states. [2019-09-05 12:27:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1372 transitions. [2019-09-05 12:27:17,171 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1372 transitions. Word has length 88 [2019-09-05 12:27:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:17,172 INFO L475 AbstractCegarLoop]: Abstraction has 914 states and 1372 transitions. [2019-09-05 12:27:17,172 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 12:27:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1372 transitions. [2019-09-05 12:27:17,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-05 12:27:17,174 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:17,174 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:17,174 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:17,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1481043650, now seen corresponding path program 5 times [2019-09-05 12:27:17,175 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:17,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:17,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:17,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:17,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:17,181 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:17,181 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:17,182 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:17,197 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:17,264 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-09-05 12:27:17,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:17,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 79 conjunts are in the unsatisfiable core [2019-09-05 12:27:17,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 22 proven. 93 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-09-05 12:27:17,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:17,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-05 12:27:17,682 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-05 12:27:17,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-05 12:27:17,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2019-09-05 12:27:17,683 INFO L87 Difference]: Start difference. First operand 914 states and 1372 transitions. Second operand 17 states. [2019-09-05 12:27:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:18,952 INFO L93 Difference]: Finished difference Result 1068 states and 1601 transitions. [2019-09-05 12:27:18,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:27:18,952 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 90 [2019-09-05 12:27:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:18,960 INFO L225 Difference]: With dead ends: 1068 [2019-09-05 12:27:18,960 INFO L226 Difference]: Without dead ends: 1065 [2019-09-05 12:27:18,961 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:27:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-09-05 12:27:19,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 937. [2019-09-05 12:27:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 937 states. [2019-09-05 12:27:19,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1395 transitions. [2019-09-05 12:27:19,167 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1395 transitions. Word has length 90 [2019-09-05 12:27:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:19,168 INFO L475 AbstractCegarLoop]: Abstraction has 937 states and 1395 transitions. [2019-09-05 12:27:19,168 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-05 12:27:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1395 transitions. [2019-09-05 12:27:19,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-05 12:27:19,172 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:19,172 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:19,173 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1275934634, now seen corresponding path program 2 times [2019-09-05 12:27:19,173 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:19,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:19,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:19,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:19,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:19,181 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:19,181 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:19,181 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:19,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:27:19,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:27:19,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:19,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-05 12:27:19,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:27:19,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:19,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-05 12:27:19,520 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-05 12:27:19,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-05 12:27:19,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:27:19,521 INFO L87 Difference]: Start difference. First operand 937 states and 1395 transitions. Second operand 11 states. [2019-09-05 12:27:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:20,233 INFO L93 Difference]: Finished difference Result 1077 states and 1612 transitions. [2019-09-05 12:27:20,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 12:27:20,233 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2019-09-05 12:27:20,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:20,239 INFO L225 Difference]: With dead ends: 1077 [2019-09-05 12:27:20,240 INFO L226 Difference]: Without dead ends: 1075 [2019-09-05 12:27:20,241 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-09-05 12:27:20,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2019-09-05 12:27:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1056. [2019-09-05 12:27:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2019-09-05 12:27:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1591 transitions. [2019-09-05 12:27:20,436 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1591 transitions. Word has length 93 [2019-09-05 12:27:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:20,436 INFO L475 AbstractCegarLoop]: Abstraction has 1056 states and 1591 transitions. [2019-09-05 12:27:20,436 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-05 12:27:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1591 transitions. [2019-09-05 12:27:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-05 12:27:20,439 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:20,439 INFO L399 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:20,439 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:20,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1789236016, now seen corresponding path program 3 times [2019-09-05 12:27:20,440 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:20,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:20,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:20,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:20,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:20,444 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:20,444 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:20,444 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:20,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:27:20,498 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-05 12:27:20,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:20,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-05 12:27:20,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:20,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:27:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-09-05 12:27:20,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:20,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-05 12:27:20,698 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:27:20,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:27:20,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:27:20,700 INFO L87 Difference]: Start difference. First operand 1056 states and 1591 transitions. Second operand 13 states. [2019-09-05 12:27:22,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:22,384 INFO L93 Difference]: Finished difference Result 1115 states and 1668 transitions. [2019-09-05 12:27:22,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-05 12:27:22,384 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 98 [2019-09-05 12:27:22,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:22,392 INFO L225 Difference]: With dead ends: 1115 [2019-09-05 12:27:22,392 INFO L226 Difference]: Without dead ends: 1113 [2019-09-05 12:27:22,393 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:27:22,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2019-09-05 12:27:22,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1090. [2019-09-05 12:27:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1090 states. [2019-09-05 12:27:22,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1643 transitions. [2019-09-05 12:27:22,580 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1643 transitions. Word has length 98 [2019-09-05 12:27:22,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:22,581 INFO L475 AbstractCegarLoop]: Abstraction has 1090 states and 1643 transitions. [2019-09-05 12:27:22,581 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:27:22,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1643 transitions. [2019-09-05 12:27:22,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-05 12:27:22,584 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:22,584 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:22,584 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:22,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:22,584 INFO L82 PathProgramCache]: Analyzing trace with hash 387878514, now seen corresponding path program 6 times [2019-09-05 12:27:22,585 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:22,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:22,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:22,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:22,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:22,590 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:22,590 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:22,590 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:22,602 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:22,646 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-09-05 12:27:22,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:22,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-05 12:27:22,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 38 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2019-09-05 12:27:22,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:22,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:27:22,804 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:27:22,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:27:22,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:27:22,805 INFO L87 Difference]: Start difference. First operand 1090 states and 1643 transitions. Second operand 10 states. [2019-09-05 12:27:23,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:23,663 INFO L93 Difference]: Finished difference Result 1659 states and 2474 transitions. [2019-09-05 12:27:23,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:27:23,664 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2019-09-05 12:27:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:23,669 INFO L225 Difference]: With dead ends: 1659 [2019-09-05 12:27:23,669 INFO L226 Difference]: Without dead ends: 1037 [2019-09-05 12:27:23,672 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:27:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2019-09-05 12:27:23,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 973. [2019-09-05 12:27:23,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2019-09-05 12:27:23,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1409 transitions. [2019-09-05 12:27:23,813 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1409 transitions. Word has length 110 [2019-09-05 12:27:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:23,814 INFO L475 AbstractCegarLoop]: Abstraction has 973 states and 1409 transitions. [2019-09-05 12:27:23,814 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:27:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1409 transitions. [2019-09-05 12:27:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-05 12:27:23,817 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:23,817 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:23,817 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:23,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1914877872, now seen corresponding path program 7 times [2019-09-05 12:27:23,818 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:23,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:23,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:23,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:23,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:23,822 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:23,823 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:23,823 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:23,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:23,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-05 12:27:23,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2019-09-05 12:27:24,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:24,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-05 12:27:24,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-05 12:27:24,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-05 12:27:24,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:27:24,153 INFO L87 Difference]: Start difference. First operand 973 states and 1409 transitions. Second operand 14 states. [2019-09-05 12:27:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:25,090 INFO L93 Difference]: Finished difference Result 1093 states and 1576 transitions. [2019-09-05 12:27:25,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 12:27:25,091 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 110 [2019-09-05 12:27:25,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:25,097 INFO L225 Difference]: With dead ends: 1093 [2019-09-05 12:27:25,097 INFO L226 Difference]: Without dead ends: 1090 [2019-09-05 12:27:25,098 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:27:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2019-09-05 12:27:25,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 980. [2019-09-05 12:27:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 980 states. [2019-09-05 12:27:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1415 transitions. [2019-09-05 12:27:25,256 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1415 transitions. Word has length 110 [2019-09-05 12:27:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:25,257 INFO L475 AbstractCegarLoop]: Abstraction has 980 states and 1415 transitions. [2019-09-05 12:27:25,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-05 12:27:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1415 transitions. [2019-09-05 12:27:25,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-05 12:27:25,259 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:25,260 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:25,260 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:25,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:25,260 INFO L82 PathProgramCache]: Analyzing trace with hash -294682017, now seen corresponding path program 8 times [2019-09-05 12:27:25,260 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:25,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:25,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:25,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:25,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:25,264 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:25,265 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:25,265 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:25,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:25,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:27:25,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:25,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 78 conjunts are in the unsatisfiable core [2019-09-05 12:27:25,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 31 proven. 95 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-09-05 12:27:25,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:25,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-05 12:27:25,733 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-05 12:27:25,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-05 12:27:25,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:27:25,733 INFO L87 Difference]: Start difference. First operand 980 states and 1415 transitions. Second operand 18 states. [2019-09-05 12:27:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:27,099 INFO L93 Difference]: Finished difference Result 1135 states and 1641 transitions. [2019-09-05 12:27:27,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-05 12:27:27,100 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 112 [2019-09-05 12:27:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:27,105 INFO L225 Difference]: With dead ends: 1135 [2019-09-05 12:27:27,105 INFO L226 Difference]: Without dead ends: 1132 [2019-09-05 12:27:27,106 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:27:27,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2019-09-05 12:27:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 994. [2019-09-05 12:27:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2019-09-05 12:27:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1432 transitions. [2019-09-05 12:27:27,291 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1432 transitions. Word has length 112 [2019-09-05 12:27:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:27,292 INFO L475 AbstractCegarLoop]: Abstraction has 994 states and 1432 transitions. [2019-09-05 12:27:27,292 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-05 12:27:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1432 transitions. [2019-09-05 12:27:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-05 12:27:27,294 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:27,295 INFO L399 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:27,295 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:27,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1936311221, now seen corresponding path program 4 times [2019-09-05 12:27:27,295 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:27,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:27,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:27,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:27,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:27,303 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:27,304 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:27,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:27,332 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:27:27,370 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:27:27,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:27,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 56 conjunts are in the unsatisfiable core [2019-09-05 12:27:27,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:27,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:27:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 34 proven. 146 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2019-09-05 12:27:27,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:27,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-05 12:27:27,801 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 12:27:27,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 12:27:27,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:27:27,801 INFO L87 Difference]: Start difference. First operand 994 states and 1432 transitions. Second operand 16 states. [2019-09-05 12:27:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:28,935 INFO L93 Difference]: Finished difference Result 1385 states and 2047 transitions. [2019-09-05 12:27:28,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:27:28,935 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 115 [2019-09-05 12:27:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:28,942 INFO L225 Difference]: With dead ends: 1385 [2019-09-05 12:27:28,942 INFO L226 Difference]: Without dead ends: 1383 [2019-09-05 12:27:28,943 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:27:28,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2019-09-05 12:27:29,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1125. [2019-09-05 12:27:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1125 states. [2019-09-05 12:27:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1614 transitions. [2019-09-05 12:27:29,172 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1614 transitions. Word has length 115 [2019-09-05 12:27:29,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:29,173 INFO L475 AbstractCegarLoop]: Abstraction has 1125 states and 1614 transitions. [2019-09-05 12:27:29,173 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 12:27:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1614 transitions. [2019-09-05 12:27:29,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-05 12:27:29,175 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:29,176 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:29,176 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:29,176 INFO L82 PathProgramCache]: Analyzing trace with hash -382802030, now seen corresponding path program 9 times [2019-09-05 12:27:29,176 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:29,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:29,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:29,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:29,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:29,181 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:29,181 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:29,181 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:29,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:27:29,236 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-05 12:27:29,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:29,237 WARN L254 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 78 conjunts are in the unsatisfiable core [2019-09-05 12:27:29,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:29,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:27:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 78 proven. 39 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2019-09-05 12:27:29,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:29,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-05 12:27:29,561 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 12:27:29,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 12:27:29,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:27:29,562 INFO L87 Difference]: Start difference. First operand 1125 states and 1614 transitions. Second operand 16 states. [2019-09-05 12:27:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:30,662 INFO L93 Difference]: Finished difference Result 1305 states and 1857 transitions. [2019-09-05 12:27:30,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 12:27:30,662 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 115 [2019-09-05 12:27:30,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:30,671 INFO L225 Difference]: With dead ends: 1305 [2019-09-05 12:27:30,672 INFO L226 Difference]: Without dead ends: 1302 [2019-09-05 12:27:30,673 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:27:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2019-09-05 12:27:30,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1256. [2019-09-05 12:27:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1256 states. [2019-09-05 12:27:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1797 transitions. [2019-09-05 12:27:30,899 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1797 transitions. Word has length 115 [2019-09-05 12:27:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:30,900 INFO L475 AbstractCegarLoop]: Abstraction has 1256 states and 1797 transitions. [2019-09-05 12:27:30,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 12:27:30,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1797 transitions. [2019-09-05 12:27:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-05 12:27:30,902 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:30,903 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:30,903 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:30,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:30,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1115368890, now seen corresponding path program 10 times [2019-09-05 12:27:30,903 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:30,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:30,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:30,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:30,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:30,908 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:30,908 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:30,908 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:30,933 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:30,964 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:27:30,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:30,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 70 conjunts are in the unsatisfiable core [2019-09-05 12:27:30,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:31,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:27:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 36 proven. 134 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2019-09-05 12:27:31,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:31,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-05 12:27:31,234 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-05 12:27:31,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-05 12:27:31,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:27:31,235 INFO L87 Difference]: Start difference. First operand 1256 states and 1797 transitions. Second operand 18 states. [2019-09-05 12:27:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:32,413 INFO L93 Difference]: Finished difference Result 1616 states and 2333 transitions. [2019-09-05 12:27:32,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:27:32,414 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 115 [2019-09-05 12:27:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:32,420 INFO L225 Difference]: With dead ends: 1616 [2019-09-05 12:27:32,420 INFO L226 Difference]: Without dead ends: 1613 [2019-09-05 12:27:32,421 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2019-09-05 12:27:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2019-09-05 12:27:32,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1446. [2019-09-05 12:27:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1446 states. [2019-09-05 12:27:32,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 2094 transitions. [2019-09-05 12:27:32,664 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 2094 transitions. Word has length 115 [2019-09-05 12:27:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:32,664 INFO L475 AbstractCegarLoop]: Abstraction has 1446 states and 2094 transitions. [2019-09-05 12:27:32,664 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-05 12:27:32,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 2094 transitions. [2019-09-05 12:27:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-09-05 12:27:32,667 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:32,667 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:32,667 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1057144847, now seen corresponding path program 11 times [2019-09-05 12:27:32,668 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:32,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:32,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:32,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:32,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:32,673 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:32,673 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:32,673 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:32,685 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:32,746 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-05 12:27:32,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:32,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-05 12:27:32,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 40 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2019-09-05 12:27:33,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:33,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-05 12:27:33,088 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:27:33,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:27:33,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:27:33,089 INFO L87 Difference]: Start difference. First operand 1446 states and 2094 transitions. Second operand 15 states. [2019-09-05 12:27:34,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:34,288 INFO L93 Difference]: Finished difference Result 1617 states and 2343 transitions. [2019-09-05 12:27:34,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-05 12:27:34,289 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 132 [2019-09-05 12:27:34,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:34,297 INFO L225 Difference]: With dead ends: 1617 [2019-09-05 12:27:34,298 INFO L226 Difference]: Without dead ends: 1614 [2019-09-05 12:27:34,299 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:27:34,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2019-09-05 12:27:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1473. [2019-09-05 12:27:34,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1473 states. [2019-09-05 12:27:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2124 transitions. [2019-09-05 12:27:34,789 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2124 transitions. Word has length 132 [2019-09-05 12:27:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:34,789 INFO L475 AbstractCegarLoop]: Abstraction has 1473 states and 2124 transitions. [2019-09-05 12:27:34,790 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:27:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2124 transitions. [2019-09-05 12:27:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-09-05 12:27:34,793 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:34,793 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:34,793 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:34,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:34,794 INFO L82 PathProgramCache]: Analyzing trace with hash 935066063, now seen corresponding path program 12 times [2019-09-05 12:27:34,794 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:34,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:34,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:34,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:34,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:34,799 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:34,800 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:34,800 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:34,817 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:34,858 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-05 12:27:34,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:34,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 64 conjunts are in the unsatisfiable core [2019-09-05 12:27:34,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:35,029 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:27:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 93 proven. 37 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2019-09-05 12:27:35,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:35,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-05 12:27:35,147 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:27:35,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:27:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:27:35,148 INFO L87 Difference]: Start difference. First operand 1473 states and 2124 transitions. Second operand 13 states. [2019-09-05 12:27:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:36,111 INFO L93 Difference]: Finished difference Result 1782 states and 2570 transitions. [2019-09-05 12:27:36,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 12:27:36,111 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 132 [2019-09-05 12:27:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:36,120 INFO L225 Difference]: With dead ends: 1782 [2019-09-05 12:27:36,120 INFO L226 Difference]: Without dead ends: 1779 [2019-09-05 12:27:36,121 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:27:36,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2019-09-05 12:27:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1508. [2019-09-05 12:27:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1508 states. [2019-09-05 12:27:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 2157 transitions. [2019-09-05 12:27:36,402 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 2157 transitions. Word has length 132 [2019-09-05 12:27:36,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:36,403 INFO L475 AbstractCegarLoop]: Abstraction has 1508 states and 2157 transitions. [2019-09-05 12:27:36,403 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:27:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 2157 transitions. [2019-09-05 12:27:36,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-09-05 12:27:36,405 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:36,405 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:36,405 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:36,405 INFO L82 PathProgramCache]: Analyzing trace with hash 498070720, now seen corresponding path program 13 times [2019-09-05 12:27:36,405 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:36,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:36,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:36,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:36,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:36,409 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:36,410 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:36,410 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:36,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:36,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 82 conjunts are in the unsatisfiable core [2019-09-05 12:27:36,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 39 proven. 131 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-09-05 12:27:36,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:36,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-05 12:27:36,989 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:27:36,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:27:36,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:27:36,990 INFO L87 Difference]: Start difference. First operand 1508 states and 2157 transitions. Second operand 19 states. [2019-09-05 12:27:38,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:38,755 INFO L93 Difference]: Finished difference Result 1700 states and 2444 transitions. [2019-09-05 12:27:38,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:27:38,756 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 134 [2019-09-05 12:27:38,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:38,763 INFO L225 Difference]: With dead ends: 1700 [2019-09-05 12:27:38,764 INFO L226 Difference]: Without dead ends: 1697 [2019-09-05 12:27:38,765 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:27:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2019-09-05 12:27:39,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1522. [2019-09-05 12:27:39,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1522 states. [2019-09-05 12:27:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2174 transitions. [2019-09-05 12:27:39,092 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2174 transitions. Word has length 134 [2019-09-05 12:27:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:39,093 INFO L475 AbstractCegarLoop]: Abstraction has 1522 states and 2174 transitions. [2019-09-05 12:27:39,093 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:27:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2174 transitions. [2019-09-05 12:27:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-05 12:27:39,095 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:39,095 INFO L399 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:39,096 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:39,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:39,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1073062444, now seen corresponding path program 5 times [2019-09-05 12:27:39,096 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:39,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:39,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:39,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:39,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:39,100 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:39,101 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:39,101 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:39,136 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:27:39,189 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-05 12:27:39,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:39,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-05 12:27:39,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 42 proven. 83 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-09-05 12:27:39,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:39,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-05 12:27:39,482 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:27:39,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:27:39,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:27:39,482 INFO L87 Difference]: Start difference. First operand 1522 states and 2174 transitions. Second operand 13 states. [2019-09-05 12:27:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:40,767 INFO L93 Difference]: Finished difference Result 1701 states and 2450 transitions. [2019-09-05 12:27:40,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 12:27:40,768 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 137 [2019-09-05 12:27:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:40,774 INFO L225 Difference]: With dead ends: 1701 [2019-09-05 12:27:40,774 INFO L226 Difference]: Without dead ends: 1699 [2019-09-05 12:27:40,775 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:27:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2019-09-05 12:27:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1546. [2019-09-05 12:27:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2019-09-05 12:27:41,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2207 transitions. [2019-09-05 12:27:41,102 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2207 transitions. Word has length 137 [2019-09-05 12:27:41,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:41,102 INFO L475 AbstractCegarLoop]: Abstraction has 1546 states and 2207 transitions. [2019-09-05 12:27:41,102 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:27:41,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2207 transitions. [2019-09-05 12:27:41,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-05 12:27:41,104 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:41,104 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:41,104 INFO L418 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:41,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:41,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2005214757, now seen corresponding path program 14 times [2019-09-05 12:27:41,105 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:41,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:41,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:41,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:41,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:41,109 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:41,109 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:41,109 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:27:41,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:41,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:27:41,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:41,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 86 conjunts are in the unsatisfiable core [2019-09-05 12:27:41,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 39 proven. 138 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-09-05 12:27:41,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:41,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-05 12:27:41,881 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-05 12:27:41,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-05 12:27:41,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:27:41,882 INFO L87 Difference]: Start difference. First operand 1546 states and 2207 transitions. Second operand 20 states. [2019-09-05 12:27:43,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:43,548 INFO L93 Difference]: Finished difference Result 1715 states and 2451 transitions. [2019-09-05 12:27:43,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:27:43,549 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 137 [2019-09-05 12:27:43,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:43,554 INFO L225 Difference]: With dead ends: 1715 [2019-09-05 12:27:43,554 INFO L226 Difference]: Without dead ends: 1712 [2019-09-05 12:27:43,555 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:27:43,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2019-09-05 12:27:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1557. [2019-09-05 12:27:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1557 states. [2019-09-05 12:27:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 2217 transitions. [2019-09-05 12:27:43,823 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 2217 transitions. Word has length 137 [2019-09-05 12:27:43,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:43,824 INFO L475 AbstractCegarLoop]: Abstraction has 1557 states and 2217 transitions. [2019-09-05 12:27:43,824 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-05 12:27:43,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 2217 transitions. [2019-09-05 12:27:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-05 12:27:43,826 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:43,826 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:43,826 INFO L418 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:43,826 INFO L82 PathProgramCache]: Analyzing trace with hash -13003847, now seen corresponding path program 15 times [2019-09-05 12:27:43,826 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:43,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:43,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:43,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:43,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:43,830 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:43,830 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:43,830 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:43,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:27:43,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-05 12:27:43,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:43,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-05 12:27:43,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:44,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:27:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 131 proven. 64 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2019-09-05 12:27:44,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:44,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-05 12:27:44,265 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-05 12:27:44,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-05 12:27:44,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-09-05 12:27:44,266 INFO L87 Difference]: Start difference. First operand 1557 states and 2217 transitions. Second operand 17 states. [2019-09-05 12:27:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:45,360 INFO L93 Difference]: Finished difference Result 1852 states and 2646 transitions. [2019-09-05 12:27:45,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 12:27:45,361 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 137 [2019-09-05 12:27:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:45,366 INFO L225 Difference]: With dead ends: 1852 [2019-09-05 12:27:45,366 INFO L226 Difference]: Without dead ends: 1849 [2019-09-05 12:27:45,367 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:27:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2019-09-05 12:27:45,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1542. [2019-09-05 12:27:45,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-09-05 12:27:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2197 transitions. [2019-09-05 12:27:45,754 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2197 transitions. Word has length 137 [2019-09-05 12:27:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:45,755 INFO L475 AbstractCegarLoop]: Abstraction has 1542 states and 2197 transitions. [2019-09-05 12:27:45,755 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-05 12:27:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2197 transitions. [2019-09-05 12:27:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-05 12:27:45,757 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:45,757 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:45,757 INFO L418 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:45,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1273965065, now seen corresponding path program 16 times [2019-09-05 12:27:45,758 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:45,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:45,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:45,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:45,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:45,761 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:45,761 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:45,761 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:45,771 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:27:45,811 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:27:45,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:45,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 96 conjunts are in the unsatisfiable core [2019-09-05 12:27:45,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:46,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:27:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 896 backedges. 67 proven. 175 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2019-09-05 12:27:46,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:46,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-05 12:27:46,274 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 12:27:46,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 12:27:46,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:27:46,275 INFO L87 Difference]: Start difference. First operand 1542 states and 2197 transitions. Second operand 21 states. [2019-09-05 12:27:47,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:47,697 INFO L93 Difference]: Finished difference Result 1839 states and 2657 transitions. [2019-09-05 12:27:47,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:27:47,698 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 142 [2019-09-05 12:27:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:47,703 INFO L225 Difference]: With dead ends: 1839 [2019-09-05 12:27:47,704 INFO L226 Difference]: Without dead ends: 1836 [2019-09-05 12:27:47,705 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2019-09-05 12:27:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2019-09-05 12:27:48,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1751. [2019-09-05 12:27:48,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1751 states. [2019-09-05 12:27:48,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2553 transitions. [2019-09-05 12:27:48,184 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2553 transitions. Word has length 142 [2019-09-05 12:27:48,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:48,184 INFO L475 AbstractCegarLoop]: Abstraction has 1751 states and 2553 transitions. [2019-09-05 12:27:48,184 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 12:27:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2553 transitions. [2019-09-05 12:27:48,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-05 12:27:48,186 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:48,186 INFO L399 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:48,186 INFO L418 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:48,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1983100819, now seen corresponding path program 6 times [2019-09-05 12:27:48,187 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:48,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:48,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:48,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:48,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:48,190 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:27:48,191 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:27:48,191 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:27:48,205 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:27:48,256 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-05 12:27:48,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:48,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 69 conjunts are in the unsatisfiable core [2019-09-05 12:27:48,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:50,452 WARN L188 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 19 [2019-09-05 12:27:52,492 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 17 [2019-09-05 12:27:54,537 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 21 [2019-09-05 12:27:56,595 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 22 [2019-09-05 12:27:56,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:27:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1063 backedges. 84 proven. 170 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2019-09-05 12:27:56,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:27:56,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-05 12:27:56,697 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 12:27:56,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 12:27:56,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:27:56,699 INFO L87 Difference]: Start difference. First operand 1751 states and 2553 transitions. Second operand 16 states. [2019-09-05 12:28:01,306 WARN L188 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2019-09-05 12:28:05,405 WARN L188 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2019-09-05 12:28:09,473 WARN L188 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2019-09-05 12:28:13,808 WARN L188 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2019-09-05 12:28:14,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:14,301 INFO L93 Difference]: Finished difference Result 1796 states and 2600 transitions. [2019-09-05 12:28:14,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:28:14,301 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 145 [2019-09-05 12:28:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:14,308 INFO L225 Difference]: With dead ends: 1796 [2019-09-05 12:28:14,308 INFO L226 Difference]: Without dead ends: 1794 [2019-09-05 12:28:14,309 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:28:14,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2019-09-05 12:28:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1771. [2019-09-05 12:28:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1771 states. [2019-09-05 12:28:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2575 transitions. [2019-09-05 12:28:14,798 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2575 transitions. Word has length 145 [2019-09-05 12:28:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:14,798 INFO L475 AbstractCegarLoop]: Abstraction has 1771 states and 2575 transitions. [2019-09-05 12:28:14,799 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 12:28:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2575 transitions. [2019-09-05 12:28:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-09-05 12:28:14,801 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:14,801 INFO L399 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:14,801 INFO L418 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:14,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1117612542, now seen corresponding path program 7 times [2019-09-05 12:28:14,802 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:14,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:14,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:14,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:28:14,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:14,805 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:14,805 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:14,805 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:14,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:14,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-05 12:28:14,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 75 proven. 56 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2019-09-05 12:28:14,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:14,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:28:14,953 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:28:14,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:28:14,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:28:14,954 INFO L87 Difference]: Start difference. First operand 1771 states and 2575 transitions. Second operand 9 states. [2019-09-05 12:28:15,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:15,711 INFO L93 Difference]: Finished difference Result 2305 states and 3475 transitions. [2019-09-05 12:28:15,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:28:15,712 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-09-05 12:28:15,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:15,719 INFO L225 Difference]: With dead ends: 2305 [2019-09-05 12:28:15,720 INFO L226 Difference]: Without dead ends: 2303 [2019-09-05 12:28:15,721 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:28:15,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2019-09-05 12:28:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2149. [2019-09-05 12:28:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2149 states. [2019-09-05 12:28:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 3254 transitions. [2019-09-05 12:28:16,259 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 3254 transitions. Word has length 152 [2019-09-05 12:28:16,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:16,260 INFO L475 AbstractCegarLoop]: Abstraction has 2149 states and 3254 transitions. [2019-09-05 12:28:16,260 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:28:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 3254 transitions. [2019-09-05 12:28:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-05 12:28:16,262 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:16,262 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:16,262 INFO L418 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:16,263 INFO L82 PathProgramCache]: Analyzing trace with hash -957654830, now seen corresponding path program 17 times [2019-09-05 12:28:16,263 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:16,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:16,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:16,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:16,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:16,267 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:16,267 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:16,267 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:16,278 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:28:16,317 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-05 12:28:16,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:28:16,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-05 12:28:16,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 399 proven. 60 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2019-09-05 12:28:16,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:16,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:28:16,529 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:28:16,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:28:16,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:28:16,530 INFO L87 Difference]: Start difference. First operand 2149 states and 3254 transitions. Second operand 9 states. [2019-09-05 12:28:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:18,646 INFO L93 Difference]: Finished difference Result 3339 states and 5064 transitions. [2019-09-05 12:28:18,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 12:28:18,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 154 [2019-09-05 12:28:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:18,651 INFO L225 Difference]: With dead ends: 3339 [2019-09-05 12:28:18,651 INFO L226 Difference]: Without dead ends: 2178 [2019-09-05 12:28:18,655 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:28:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2019-09-05 12:28:19,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 2063. [2019-09-05 12:28:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2063 states. [2019-09-05 12:28:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 3071 transitions. [2019-09-05 12:28:19,108 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 3071 transitions. Word has length 154 [2019-09-05 12:28:19,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:19,109 INFO L475 AbstractCegarLoop]: Abstraction has 2063 states and 3071 transitions. [2019-09-05 12:28:19,109 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:28:19,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 3071 transitions. [2019-09-05 12:28:19,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-05 12:28:19,111 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:19,111 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:19,111 INFO L418 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:19,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1444136912, now seen corresponding path program 18 times [2019-09-05 12:28:19,112 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:19,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:19,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:19,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:28:19,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:19,115 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:19,115 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:19,115 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:19,126 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:28:19,170 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-05 12:28:19,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:28:19,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 68 conjunts are in the unsatisfiable core [2019-09-05 12:28:19,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:19,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 113 proven. 67 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2019-09-05 12:28:19,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:19,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-05 12:28:19,447 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-05 12:28:19,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-05 12:28:19,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:28:19,447 INFO L87 Difference]: Start difference. First operand 2063 states and 3071 transitions. Second operand 14 states. [2019-09-05 12:28:20,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:20,871 INFO L93 Difference]: Finished difference Result 2460 states and 3690 transitions. [2019-09-05 12:28:20,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 12:28:20,871 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 154 [2019-09-05 12:28:20,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:20,876 INFO L225 Difference]: With dead ends: 2460 [2019-09-05 12:28:20,877 INFO L226 Difference]: Without dead ends: 2457 [2019-09-05 12:28:20,878 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:28:20,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2019-09-05 12:28:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2059. [2019-09-05 12:28:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2019-09-05 12:28:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 3062 transitions. [2019-09-05 12:28:21,318 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 3062 transitions. Word has length 154 [2019-09-05 12:28:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:21,318 INFO L475 AbstractCegarLoop]: Abstraction has 2059 states and 3062 transitions. [2019-09-05 12:28:21,318 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-05 12:28:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 3062 transitions. [2019-09-05 12:28:21,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-05 12:28:21,321 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:21,321 INFO L399 BasicCegarLoop]: trace histogram [26, 25, 25, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:21,321 INFO L418 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:21,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:21,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1495464269, now seen corresponding path program 8 times [2019-09-05 12:28:21,321 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:21,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:21,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:21,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:28:21,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:21,326 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:21,326 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:21,327 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:21,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:28:21,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:28:21,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:28:21,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-05 12:28:21,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 50 proven. 116 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-09-05 12:28:21,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:21,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-05 12:28:21,707 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-05 12:28:21,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-05 12:28:21,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:28:21,707 INFO L87 Difference]: Start difference. First operand 2059 states and 3062 transitions. Second operand 14 states. [2019-09-05 12:28:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:23,423 INFO L93 Difference]: Finished difference Result 2311 states and 3465 transitions. [2019-09-05 12:28:23,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 12:28:23,423 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 159 [2019-09-05 12:28:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:23,427 INFO L225 Difference]: With dead ends: 2311 [2019-09-05 12:28:23,427 INFO L226 Difference]: Without dead ends: 2309 [2019-09-05 12:28:23,428 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:28:23,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2019-09-05 12:28:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2076. [2019-09-05 12:28:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2019-09-05 12:28:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3087 transitions. [2019-09-05 12:28:23,936 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3087 transitions. Word has length 159 [2019-09-05 12:28:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:23,937 INFO L475 AbstractCegarLoop]: Abstraction has 2076 states and 3087 transitions. [2019-09-05 12:28:23,937 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-05 12:28:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3087 transitions. [2019-09-05 12:28:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-05 12:28:23,939 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:23,939 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:23,940 INFO L418 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:23,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:23,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2073503386, now seen corresponding path program 19 times [2019-09-05 12:28:23,940 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:23,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:23,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:23,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:28:23,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:23,943 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:23,943 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:23,944 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:23,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:24,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 90 conjunts are in the unsatisfiable core [2019-09-05 12:28:24,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 47 proven. 180 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2019-09-05 12:28:24,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:24,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-05 12:28:24,566 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 12:28:24,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 12:28:24,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:28:24,567 INFO L87 Difference]: Start difference. First operand 2076 states and 3087 transitions. Second operand 21 states. [2019-09-05 12:28:26,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:26,575 INFO L93 Difference]: Finished difference Result 2308 states and 3438 transitions. [2019-09-05 12:28:26,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-05 12:28:26,576 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 159 [2019-09-05 12:28:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:26,579 INFO L225 Difference]: With dead ends: 2308 [2019-09-05 12:28:26,579 INFO L226 Difference]: Without dead ends: 2305 [2019-09-05 12:28:26,580 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2019-09-05 12:28:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2019-09-05 12:28:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 2084. [2019-09-05 12:28:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2084 states. [2019-09-05 12:28:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 3093 transitions. [2019-09-05 12:28:27,028 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 3093 transitions. Word has length 159 [2019-09-05 12:28:27,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:27,029 INFO L475 AbstractCegarLoop]: Abstraction has 2084 states and 3093 transitions. [2019-09-05 12:28:27,029 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 12:28:27,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 3093 transitions. [2019-09-05 12:28:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-05 12:28:27,031 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:27,032 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:27,032 INFO L418 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2083741959, now seen corresponding path program 20 times [2019-09-05 12:28:27,032 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:27,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:27,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:27,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:27,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:27,036 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:27,036 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:27,036 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:27,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:28:27,113 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:28:27,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:28:27,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 93 conjunts are in the unsatisfiable core [2019-09-05 12:28:27,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:27,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 48 proven. 120 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2019-09-05 12:28:27,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:27,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-05 12:28:27,627 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:28:27,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:28:27,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:28:27,628 INFO L87 Difference]: Start difference. First operand 2084 states and 3093 transitions. Second operand 19 states. [2019-09-05 12:28:29,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:29,565 INFO L93 Difference]: Finished difference Result 2331 states and 3464 transitions. [2019-09-05 12:28:29,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:28:29,566 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 162 [2019-09-05 12:28:29,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:29,569 INFO L225 Difference]: With dead ends: 2331 [2019-09-05 12:28:29,570 INFO L226 Difference]: Without dead ends: 2328 [2019-09-05 12:28:29,571 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2019-09-05 12:28:29,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2019-09-05 12:28:30,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2261. [2019-09-05 12:28:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2261 states. [2019-09-05 12:28:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 3382 transitions. [2019-09-05 12:28:30,134 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 3382 transitions. Word has length 162 [2019-09-05 12:28:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:30,134 INFO L475 AbstractCegarLoop]: Abstraction has 2261 states and 3382 transitions. [2019-09-05 12:28:30,134 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:28:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 3382 transitions. [2019-09-05 12:28:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-05 12:28:30,137 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:30,137 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:30,137 INFO L418 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:30,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:30,137 INFO L82 PathProgramCache]: Analyzing trace with hash -219014427, now seen corresponding path program 21 times [2019-09-05 12:28:30,138 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:30,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:30,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:30,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:28:30,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:30,144 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:30,144 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:30,145 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:30,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:28:30,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-05 12:28:30,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:28:30,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 88 conjunts are in the unsatisfiable core [2019-09-05 12:28:30,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:30,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 131 proven. 88 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2019-09-05 12:28:30,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:30,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-05 12:28:30,779 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:28:30,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:28:30,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:28:30,780 INFO L87 Difference]: Start difference. First operand 2261 states and 3382 transitions. Second operand 19 states. [2019-09-05 12:28:38,545 WARN L188 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2019-09-05 12:28:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:39,092 INFO L93 Difference]: Finished difference Result 2571 states and 3834 transitions. [2019-09-05 12:28:39,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:28:39,092 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 162 [2019-09-05 12:28:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:39,097 INFO L225 Difference]: With dead ends: 2571 [2019-09-05 12:28:39,097 INFO L226 Difference]: Without dead ends: 2568 [2019-09-05 12:28:39,098 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:28:39,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2019-09-05 12:28:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 1943. [2019-09-05 12:28:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1943 states. [2019-09-05 12:28:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 2844 transitions. [2019-09-05 12:28:39,612 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 2844 transitions. Word has length 162 [2019-09-05 12:28:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:39,612 INFO L475 AbstractCegarLoop]: Abstraction has 1943 states and 2844 transitions. [2019-09-05 12:28:39,612 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:28:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 2844 transitions. [2019-09-05 12:28:39,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-05 12:28:39,615 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:39,615 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:39,615 INFO L418 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:39,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:39,615 INFO L82 PathProgramCache]: Analyzing trace with hash -133013571, now seen corresponding path program 22 times [2019-09-05 12:28:39,615 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:39,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:39,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:39,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:28:39,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:39,625 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:39,625 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:39,625 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:28:39,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:39,680 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:28:39,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:28:39,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 82 conjunts are in the unsatisfiable core [2019-09-05 12:28:39,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:40,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 52 proven. 246 refuted. 0 times theorem prover too weak. 974 trivial. 0 not checked. [2019-09-05 12:28:40,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:40,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-05 12:28:40,397 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 12:28:40,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 12:28:40,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:28:40,398 INFO L87 Difference]: Start difference. First operand 1943 states and 2844 transitions. Second operand 21 states. [2019-09-05 12:28:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:42,363 INFO L93 Difference]: Finished difference Result 2159 states and 3089 transitions. [2019-09-05 12:28:42,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:28:42,363 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 162 [2019-09-05 12:28:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:42,366 INFO L225 Difference]: With dead ends: 2159 [2019-09-05 12:28:42,366 INFO L226 Difference]: Without dead ends: 2156 [2019-09-05 12:28:42,367 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2019-09-05 12:28:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2019-09-05 12:28:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 2065. [2019-09-05 12:28:42,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2019-09-05 12:28:42,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 2993 transitions. [2019-09-05 12:28:42,879 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 2993 transitions. Word has length 162 [2019-09-05 12:28:42,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:42,879 INFO L475 AbstractCegarLoop]: Abstraction has 2065 states and 2993 transitions. [2019-09-05 12:28:42,879 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 12:28:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 2993 transitions. [2019-09-05 12:28:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-09-05 12:28:42,882 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:42,882 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:42,882 INFO L418 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:42,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:42,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1641554154, now seen corresponding path program 23 times [2019-09-05 12:28:42,883 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:42,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:42,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:42,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:28:42,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:42,886 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:42,886 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:42,886 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:42,895 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:28:43,286 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-05 12:28:43,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:28:43,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 97 conjunts are in the unsatisfiable core [2019-09-05 12:28:43,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:43,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 82 proven. 224 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2019-09-05 12:28:43,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:43,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-05 12:28:43,923 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:28:43,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:28:43,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:28:43,923 INFO L87 Difference]: Start difference. First operand 2065 states and 2993 transitions. Second operand 24 states. [2019-09-05 12:28:46,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:46,092 INFO L93 Difference]: Finished difference Result 2560 states and 3757 transitions. [2019-09-05 12:28:46,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-05 12:28:46,093 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 164 [2019-09-05 12:28:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:46,097 INFO L225 Difference]: With dead ends: 2560 [2019-09-05 12:28:46,097 INFO L226 Difference]: Without dead ends: 2557 [2019-09-05 12:28:46,098 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2019-09-05 12:28:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2019-09-05 12:28:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2183. [2019-09-05 12:28:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2183 states. [2019-09-05 12:28:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 3162 transitions. [2019-09-05 12:28:46,723 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 3162 transitions. Word has length 164 [2019-09-05 12:28:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:46,723 INFO L475 AbstractCegarLoop]: Abstraction has 2183 states and 3162 transitions. [2019-09-05 12:28:46,724 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:28:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 3162 transitions. [2019-09-05 12:28:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-09-05 12:28:46,727 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:46,727 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:46,727 INFO L418 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:46,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2116353871, now seen corresponding path program 24 times [2019-09-05 12:28:46,728 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:46,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:46,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:46,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:28:46,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:46,731 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:46,731 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:46,731 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:46,740 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:28:49,836 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-05 12:28:49,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:28:49,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 113 conjunts are in the unsatisfiable core [2019-09-05 12:28:49,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:52,254 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 38 [2019-09-05 12:28:54,304 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 37 [2019-09-05 12:28:56,353 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 39 [2019-09-05 12:28:58,403 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 36 [2019-09-05 12:28:58,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 187 proven. 113 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2019-09-05 12:28:58,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:58,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-05 12:28:58,536 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 12:28:58,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 12:28:58,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:28:58,537 INFO L87 Difference]: Start difference. First operand 2183 states and 3162 transitions. Second operand 21 states. [2019-09-05 12:29:01,320 WARN L188 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 40 [2019-09-05 12:29:05,855 WARN L188 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2019-09-05 12:29:10,502 WARN L188 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2019-09-05 12:29:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:11,241 INFO L93 Difference]: Finished difference Result 2659 states and 3878 transitions. [2019-09-05 12:29:11,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:29:11,241 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 167 [2019-09-05 12:29:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:11,245 INFO L225 Difference]: With dead ends: 2659 [2019-09-05 12:29:11,245 INFO L226 Difference]: Without dead ends: 2656 [2019-09-05 12:29:11,246 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2019-09-05 12:29:11,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2019-09-05 12:29:11,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2344. [2019-09-05 12:29:11,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2344 states. [2019-09-05 12:29:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3411 transitions. [2019-09-05 12:29:11,904 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3411 transitions. Word has length 167 [2019-09-05 12:29:11,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:11,904 INFO L475 AbstractCegarLoop]: Abstraction has 2344 states and 3411 transitions. [2019-09-05 12:29:11,905 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 12:29:11,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3411 transitions. [2019-09-05 12:29:11,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-09-05 12:29:11,908 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:11,908 INFO L399 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:11,908 INFO L418 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:11,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:11,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1626673276, now seen corresponding path program 9 times [2019-09-05 12:29:11,908 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:11,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:11,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:11,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:11,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:11,911 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:11,911 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:11,912 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:11,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:29:11,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-05 12:29:11,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:11,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-05 12:29:11,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:14,051 WARN L188 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 19 [2019-09-05 12:29:16,074 WARN L188 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 17 [2019-09-05 12:29:16,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1494 backedges. 146 proven. 83 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-09-05 12:29:16,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:16,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-05 12:29:16,125 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-05 12:29:16,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-05 12:29:16,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:29:16,126 INFO L87 Difference]: Start difference. First operand 2344 states and 3411 transitions. Second operand 14 states. [2019-09-05 12:29:18,554 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 20 [2019-09-05 12:29:20,836 WARN L188 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 18 [2019-09-05 12:29:22,867 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2019-09-05 12:29:25,245 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2019-09-05 12:29:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:26,215 INFO L93 Difference]: Finished difference Result 2785 states and 4109 transitions. [2019-09-05 12:29:26,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:29:26,215 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 172 [2019-09-05 12:29:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:26,220 INFO L225 Difference]: With dead ends: 2785 [2019-09-05 12:29:26,220 INFO L226 Difference]: Without dead ends: 2783 [2019-09-05 12:29:26,221 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:29:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2019-09-05 12:29:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2654. [2019-09-05 12:29:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-09-05 12:29:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3923 transitions. [2019-09-05 12:29:27,104 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3923 transitions. Word has length 172 [2019-09-05 12:29:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:27,104 INFO L475 AbstractCegarLoop]: Abstraction has 2654 states and 3923 transitions. [2019-09-05 12:29:27,104 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-05 12:29:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3923 transitions. [2019-09-05 12:29:27,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-09-05 12:29:27,108 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:27,108 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:27,108 INFO L418 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:27,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2013595601, now seen corresponding path program 25 times [2019-09-05 12:29:27,108 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:27,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:27,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:27,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:27,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:27,111 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:27,111 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:27,111 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:27,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:29:27,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-05 12:29:27,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 56 proven. 135 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2019-09-05 12:29:27,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:27,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-05 12:29:27,585 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-05 12:29:27,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-05 12:29:27,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2019-09-05 12:29:27,586 INFO L87 Difference]: Start difference. First operand 2654 states and 3923 transitions. Second operand 17 states. [2019-09-05 12:29:29,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:29,755 INFO L93 Difference]: Finished difference Result 2992 states and 4446 transitions. [2019-09-05 12:29:29,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:29:29,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 176 [2019-09-05 12:29:29,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:29,759 INFO L225 Difference]: With dead ends: 2992 [2019-09-05 12:29:29,759 INFO L226 Difference]: Without dead ends: 2989 [2019-09-05 12:29:29,760 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2019-09-05 12:29:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2019-09-05 12:29:30,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2948. [2019-09-05 12:29:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2948 states. [2019-09-05 12:29:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 4392 transitions. [2019-09-05 12:29:30,648 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 4392 transitions. Word has length 176 [2019-09-05 12:29:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:30,648 INFO L475 AbstractCegarLoop]: Abstraction has 2948 states and 4392 transitions. [2019-09-05 12:29:30,648 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-05 12:29:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 4392 transitions. [2019-09-05 12:29:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-09-05 12:29:30,654 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:30,654 INFO L399 BasicCegarLoop]: trace histogram [30, 29, 29, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:30,654 INFO L418 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:30,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:30,655 INFO L82 PathProgramCache]: Analyzing trace with hash 235524526, now seen corresponding path program 10 times [2019-09-05 12:29:30,655 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:30,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:30,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:30,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:30,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:30,659 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:30,659 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:30,659 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:30,670 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:29:30,713 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:29:30,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:30,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 68 conjunts are in the unsatisfiable core [2019-09-05 12:29:30,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:31,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1837 backedges. 58 proven. 317 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2019-09-05 12:29:31,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:31,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-05 12:29:31,102 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:29:31,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:29:31,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:29:31,102 INFO L87 Difference]: Start difference. First operand 2948 states and 4392 transitions. Second operand 19 states. [2019-09-05 12:29:33,891 WARN L188 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2019-09-05 12:29:36,091 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2019-09-05 12:29:38,274 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2019-09-05 12:29:38,744 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2019-09-05 12:29:40,078 WARN L188 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2019-09-05 12:29:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:41,880 INFO L93 Difference]: Finished difference Result 3663 states and 5541 transitions. [2019-09-05 12:29:41,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:29:41,881 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 181 [2019-09-05 12:29:41,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:41,887 INFO L225 Difference]: With dead ends: 3663 [2019-09-05 12:29:41,887 INFO L226 Difference]: Without dead ends: 3661 [2019-09-05 12:29:41,888 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2019-09-05 12:29:41,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2019-09-05 12:29:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 3203. [2019-09-05 12:29:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3203 states. [2019-09-05 12:29:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 4759 transitions. [2019-09-05 12:29:42,972 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 4759 transitions. Word has length 181 [2019-09-05 12:29:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:42,973 INFO L475 AbstractCegarLoop]: Abstraction has 3203 states and 4759 transitions. [2019-09-05 12:29:42,973 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:29:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 4759 transitions. [2019-09-05 12:29:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-09-05 12:29:42,978 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:42,978 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:42,979 INFO L418 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:42,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:42,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1746700939, now seen corresponding path program 26 times [2019-09-05 12:29:42,979 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:42,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:42,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:42,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:42,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:42,983 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:42,983 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:42,983 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:42,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:29:43,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:29:43,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:43,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 93 conjunts are in the unsatisfiable core [2019-09-05 12:29:43,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1714 backedges. 56 proven. 146 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2019-09-05 12:29:43,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:43,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-05 12:29:43,874 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:29:43,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:29:43,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:29:43,875 INFO L87 Difference]: Start difference. First operand 3203 states and 4759 transitions. Second operand 19 states. [2019-09-05 12:29:46,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:46,864 INFO L93 Difference]: Finished difference Result 3788 states and 5661 transitions. [2019-09-05 12:29:46,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:29:46,864 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 181 [2019-09-05 12:29:46,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:46,873 INFO L225 Difference]: With dead ends: 3788 [2019-09-05 12:29:46,873 INFO L226 Difference]: Without dead ends: 3785 [2019-09-05 12:29:46,875 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2019-09-05 12:29:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2019-09-05 12:29:48,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3511. [2019-09-05 12:29:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3511 states. [2019-09-05 12:29:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 5244 transitions. [2019-09-05 12:29:48,155 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 5244 transitions. Word has length 181 [2019-09-05 12:29:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:48,155 INFO L475 AbstractCegarLoop]: Abstraction has 3511 states and 5244 transitions. [2019-09-05 12:29:48,156 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:29:48,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 5244 transitions. [2019-09-05 12:29:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-09-05 12:29:48,160 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:48,160 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:48,160 INFO L418 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:48,160 INFO L82 PathProgramCache]: Analyzing trace with hash 590539451, now seen corresponding path program 27 times [2019-09-05 12:29:48,160 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:48,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:48,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:48,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:48,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:48,163 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:48,164 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:48,164 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:48,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:29:48,215 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-05 12:29:48,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:48,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 98 conjunts are in the unsatisfiable core [2019-09-05 12:29:48,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:48,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1714 backedges. 260 proven. 147 refuted. 2 times theorem prover too weak. 1305 trivial. 0 not checked. [2019-09-05 12:29:49,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:49,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-05 12:29:49,048 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-05 12:29:49,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-05 12:29:49,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=313, Unknown=3, NotChecked=0, Total=380 [2019-09-05 12:29:49,049 INFO L87 Difference]: Start difference. First operand 3511 states and 5244 transitions. Second operand 20 states. [2019-09-05 12:29:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:55,411 INFO L93 Difference]: Finished difference Result 3611 states and 5355 transitions. [2019-09-05 12:29:55,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:29:55,411 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 181 [2019-09-05 12:29:55,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:55,417 INFO L225 Difference]: With dead ends: 3611 [2019-09-05 12:29:55,417 INFO L226 Difference]: Without dead ends: 3608 [2019-09-05 12:29:55,418 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=585, Unknown=7, NotChecked=0, Total=702 [2019-09-05 12:29:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2019-09-05 12:29:56,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3579. [2019-09-05 12:29:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3579 states. [2019-09-05 12:29:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 5322 transitions. [2019-09-05 12:29:56,690 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 5322 transitions. Word has length 181 [2019-09-05 12:29:56,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:56,690 INFO L475 AbstractCegarLoop]: Abstraction has 3579 states and 5322 transitions. [2019-09-05 12:29:56,691 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-05 12:29:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 5322 transitions. [2019-09-05 12:29:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-09-05 12:29:56,695 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:56,695 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:56,695 INFO L418 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:56,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1034339526, now seen corresponding path program 28 times [2019-09-05 12:29:56,696 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:56,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:56,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:56,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:56,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:56,703 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:56,703 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:56,703 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:56,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:29:56,760 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:29:56,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:56,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 94 conjunts are in the unsatisfiable core [2019-09-05 12:29:56,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:57,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 75 proven. 293 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2019-09-05 12:29:57,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:57,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-05 12:29:57,267 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 12:29:57,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 12:29:57,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:29:57,267 INFO L87 Difference]: Start difference. First operand 3579 states and 5322 transitions. Second operand 23 states. [2019-09-05 12:30:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:00,192 INFO L93 Difference]: Finished difference Result 3782 states and 5557 transitions. [2019-09-05 12:30:00,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-05 12:30:00,192 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 184 [2019-09-05 12:30:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:00,198 INFO L225 Difference]: With dead ends: 3782 [2019-09-05 12:30:00,198 INFO L226 Difference]: Without dead ends: 3779 [2019-09-05 12:30:00,199 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2019-09-05 12:30:00,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2019-09-05 12:30:01,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3669. [2019-09-05 12:30:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3669 states. [2019-09-05 12:30:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3669 states to 3669 states and 5434 transitions. [2019-09-05 12:30:01,574 INFO L78 Accepts]: Start accepts. Automaton has 3669 states and 5434 transitions. Word has length 184 [2019-09-05 12:30:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:01,575 INFO L475 AbstractCegarLoop]: Abstraction has 3669 states and 5434 transitions. [2019-09-05 12:30:01,575 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 12:30:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3669 states and 5434 transitions. [2019-09-05 12:30:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-09-05 12:30:01,581 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:01,581 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:01,581 INFO L418 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1364698396, now seen corresponding path program 29 times [2019-09-05 12:30:01,581 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:01,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:01,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:01,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:01,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:01,585 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:01,585 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:01,585 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:01,599 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:30:01,822 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-05 12:30:01,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:01,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 104 conjunts are in the unsatisfiable core [2019-09-05 12:30:01,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:02,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 91 proven. 202 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2019-09-05 12:30:02,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:02,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-05 12:30:02,497 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 12:30:02,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 12:30:02,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:30:02,497 INFO L87 Difference]: Start difference. First operand 3669 states and 5434 transitions. Second operand 23 states. [2019-09-05 12:30:06,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:06,084 INFO L93 Difference]: Finished difference Result 3966 states and 5874 transitions. [2019-09-05 12:30:06,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:30:06,085 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 184 [2019-09-05 12:30:06,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:06,090 INFO L225 Difference]: With dead ends: 3966 [2019-09-05 12:30:06,091 INFO L226 Difference]: Without dead ends: 3963 [2019-09-05 12:30:06,091 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2019-09-05 12:30:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3963 states. [2019-09-05 12:30:07,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3963 to 3677. [2019-09-05 12:30:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3677 states. [2019-09-05 12:30:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 5440 transitions. [2019-09-05 12:30:07,434 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 5440 transitions. Word has length 184 [2019-09-05 12:30:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:07,434 INFO L475 AbstractCegarLoop]: Abstraction has 3677 states and 5440 transitions. [2019-09-05 12:30:07,434 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 12:30:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 5440 transitions. [2019-09-05 12:30:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-09-05 12:30:07,438 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:07,438 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:07,438 INFO L418 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:07,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:07,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1648924638, now seen corresponding path program 30 times [2019-09-05 12:30:07,439 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:07,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:07,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:07,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:07,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:07,441 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:07,441 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:07,441 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:07,462 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:30:07,519 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-05 12:30:07,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:07,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 81 conjunts are in the unsatisfiable core [2019-09-05 12:30:07,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:07,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1724 backedges. 165 proven. 106 refuted. 0 times theorem prover too weak. 1453 trivial. 0 not checked. [2019-09-05 12:30:07,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:07,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-05 12:30:07,824 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-05 12:30:07,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-05 12:30:07,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:30:07,825 INFO L87 Difference]: Start difference. First operand 3677 states and 5440 transitions. Second operand 14 states. [2019-09-05 12:30:12,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:12,803 INFO L93 Difference]: Finished difference Result 4249 states and 6332 transitions. [2019-09-05 12:30:12,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 12:30:12,803 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 184 [2019-09-05 12:30:12,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:12,817 INFO L225 Difference]: With dead ends: 4249 [2019-09-05 12:30:12,818 INFO L226 Difference]: Without dead ends: 4246 [2019-09-05 12:30:12,820 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:30:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4246 states. [2019-09-05 12:30:14,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4246 to 3656. [2019-09-05 12:30:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3656 states. [2019-09-05 12:30:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 5409 transitions. [2019-09-05 12:30:14,435 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 5409 transitions. Word has length 184 [2019-09-05 12:30:14,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:14,435 INFO L475 AbstractCegarLoop]: Abstraction has 3656 states and 5409 transitions. [2019-09-05 12:30:14,435 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-05 12:30:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 5409 transitions. [2019-09-05 12:30:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-05 12:30:14,439 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:14,439 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:14,439 INFO L418 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:14,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:14,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2023508235, now seen corresponding path program 31 times [2019-09-05 12:30:14,440 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:14,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:14,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:14,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:14,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:14,442 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:14,442 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:14,442 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:14,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:30:14,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-05 12:30:14,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:15,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 54 proven. 320 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2019-09-05 12:30:15,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:15,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-05 12:30:15,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-05 12:30:15,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-05 12:30:15,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:30:15,193 INFO L87 Difference]: Start difference. First operand 3656 states and 5409 transitions. Second operand 25 states. [2019-09-05 12:30:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:19,103 INFO L93 Difference]: Finished difference Result 3974 states and 5898 transitions. [2019-09-05 12:30:19,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-05 12:30:19,103 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 186 [2019-09-05 12:30:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:19,110 INFO L225 Difference]: With dead ends: 3974 [2019-09-05 12:30:19,110 INFO L226 Difference]: Without dead ends: 3971 [2019-09-05 12:30:19,112 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2019-09-05 12:30:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2019-09-05 12:30:20,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 3702. [2019-09-05 12:30:20,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3702 states. [2019-09-05 12:30:20,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 5483 transitions. [2019-09-05 12:30:20,662 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 5483 transitions. Word has length 186 [2019-09-05 12:30:20,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:20,662 INFO L475 AbstractCegarLoop]: Abstraction has 3702 states and 5483 transitions. [2019-09-05 12:30:20,662 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-05 12:30:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 5483 transitions. [2019-09-05 12:30:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-05 12:30:20,667 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:20,667 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:20,667 INFO L418 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:20,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:20,668 INFO L82 PathProgramCache]: Analyzing trace with hash 392221899, now seen corresponding path program 32 times [2019-09-05 12:30:20,668 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:20,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:20,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:20,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:20,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:20,670 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:20,670 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:20,671 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:20,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:30:20,746 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:30:20,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:20,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-05 12:30:20,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:21,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 54 proven. 320 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2019-09-05 12:30:21,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:21,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-05 12:30:21,485 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-05 12:30:21,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-05 12:30:21,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:30:21,485 INFO L87 Difference]: Start difference. First operand 3702 states and 5483 transitions. Second operand 25 states. [2019-09-05 12:30:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:25,770 INFO L93 Difference]: Finished difference Result 4297 states and 6401 transitions. [2019-09-05 12:30:25,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-05 12:30:25,770 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 186 [2019-09-05 12:30:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:25,778 INFO L225 Difference]: With dead ends: 4297 [2019-09-05 12:30:25,778 INFO L226 Difference]: Without dead ends: 4294 [2019-09-05 12:30:25,779 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2019-09-05 12:30:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2019-09-05 12:30:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4020. [2019-09-05 12:30:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4020 states. [2019-09-05 12:30:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 5980 transitions. [2019-09-05 12:30:27,547 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 5980 transitions. Word has length 186 [2019-09-05 12:30:27,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:27,547 INFO L475 AbstractCegarLoop]: Abstraction has 4020 states and 5980 transitions. [2019-09-05 12:30:27,547 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-05 12:30:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 5980 transitions. [2019-09-05 12:30:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-05 12:30:27,551 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:27,551 INFO L399 BasicCegarLoop]: trace histogram [30, 29, 29, 8, 8, 8, 8, 7, 7, 7, 7, 7, 5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:27,551 INFO L418 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2076936835, now seen corresponding path program 11 times [2019-09-05 12:30:27,551 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:27,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:27,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:27,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:27,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:27,554 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:27,554 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:27,555 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:27,564 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:30:27,665 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-05 12:30:27,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:27,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 89 conjunts are in the unsatisfiable core [2019-09-05 12:30:27,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1857 backedges. 68 proven. 327 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2019-09-05 12:30:28,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:28,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-05 12:30:28,308 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 12:30:28,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 12:30:28,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:30:28,309 INFO L87 Difference]: Start difference. First operand 4020 states and 5980 transitions. Second operand 23 states. [2019-09-05 12:30:31,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:31,525 INFO L93 Difference]: Finished difference Result 4317 states and 6452 transitions. [2019-09-05 12:30:31,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:30:31,525 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 189 [2019-09-05 12:30:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:31,532 INFO L225 Difference]: With dead ends: 4317 [2019-09-05 12:30:31,532 INFO L226 Difference]: Without dead ends: 4315 [2019-09-05 12:30:31,533 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:30:31,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2019-09-05 12:30:33,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 4051. [2019-09-05 12:30:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4051 states. [2019-09-05 12:30:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4051 states to 4051 states and 6017 transitions. [2019-09-05 12:30:33,304 INFO L78 Accepts]: Start accepts. Automaton has 4051 states and 6017 transitions. Word has length 189 [2019-09-05 12:30:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:33,304 INFO L475 AbstractCegarLoop]: Abstraction has 4051 states and 6017 transitions. [2019-09-05 12:30:33,304 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 12:30:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4051 states and 6017 transitions. [2019-09-05 12:30:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-05 12:30:33,308 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:33,308 INFO L399 BasicCegarLoop]: trace histogram [30, 29, 29, 8, 8, 8, 8, 7, 7, 7, 7, 7, 5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:33,308 INFO L418 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:33,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1963398875, now seen corresponding path program 12 times [2019-09-05 12:30:33,308 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:33,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:33,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:33,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:33,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:33,311 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:33,312 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:33,312 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:33,321 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:30:33,401 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-05 12:30:33,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:33,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 90 conjunts are in the unsatisfiable core [2019-09-05 12:30:33,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:33,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1857 backedges. 298 proven. 151 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2019-09-05 12:30:33,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:33,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-05 12:30:33,899 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:30:33,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:30:33,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:30:33,900 INFO L87 Difference]: Start difference. First operand 4051 states and 6017 transitions. Second operand 19 states. [2019-09-05 12:30:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:50,846 INFO L93 Difference]: Finished difference Result 4568 states and 6863 transitions. [2019-09-05 12:30:50,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:30:50,847 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 189 [2019-09-05 12:30:50,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:50,853 INFO L225 Difference]: With dead ends: 4568 [2019-09-05 12:30:50,853 INFO L226 Difference]: Without dead ends: 4566 [2019-09-05 12:30:50,854 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:30:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2019-09-05 12:30:52,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4289. [2019-09-05 12:30:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4289 states. [2019-09-05 12:30:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4289 states to 4289 states and 6416 transitions. [2019-09-05 12:30:52,767 INFO L78 Accepts]: Start accepts. Automaton has 4289 states and 6416 transitions. Word has length 189 [2019-09-05 12:30:52,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:52,767 INFO L475 AbstractCegarLoop]: Abstraction has 4289 states and 6416 transitions. [2019-09-05 12:30:52,767 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:30:52,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4289 states and 6416 transitions. [2019-09-05 12:30:52,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-05 12:30:52,771 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:52,771 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:52,771 INFO L418 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:52,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:52,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2045804094, now seen corresponding path program 33 times [2019-09-05 12:30:52,772 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:52,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:52,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:52,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:52,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:52,776 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:52,776 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:52,776 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:52,785 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:31:18,550 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-05 12:31:18,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:31:18,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 113 conjunts are in the unsatisfiable core [2019-09-05 12:31:18,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:31:21,786 WARN L188 SmtUtils]: Spent 2.22 s on a formula simplification that was a NOOP. DAG size: 38 [2019-09-05 12:31:21,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:31:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 230 proven. 138 refuted. 0 times theorem prover too weak. 1374 trivial. 0 not checked. [2019-09-05 12:31:21,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:31:21,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-05 12:31:21,993 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 12:31:21,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 12:31:21,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:31:21,993 INFO L87 Difference]: Start difference. First operand 4289 states and 6416 transitions. Second operand 23 states. [2019-09-05 12:31:23,807 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2019-09-05 12:31:24,179 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-09-05 12:31:29,822 WARN L188 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-09-05 12:31:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:31:31,545 INFO L93 Difference]: Finished difference Result 4774 states and 7123 transitions. [2019-09-05 12:31:31,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:31:31,545 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 189 [2019-09-05 12:31:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:31:31,552 INFO L225 Difference]: With dead ends: 4774 [2019-09-05 12:31:31,552 INFO L226 Difference]: Without dead ends: 4771 [2019-09-05 12:31:31,553 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2019-09-05 12:31:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2019-09-05 12:31:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 3960. [2019-09-05 12:31:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3960 states. [2019-09-05 12:31:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 5839 transitions. [2019-09-05 12:31:33,233 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 5839 transitions. Word has length 189 [2019-09-05 12:31:33,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:31:33,234 INFO L475 AbstractCegarLoop]: Abstraction has 3960 states and 5839 transitions. [2019-09-05 12:31:33,234 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 12:31:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 5839 transitions. [2019-09-05 12:31:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-05 12:31:33,237 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:31:33,237 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:31:33,237 INFO L418 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:31:33,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:31:33,238 INFO L82 PathProgramCache]: Analyzing trace with hash -849234994, now seen corresponding path program 34 times [2019-09-05 12:31:33,238 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:31:33,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:31:33,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:33,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:31:33,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:33,240 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:31:33,240 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:31:33,240 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:31:33,250 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:31:33,301 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:31:33,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:31:33,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 104 conjunts are in the unsatisfiable core [2019-09-05 12:31:33,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:31:33,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:31:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 101 proven. 283 refuted. 0 times theorem prover too weak. 1358 trivial. 0 not checked. [2019-09-05 12:31:33,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:31:33,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-05 12:31:33,945 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:31:33,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:31:33,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:31:33,946 INFO L87 Difference]: Start difference. First operand 3960 states and 5839 transitions. Second operand 24 states. [2019-09-05 12:31:37,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:31:37,432 INFO L93 Difference]: Finished difference Result 4114 states and 5994 transitions. [2019-09-05 12:31:37,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-05 12:31:37,433 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 189 [2019-09-05 12:31:37,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:31:37,439 INFO L225 Difference]: With dead ends: 4114 [2019-09-05 12:31:37,440 INFO L226 Difference]: Without dead ends: 4111 [2019-09-05 12:31:37,441 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2019-09-05 12:31:37,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2019-09-05 12:31:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 3950. [2019-09-05 12:31:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3950 states. [2019-09-05 12:31:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 5828 transitions. [2019-09-05 12:31:39,309 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 5828 transitions. Word has length 189 [2019-09-05 12:31:39,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:31:39,309 INFO L475 AbstractCegarLoop]: Abstraction has 3950 states and 5828 transitions. [2019-09-05 12:31:39,309 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:31:39,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 5828 transitions. [2019-09-05 12:31:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-09-05 12:31:39,313 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:31:39,313 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:31:39,313 INFO L418 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:31:39,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:31:39,313 INFO L82 PathProgramCache]: Analyzing trace with hash -398853966, now seen corresponding path program 35 times [2019-09-05 12:31:39,313 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:31:39,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:31:39,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:39,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:31:39,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:39,317 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:31:39,317 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:31:39,317 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:31:39,327 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:31:39,382 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-09-05 12:31:39,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:31:39,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-05 12:31:39,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:31:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2225 backedges. 555 proven. 126 refuted. 0 times theorem prover too weak. 1544 trivial. 0 not checked. [2019-09-05 12:31:49,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:31:49,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-05 12:31:49,535 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-05 12:31:49,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-05 12:31:49,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=89, Unknown=1, NotChecked=0, Total=110 [2019-09-05 12:31:49,535 INFO L87 Difference]: Start difference. First operand 3950 states and 5828 transitions. Second operand 11 states. [2019-09-05 12:33:14,563 WARN L188 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-09-05 12:33:27,749 WARN L188 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2019-09-05 12:34:26,725 WARN L188 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-09-05 12:34:33,110 WARN L188 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2019-09-05 12:35:02,892 WARN L188 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2019-09-05 12:35:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:35:20,943 INFO L93 Difference]: Finished difference Result 6091 states and 9082 transitions. [2019-09-05 12:35:20,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 12:35:20,944 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 198 [2019-09-05 12:35:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:35:20,950 INFO L225 Difference]: With dead ends: 6091 [2019-09-05 12:35:20,950 INFO L226 Difference]: Without dead ends: 4326 [2019-09-05 12:35:20,956 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 65.3s TimeCoverageRelationStatistics Valid=102, Invalid=261, Unknown=17, NotChecked=0, Total=380 [2019-09-05 12:35:20,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2019-09-05 12:35:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3978. [2019-09-05 12:35:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3978 states. [2019-09-05 12:35:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 5846 transitions. [2019-09-05 12:35:22,803 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 5846 transitions. Word has length 198 [2019-09-05 12:35:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:35:22,803 INFO L475 AbstractCegarLoop]: Abstraction has 3978 states and 5846 transitions. [2019-09-05 12:35:22,803 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-05 12:35:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 5846 transitions. [2019-09-05 12:35:22,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-09-05 12:35:22,808 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:35:22,808 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:35:22,808 INFO L418 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:35:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:35:22,808 INFO L82 PathProgramCache]: Analyzing trace with hash -34611824, now seen corresponding path program 36 times [2019-09-05 12:35:22,808 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:35:22,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:35:22,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:35:22,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:35:22,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:35:22,812 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:35:22,812 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:35:22,812 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:35:22,830 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:35:22,878 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-05 12:35:22,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:35:22,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 68 conjunts are in the unsatisfiable core [2019-09-05 12:35:22,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:35:23,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:35:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2225 backedges. 124 proven. 152 refuted. 0 times theorem prover too weak. 1949 trivial. 0 not checked. [2019-09-05 12:35:23,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:35:23,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-05 12:35:23,234 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:35:23,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:35:23,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:35:23,234 INFO L87 Difference]: Start difference. First operand 3978 states and 5846 transitions. Second operand 15 states. [2019-09-05 12:35:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:35:26,685 INFO L93 Difference]: Finished difference Result 4834 states and 7193 transitions. [2019-09-05 12:35:26,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-05 12:35:26,685 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 198 [2019-09-05 12:35:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:35:26,694 INFO L225 Difference]: With dead ends: 4834 [2019-09-05 12:35:26,694 INFO L226 Difference]: Without dead ends: 4831 [2019-09-05 12:35:26,696 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:35:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4831 states. [2019-09-05 12:35:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4831 to 3995. [2019-09-05 12:35:28,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3995 states. [2019-09-05 12:35:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3995 states to 3995 states and 5872 transitions. [2019-09-05 12:35:28,670 INFO L78 Accepts]: Start accepts. Automaton has 3995 states and 5872 transitions. Word has length 198 [2019-09-05 12:35:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:35:28,670 INFO L475 AbstractCegarLoop]: Abstraction has 3995 states and 5872 transitions. [2019-09-05 12:35:28,670 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:35:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3995 states and 5872 transitions. [2019-09-05 12:35:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-09-05 12:35:28,673 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:35:28,674 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:35:28,674 INFO L418 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:35:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:35:28,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1620846484, now seen corresponding path program 37 times [2019-09-05 12:35:28,674 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:35:28,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:35:28,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:35:28,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:35:28,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:35:28,677 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:35:28,677 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:35:28,677 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:35:28,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:35:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:35:28,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 133 conjunts are in the unsatisfiable core [2019-09-05 12:35:28,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:35:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1765 backedges. 54 proven. 355 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2019-09-05 12:35:29,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:35:29,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-05 12:35:29,718 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-05 12:35:29,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-05 12:35:29,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:35:29,719 INFO L87 Difference]: Start difference. First operand 3995 states and 5872 transitions. Second operand 28 states. [2019-09-05 12:35:34,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:35:34,666 INFO L93 Difference]: Finished difference Result 4569 states and 6748 transitions. [2019-09-05 12:35:34,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-05 12:35:34,666 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 194 [2019-09-05 12:35:34,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:35:34,674 INFO L225 Difference]: With dead ends: 4569 [2019-09-05 12:35:34,674 INFO L226 Difference]: Without dead ends: 4566 [2019-09-05 12:35:34,675 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2019-09-05 12:35:34,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2019-09-05 12:35:36,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4284. [2019-09-05 12:35:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4284 states. [2019-09-05 12:35:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4284 states to 4284 states and 6312 transitions. [2019-09-05 12:35:36,794 INFO L78 Accepts]: Start accepts. Automaton has 4284 states and 6312 transitions. Word has length 194 [2019-09-05 12:35:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:35:36,794 INFO L475 AbstractCegarLoop]: Abstraction has 4284 states and 6312 transitions. [2019-09-05 12:35:36,794 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-05 12:35:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 4284 states and 6312 transitions. [2019-09-05 12:35:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-09-05 12:35:36,798 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:35:36,798 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:35:36,798 INFO L418 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:35:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:35:36,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1402917718, now seen corresponding path program 38 times [2019-09-05 12:35:36,799 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:35:36,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:35:36,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:35:36,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:35:36,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:35:36,803 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:35:36,803 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:35:36,803 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:35:36,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:35:36,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:35:36,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:35:36,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 97 conjunts are in the unsatisfiable core [2019-09-05 12:35:36,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:35:37,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:35:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2236 backedges. 64 proven. 188 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2019-09-05 12:35:37,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:35:37,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-05 12:35:37,497 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-05 12:35:37,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-05 12:35:37,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:35:37,497 INFO L87 Difference]: Start difference. First operand 4284 states and 6312 transitions. Second operand 20 states. [2019-09-05 12:35:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:35:41,523 INFO L93 Difference]: Finished difference Result 4615 states and 6815 transitions. [2019-09-05 12:35:41,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:35:41,523 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 203 [2019-09-05 12:35:41,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:35:41,530 INFO L225 Difference]: With dead ends: 4615 [2019-09-05 12:35:41,530 INFO L226 Difference]: Without dead ends: 4612 [2019-09-05 12:35:41,531 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2019-09-05 12:35:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2019-09-05 12:35:43,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 4288. [2019-09-05 12:35:43,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4288 states. [2019-09-05 12:35:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4288 states to 4288 states and 6315 transitions. [2019-09-05 12:35:43,650 INFO L78 Accepts]: Start accepts. Automaton has 4288 states and 6315 transitions. Word has length 203 [2019-09-05 12:35:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:35:43,650 INFO L475 AbstractCegarLoop]: Abstraction has 4288 states and 6315 transitions. [2019-09-05 12:35:43,650 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-05 12:35:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4288 states and 6315 transitions. [2019-09-05 12:35:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-09-05 12:35:43,653 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:35:43,654 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:35:43,654 INFO L418 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:35:43,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:35:43,654 INFO L82 PathProgramCache]: Analyzing trace with hash -228368618, now seen corresponding path program 39 times [2019-09-05 12:35:43,654 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:35:43,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:35:43,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:35:43,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:35:43,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:35:43,657 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:35:43,657 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:35:43,657 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:35:43,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:35:43,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-05 12:35:43,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:35:43,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-05 12:35:43,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:35:44,448 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-09-05 12:35:44,634 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-09-05 12:35:44,866 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-09-05 12:35:45,352 WARN L188 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-09-05 12:35:45,823 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-09-05 12:35:46,986 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2019-09-05 12:35:47,076 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:35:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2236 backedges. 356 proven. 193 refuted. 0 times theorem prover too weak. 1687 trivial. 0 not checked. [2019-09-05 12:35:47,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:35:47,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-05 12:35:47,329 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:35:47,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:35:47,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=287, Unknown=6, NotChecked=0, Total=342 [2019-09-05 12:35:47,329 INFO L87 Difference]: Start difference. First operand 4288 states and 6315 transitions. Second operand 19 states. [2019-09-05 12:35:48,529 WARN L188 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2019-09-05 12:35:49,396 WARN L188 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-09-05 12:35:59,943 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2019-09-05 12:36:01,537 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2019-09-05 12:36:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:36:02,987 INFO L93 Difference]: Finished difference Result 4754 states and 6944 transitions. [2019-09-05 12:36:02,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:36:02,988 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 203 [2019-09-05 12:36:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:36:02,994 INFO L225 Difference]: With dead ends: 4754 [2019-09-05 12:36:02,994 INFO L226 Difference]: Without dead ends: 4751 [2019-09-05 12:36:02,995 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=125, Invalid=727, Unknown=18, NotChecked=0, Total=870 [2019-09-05 12:36:02,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2019-09-05 12:36:05,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 4470. [2019-09-05 12:36:05,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4470 states. [2019-09-05 12:36:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4470 states to 4470 states and 6557 transitions. [2019-09-05 12:36:05,219 INFO L78 Accepts]: Start accepts. Automaton has 4470 states and 6557 transitions. Word has length 203 [2019-09-05 12:36:05,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:36:05,219 INFO L475 AbstractCegarLoop]: Abstraction has 4470 states and 6557 transitions. [2019-09-05 12:36:05,219 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:36:05,219 INFO L276 IsEmpty]: Start isEmpty. Operand 4470 states and 6557 transitions. [2019-09-05 12:36:05,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-09-05 12:36:05,224 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:36:05,224 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:36:05,224 INFO L418 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:36:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:36:05,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1122082841, now seen corresponding path program 40 times [2019-09-05 12:36:05,225 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:36:05,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:36:05,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:05,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:36:05,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:05,229 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:36:05,229 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:36:05,229 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:36:05,248 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:36:05,293 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:36:05,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:36:05,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 98 conjunts are in the unsatisfiable core [2019-09-05 12:36:05,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:36:05,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:36:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 83 proven. 359 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2019-09-05 12:36:05,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:36:05,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-05 12:36:05,974 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:36:05,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:36:05,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:36:05,975 INFO L87 Difference]: Start difference. First operand 4470 states and 6557 transitions. Second operand 24 states. [2019-09-05 12:36:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:36:10,453 INFO L93 Difference]: Finished difference Result 4801 states and 7010 transitions. [2019-09-05 12:36:10,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:36:10,453 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 206 [2019-09-05 12:36:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:36:10,461 INFO L225 Difference]: With dead ends: 4801 [2019-09-05 12:36:10,462 INFO L226 Difference]: Without dead ends: 4798 [2019-09-05 12:36:10,463 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2019-09-05 12:36:10,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2019-09-05 12:36:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4685. [2019-09-05 12:36:12,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4685 states. [2019-09-05 12:36:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 6879 transitions. [2019-09-05 12:36:12,987 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 6879 transitions. Word has length 206 [2019-09-05 12:36:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:36:12,988 INFO L475 AbstractCegarLoop]: Abstraction has 4685 states and 6879 transitions. [2019-09-05 12:36:12,988 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:36:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 6879 transitions. [2019-09-05 12:36:12,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-09-05 12:36:12,991 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:36:12,992 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:36:12,992 INFO L418 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:36:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:36:12,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1608564923, now seen corresponding path program 41 times [2019-09-05 12:36:12,992 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:36:12,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:36:12,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:12,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:36:12,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:12,996 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:36:12,996 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:36:12,996 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:36:13,004 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:36:13,261 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-05 12:36:13,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:36:13,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 108 conjunts are in the unsatisfiable core [2019-09-05 12:36:13,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:36:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 87 proven. 268 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2019-09-05 12:36:13,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:36:13,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-05 12:36:13,995 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:36:13,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:36:13,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:36:13,996 INFO L87 Difference]: Start difference. First operand 4685 states and 6879 transitions. Second operand 24 states. [2019-09-05 12:36:19,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:36:19,269 INFO L93 Difference]: Finished difference Result 5032 states and 7411 transitions. [2019-09-05 12:36:19,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-05 12:36:19,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 206 [2019-09-05 12:36:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:36:19,276 INFO L225 Difference]: With dead ends: 5032 [2019-09-05 12:36:19,276 INFO L226 Difference]: Without dead ends: 5029 [2019-09-05 12:36:19,277 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2019-09-05 12:36:19,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2019-09-05 12:36:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 4758. [2019-09-05 12:36:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4758 states. [2019-09-05 12:36:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 6983 transitions. [2019-09-05 12:36:21,796 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 6983 transitions. Word has length 206 [2019-09-05 12:36:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:36:21,797 INFO L475 AbstractCegarLoop]: Abstraction has 4758 states and 6983 transitions. [2019-09-05 12:36:21,797 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:36:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 6983 transitions. [2019-09-05 12:36:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-09-05 12:36:21,801 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:36:21,801 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:36:21,801 INFO L418 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:36:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:36:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash 811655679, now seen corresponding path program 42 times [2019-09-05 12:36:21,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:36:21,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:36:21,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:21,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:36:21,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:21,804 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:36:21,804 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:36:21,805 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:36:21,815 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:36:21,866 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-09-05 12:36:21,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:36:21,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 86 conjunts are in the unsatisfiable core [2019-09-05 12:36:21,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:36:22,421 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-09-05 12:36:22,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:36:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 248 proven. 236 refuted. 0 times theorem prover too weak. 1762 trivial. 0 not checked. [2019-09-05 12:36:22,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:36:22,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-05 12:36:22,564 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-05 12:36:22,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-05 12:36:22,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:36:22,565 INFO L87 Difference]: Start difference. First operand 4758 states and 6983 transitions. Second operand 18 states. [2019-09-05 12:36:25,122 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2019-09-05 12:36:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:36:27,155 INFO L93 Difference]: Finished difference Result 6142 states and 9155 transitions. [2019-09-05 12:36:27,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:36:27,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 206 [2019-09-05 12:36:27,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:36:27,164 INFO L225 Difference]: With dead ends: 6142 [2019-09-05 12:36:27,164 INFO L226 Difference]: Without dead ends: 6139 [2019-09-05 12:36:27,165 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:36:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6139 states. [2019-09-05 12:36:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6139 to 5720. [2019-09-05 12:36:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5720 states. [2019-09-05 12:36:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 8556 transitions. [2019-09-05 12:36:30,443 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 8556 transitions. Word has length 206 [2019-09-05 12:36:30,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:36:30,443 INFO L475 AbstractCegarLoop]: Abstraction has 5720 states and 8556 transitions. [2019-09-05 12:36:30,444 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-05 12:36:30,444 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 8556 transitions. [2019-09-05 12:36:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-09-05 12:36:30,448 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:36:30,448 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:36:30,448 INFO L418 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:36:30,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:36:30,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1069163875, now seen corresponding path program 43 times [2019-09-05 12:36:30,448 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:36:30,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:36:30,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:30,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:36:30,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:30,452 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:36:30,452 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:36:30,452 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:36:30,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:36:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:36:30,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-05 12:36:30,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:36:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 64 proven. 198 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2019-09-05 12:36:31,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:36:31,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-05 12:36:31,413 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 12:36:31,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 12:36:31,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:36:31,413 INFO L87 Difference]: Start difference. First operand 5720 states and 8556 transitions. Second operand 21 states. [2019-09-05 12:36:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:36:36,822 INFO L93 Difference]: Finished difference Result 6065 states and 9081 transitions. [2019-09-05 12:36:36,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-05 12:36:36,822 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 206 [2019-09-05 12:36:36,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:36:36,833 INFO L225 Difference]: With dead ends: 6065 [2019-09-05 12:36:36,833 INFO L226 Difference]: Without dead ends: 6062 [2019-09-05 12:36:36,835 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2019-09-05 12:36:36,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6062 states. [2019-09-05 12:36:40,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6062 to 5765. [2019-09-05 12:36:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5765 states. [2019-09-05 12:36:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5765 states to 5765 states and 8628 transitions. [2019-09-05 12:36:40,153 INFO L78 Accepts]: Start accepts. Automaton has 5765 states and 8628 transitions. Word has length 206 [2019-09-05 12:36:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:36:40,153 INFO L475 AbstractCegarLoop]: Abstraction has 5765 states and 8628 transitions. [2019-09-05 12:36:40,153 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 12:36:40,153 INFO L276 IsEmpty]: Start isEmpty. Operand 5765 states and 8628 transitions. [2019-09-05 12:36:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-09-05 12:36:40,158 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:36:40,158 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:36:40,158 INFO L418 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:36:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:36:40,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1263062420, now seen corresponding path program 44 times [2019-09-05 12:36:40,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:36:40,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:36:40,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:40,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:36:40,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:40,162 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:36:40,163 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:36:40,163 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:36:40,175 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:36:40,246 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:36:40,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:36:40,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-05 12:36:40,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:36:40,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:36:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 62 proven. 386 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2019-09-05 12:36:41,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:36:41,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-05 12:36:41,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-05 12:36:41,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-05 12:36:41,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:36:41,153 INFO L87 Difference]: Start difference. First operand 5765 states and 8628 transitions. Second operand 26 states. [2019-09-05 12:36:46,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:36:46,901 INFO L93 Difference]: Finished difference Result 6095 states and 9136 transitions. [2019-09-05 12:36:46,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-05 12:36:46,901 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 208 [2019-09-05 12:36:46,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:36:46,911 INFO L225 Difference]: With dead ends: 6095 [2019-09-05 12:36:46,911 INFO L226 Difference]: Without dead ends: 6088 [2019-09-05 12:36:46,912 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2019-09-05 12:36:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6088 states. [2019-09-05 12:36:50,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6088 to 5766. [2019-09-05 12:36:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5766 states. [2019-09-05 12:36:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5766 states to 5766 states and 8627 transitions. [2019-09-05 12:36:50,246 INFO L78 Accepts]: Start accepts. Automaton has 5766 states and 8627 transitions. Word has length 208 [2019-09-05 12:36:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:36:50,246 INFO L475 AbstractCegarLoop]: Abstraction has 5766 states and 8627 transitions. [2019-09-05 12:36:50,246 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-05 12:36:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 5766 states and 8627 transitions. [2019-09-05 12:36:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-09-05 12:36:50,250 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:36:50,251 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:36:50,251 INFO L418 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:36:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:36:50,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1142657492, now seen corresponding path program 45 times [2019-09-05 12:36:50,251 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:36:50,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:36:50,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:50,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:36:50,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:36:50,254 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:36:50,254 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:36:50,254 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:36:50,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:36:57,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-05 12:36:57,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:36:57,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-05 12:36:57,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:36:58,099 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-09-05 12:36:59,043 WARN L188 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-09-05 12:36:59,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:36:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 246 proven. 142 refuted. 0 times theorem prover too weak. 1864 trivial. 0 not checked. [2019-09-05 12:36:59,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:36:59,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-05 12:36:59,304 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 12:36:59,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 12:36:59,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:36:59,305 INFO L87 Difference]: Start difference. First operand 5766 states and 8627 transitions. Second operand 21 states. [2019-09-05 12:37:05,669 WARN L188 SmtUtils]: Spent 623.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-09-05 12:37:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:37:08,354 INFO L93 Difference]: Finished difference Result 6343 states and 9491 transitions. [2019-09-05 12:37:08,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:37:08,354 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 208 [2019-09-05 12:37:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:37:08,363 INFO L225 Difference]: With dead ends: 6343 [2019-09-05 12:37:08,363 INFO L226 Difference]: Without dead ends: 6340 [2019-09-05 12:37:08,364 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2019-09-05 12:37:08,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6340 states. [2019-09-05 12:37:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6340 to 5778. [2019-09-05 12:37:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5778 states. [2019-09-05 12:37:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5778 states to 5778 states and 8633 transitions. [2019-09-05 12:37:11,706 INFO L78 Accepts]: Start accepts. Automaton has 5778 states and 8633 transitions. Word has length 208 [2019-09-05 12:37:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:37:11,706 INFO L475 AbstractCegarLoop]: Abstraction has 5778 states and 8633 transitions. [2019-09-05 12:37:11,706 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 12:37:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 5778 states and 8633 transitions. [2019-09-05 12:37:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-09-05 12:37:11,711 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:37:11,711 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:37:11,711 INFO L418 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:37:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:37:11,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1521023468, now seen corresponding path program 46 times [2019-09-05 12:37:11,711 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:37:11,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:37:11,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:37:11,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:37:11,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:37:11,715 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:37:11,715 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:37:11,715 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:37:11,726 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:37:11,777 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:37:11,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:37:11,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 104 conjunts are in the unsatisfiable core [2019-09-05 12:37:11,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:37:12,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:37:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 127 proven. 319 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2019-09-05 12:37:12,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:37:12,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-05 12:37:12,545 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:37:12,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:37:12,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:37:12,546 INFO L87 Difference]: Start difference. First operand 5778 states and 8633 transitions. Second operand 24 states. [2019-09-05 12:37:12,920 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-09-05 12:37:13,450 WARN L188 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2019-09-05 12:37:14,668 WARN L188 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2019-09-05 12:37:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:37:19,171 INFO L93 Difference]: Finished difference Result 6493 states and 9736 transitions. [2019-09-05 12:37:19,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:37:19,172 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 208 [2019-09-05 12:37:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:37:19,182 INFO L225 Difference]: With dead ends: 6493 [2019-09-05 12:37:19,182 INFO L226 Difference]: Without dead ends: 6490 [2019-09-05 12:37:19,184 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2019-09-05 12:37:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2019-09-05 12:37:23,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 6232. [2019-09-05 12:37:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6232 states. [2019-09-05 12:37:23,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 9415 transitions. [2019-09-05 12:37:23,127 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 9415 transitions. Word has length 208 [2019-09-05 12:37:23,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:37:23,127 INFO L475 AbstractCegarLoop]: Abstraction has 6232 states and 9415 transitions. [2019-09-05 12:37:23,127 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:37:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 9415 transitions. [2019-09-05 12:37:23,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-09-05 12:37:23,132 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:37:23,132 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:37:23,132 INFO L418 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:37:23,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:37:23,132 INFO L82 PathProgramCache]: Analyzing trace with hash 834732850, now seen corresponding path program 47 times [2019-09-05 12:37:23,132 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:37:23,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:37:23,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:37:23,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:37:23,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:37:23,136 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:37:23,136 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:37:23,136 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:37:23,153 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:37:23,458 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-05 12:37:23,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:37:23,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 112 conjunts are in the unsatisfiable core [2019-09-05 12:37:23,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:37:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2259 backedges. 87 proven. 281 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2019-09-05 12:37:24,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:37:24,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-05 12:37:24,219 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-05 12:37:24,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-05 12:37:24,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:37:24,219 INFO L87 Difference]: Start difference. First operand 6232 states and 9415 transitions. Second operand 25 states. [2019-09-05 12:37:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:37:30,572 INFO L93 Difference]: Finished difference Result 6565 states and 9927 transitions. [2019-09-05 12:37:30,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-05 12:37:30,573 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 209 [2019-09-05 12:37:30,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:37:30,584 INFO L225 Difference]: With dead ends: 6565 [2019-09-05 12:37:30,584 INFO L226 Difference]: Without dead ends: 6562 [2019-09-05 12:37:30,585 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2019-09-05 12:37:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6562 states. [2019-09-05 12:37:34,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6562 to 6241. [2019-09-05 12:37:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6241 states. [2019-09-05 12:37:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6241 states to 6241 states and 9423 transitions. [2019-09-05 12:37:34,534 INFO L78 Accepts]: Start accepts. Automaton has 6241 states and 9423 transitions. Word has length 209 [2019-09-05 12:37:34,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:37:34,534 INFO L475 AbstractCegarLoop]: Abstraction has 6241 states and 9423 transitions. [2019-09-05 12:37:34,534 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-05 12:37:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 6241 states and 9423 transitions. [2019-09-05 12:37:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-05 12:37:34,539 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:37:34,539 INFO L399 BasicCegarLoop]: trace histogram [34, 33, 33, 9, 9, 9, 9, 8, 8, 8, 8, 8, 6, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:37:34,539 INFO L418 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:37:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:37:34,539 INFO L82 PathProgramCache]: Analyzing trace with hash 751644860, now seen corresponding path program 13 times [2019-09-05 12:37:34,540 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:37:34,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:37:34,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:37:34,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:37:34,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:37:34,542 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:37:34,542 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:37:34,543 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:37:34,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:37:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:37:34,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 93 conjunts are in the unsatisfiable core [2019-09-05 12:37:34,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:37:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 64 proven. 408 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2019-09-05 12:37:35,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:37:35,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-05 12:37:35,308 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:37:35,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:37:35,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:37:35,308 INFO L87 Difference]: Start difference. First operand 6241 states and 9423 transitions. Second operand 24 states. [2019-09-05 12:37:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:37:41,021 INFO L93 Difference]: Finished difference Result 6655 states and 10081 transitions. [2019-09-05 12:37:41,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-05 12:37:41,021 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 211 [2019-09-05 12:37:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:37:41,032 INFO L225 Difference]: With dead ends: 6655 [2019-09-05 12:37:41,033 INFO L226 Difference]: Without dead ends: 6653 [2019-09-05 12:37:41,034 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2019-09-05 12:37:41,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6653 states. [2019-09-05 12:37:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6653 to 6329. [2019-09-05 12:37:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6329 states. [2019-09-05 12:37:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 9546 transitions. [2019-09-05 12:37:45,030 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 9546 transitions. Word has length 211 [2019-09-05 12:37:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:37:45,030 INFO L475 AbstractCegarLoop]: Abstraction has 6329 states and 9546 transitions. [2019-09-05 12:37:45,031 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:37:45,031 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 9546 transitions. [2019-09-05 12:37:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-05 12:37:45,035 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:37:45,035 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:37:45,035 INFO L418 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:37:45,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:37:45,036 INFO L82 PathProgramCache]: Analyzing trace with hash -602100561, now seen corresponding path program 48 times [2019-09-05 12:37:45,036 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:37:45,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:37:45,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:37:45,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:37:45,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:37:45,039 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:37:45,039 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:37:45,039 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:37:45,048 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:37:48,320 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-05 12:37:48,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:37:48,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-05 12:37:48,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:37:50,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:37:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2264 backedges. 215 proven. 212 refuted. 0 times theorem prover too weak. 1837 trivial. 0 not checked. [2019-09-05 12:37:50,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:37:50,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-05 12:37:50,991 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 12:37:50,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 12:37:50,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=439, Unknown=1, NotChecked=0, Total=506 [2019-09-05 12:37:50,992 INFO L87 Difference]: Start difference. First operand 6329 states and 9546 transitions. Second operand 23 states. [2019-09-05 12:38:05,752 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 45 [2019-09-05 12:38:09,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:38:09,108 INFO L93 Difference]: Finished difference Result 7031 states and 10590 transitions. [2019-09-05 12:38:09,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:38:09,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 211 [2019-09-05 12:38:09,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:38:09,120 INFO L225 Difference]: With dead ends: 7031 [2019-09-05 12:38:09,120 INFO L226 Difference]: Without dead ends: 7028 [2019-09-05 12:38:09,122 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=117, Invalid=874, Unknown=1, NotChecked=0, Total=992 [2019-09-05 12:38:09,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7028 states. [2019-09-05 12:38:13,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7028 to 6436. [2019-09-05 12:38:13,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6436 states. [2019-09-05 12:38:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6436 states to 6436 states and 9651 transitions. [2019-09-05 12:38:13,172 INFO L78 Accepts]: Start accepts. Automaton has 6436 states and 9651 transitions. Word has length 211 [2019-09-05 12:38:13,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:38:13,172 INFO L475 AbstractCegarLoop]: Abstraction has 6436 states and 9651 transitions. [2019-09-05 12:38:13,172 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 12:38:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 6436 states and 9651 transitions. [2019-09-05 12:38:13,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-05 12:38:13,177 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:38:13,177 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:38:13,177 INFO L418 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:38:13,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:38:13,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2075628237, now seen corresponding path program 49 times [2019-09-05 12:38:13,178 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:38:13,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:38:13,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:38:13,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:38:13,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:38:13,181 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:38:13,181 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:38:13,181 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:38:13,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:38:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:38:13,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-05 12:38:13,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:38:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2264 backedges. 62 proven. 398 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2019-09-05 12:38:14,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:38:14,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-05 12:38:14,106 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-05 12:38:14,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-05 12:38:14,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:38:14,106 INFO L87 Difference]: Start difference. First operand 6436 states and 9651 transitions. Second operand 27 states. [2019-09-05 12:38:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:38:20,647 INFO L93 Difference]: Finished difference Result 6769 states and 10167 transitions. [2019-09-05 12:38:20,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-05 12:38:20,647 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 211 [2019-09-05 12:38:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:38:20,657 INFO L225 Difference]: With dead ends: 6769 [2019-09-05 12:38:20,657 INFO L226 Difference]: Without dead ends: 6766 [2019-09-05 12:38:20,658 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=1573, Unknown=0, NotChecked=0, Total=1722 [2019-09-05 12:38:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6766 states. [2019-09-05 12:38:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6766 to 6440. [2019-09-05 12:38:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6440 states. [2019-09-05 12:38:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6440 states to 6440 states and 9654 transitions. [2019-09-05 12:38:24,653 INFO L78 Accepts]: Start accepts. Automaton has 6440 states and 9654 transitions. Word has length 211 [2019-09-05 12:38:24,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:38:24,653 INFO L475 AbstractCegarLoop]: Abstraction has 6440 states and 9654 transitions. [2019-09-05 12:38:24,653 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-05 12:38:24,653 INFO L276 IsEmpty]: Start isEmpty. Operand 6440 states and 9654 transitions. [2019-09-05 12:38:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-09-05 12:38:24,658 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:38:24,658 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:38:24,658 INFO L418 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:38:24,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:38:24,658 INFO L82 PathProgramCache]: Analyzing trace with hash 344481978, now seen corresponding path program 50 times [2019-09-05 12:38:24,658 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:38:24,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:38:24,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:38:24,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:38:24,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:38:24,662 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:38:24,662 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:38:24,662 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:38:24,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:38:24,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:38:24,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:38:24,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-05 12:38:24,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:38:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2279 backedges. 64 proven. 231 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2019-09-05 12:38:25,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:38:25,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-05 12:38:25,558 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:38:25,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:38:25,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:38:25,558 INFO L87 Difference]: Start difference. First operand 6440 states and 9654 transitions. Second operand 24 states. [2019-09-05 12:38:32,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:38:32,190 INFO L93 Difference]: Finished difference Result 6806 states and 10202 transitions. [2019-09-05 12:38:32,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-05 12:38:32,190 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 214 [2019-09-05 12:38:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:38:32,200 INFO L225 Difference]: With dead ends: 6806 [2019-09-05 12:38:32,200 INFO L226 Difference]: Without dead ends: 6803 [2019-09-05 12:38:32,202 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2019-09-05 12:38:32,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6803 states. [2019-09-05 12:38:36,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6803 to 6444. [2019-09-05 12:38:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6444 states. [2019-09-05 12:38:36,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6444 states to 6444 states and 9653 transitions. [2019-09-05 12:38:36,198 INFO L78 Accepts]: Start accepts. Automaton has 6444 states and 9653 transitions. Word has length 214 [2019-09-05 12:38:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:38:36,198 INFO L475 AbstractCegarLoop]: Abstraction has 6444 states and 9653 transitions. [2019-09-05 12:38:36,198 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:38:36,198 INFO L276 IsEmpty]: Start isEmpty. Operand 6444 states and 9653 transitions. [2019-09-05 12:38:36,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-09-05 12:38:36,203 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:38:36,203 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:38:36,204 INFO L418 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:38:36,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:38:36,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1646814513, now seen corresponding path program 51 times [2019-09-05 12:38:36,204 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:38:36,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:38:36,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:38:36,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:38:36,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:38:36,207 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:38:36,207 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:38:36,207 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:38:36,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:38:36,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-05 12:38:36,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:38:36,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-05 12:38:36,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:38:38,478 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 35 [2019-09-05 12:38:38,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:38:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2817 backedges. 298 proven. 137 refuted. 0 times theorem prover too weak. 2382 trivial. 0 not checked. [2019-09-05 12:38:38,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:38:38,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-05 12:38:38,732 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:38:38,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:38:38,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=175, Unknown=1, NotChecked=0, Total=210 [2019-09-05 12:38:38,733 INFO L87 Difference]: Start difference. First operand 6444 states and 9653 transitions. Second operand 15 states. [2019-09-05 12:38:41,916 WARN L188 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 38 [2019-09-05 12:38:44,433 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 37 [2019-09-05 12:38:47,374 WARN L188 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2019-09-05 12:38:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:38:51,082 INFO L93 Difference]: Finished difference Result 6785 states and 10192 transitions. [2019-09-05 12:38:51,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-05 12:38:51,083 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 220 [2019-09-05 12:38:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:38:51,093 INFO L225 Difference]: With dead ends: 6785 [2019-09-05 12:38:51,093 INFO L226 Difference]: Without dead ends: 6782 [2019-09-05 12:38:51,094 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=123, Invalid=526, Unknown=1, NotChecked=0, Total=650 [2019-09-05 12:38:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6782 states. [2019-09-05 12:38:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6782 to 6490. [2019-09-05 12:38:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6490 states. [2019-09-05 12:38:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6490 states to 6490 states and 9722 transitions. [2019-09-05 12:38:55,327 INFO L78 Accepts]: Start accepts. Automaton has 6490 states and 9722 transitions. Word has length 220 [2019-09-05 12:38:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:38:55,327 INFO L475 AbstractCegarLoop]: Abstraction has 6490 states and 9722 transitions. [2019-09-05 12:38:55,327 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:38:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6490 states and 9722 transitions. [2019-09-05 12:38:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-09-05 12:38:55,332 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:38:55,332 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:38:55,332 INFO L418 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:38:55,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:38:55,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1159228363, now seen corresponding path program 52 times [2019-09-05 12:38:55,333 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:38:55,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:38:55,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:38:55,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:38:55,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:38:55,336 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:38:55,336 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:38:55,337 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:38:55,346 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:38:55,400 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:38:55,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:38:55,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 126 conjunts are in the unsatisfiable core [2019-09-05 12:38:55,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:38:55,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:38:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2287 backedges. 114 proven. 367 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2019-09-05 12:38:56,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:38:56,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-05 12:38:56,100 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-05 12:38:56,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-05 12:38:56,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:38:56,101 INFO L87 Difference]: Start difference. First operand 6490 states and 9722 transitions. Second operand 27 states. [2019-09-05 12:39:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:39:02,866 INFO L93 Difference]: Finished difference Result 7391 states and 11122 transitions. [2019-09-05 12:39:02,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-05 12:39:02,866 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 216 [2019-09-05 12:39:02,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:39:02,878 INFO L225 Difference]: With dead ends: 7391 [2019-09-05 12:39:02,878 INFO L226 Difference]: Without dead ends: 7388 [2019-09-05 12:39:02,880 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2019-09-05 12:39:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2019-09-05 12:39:07,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 6844. [2019-09-05 12:39:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6844 states. [2019-09-05 12:39:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6844 states to 6844 states and 10278 transitions. [2019-09-05 12:39:07,610 INFO L78 Accepts]: Start accepts. Automaton has 6844 states and 10278 transitions. Word has length 216 [2019-09-05 12:39:07,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:39:07,610 INFO L475 AbstractCegarLoop]: Abstraction has 6844 states and 10278 transitions. [2019-09-05 12:39:07,611 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-05 12:39:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 6844 states and 10278 transitions. [2019-09-05 12:39:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-09-05 12:39:07,616 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:39:07,617 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:39:07,617 INFO L418 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:39:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:39:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1960917980, now seen corresponding path program 53 times [2019-09-05 12:39:07,617 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:39:07,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:39:07,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:39:07,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:39:07,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:39:07,621 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:39:07,621 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:39:07,621 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:39:07,631 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:39:13,210 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-05 12:39:13,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:39:13,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 133 conjunts are in the unsatisfiable core [2019-09-05 12:39:13,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:39:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 98 proven. 402 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2019-09-05 12:39:14,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:39:14,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-05 12:39:14,220 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-05 12:39:14,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-05 12:39:14,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2019-09-05 12:39:14,221 INFO L87 Difference]: Start difference. First operand 6844 states and 10278 transitions. Second operand 30 states. [2019-09-05 12:39:22,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:39:22,421 INFO L93 Difference]: Finished difference Result 7245 states and 10890 transitions. [2019-09-05 12:39:22,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-05 12:39:22,421 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 219 [2019-09-05 12:39:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:39:22,432 INFO L225 Difference]: With dead ends: 7245 [2019-09-05 12:39:22,432 INFO L226 Difference]: Without dead ends: 7242 [2019-09-05 12:39:22,434 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=137, Invalid=1669, Unknown=0, NotChecked=0, Total=1806 [2019-09-05 12:39:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7242 states. [2019-09-05 12:39:27,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7242 to 6848. [2019-09-05 12:39:27,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6848 states. [2019-09-05 12:39:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6848 states to 6848 states and 10277 transitions. [2019-09-05 12:39:27,182 INFO L78 Accepts]: Start accepts. Automaton has 6848 states and 10277 transitions. Word has length 219 [2019-09-05 12:39:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:39:27,182 INFO L475 AbstractCegarLoop]: Abstraction has 6848 states and 10277 transitions. [2019-09-05 12:39:27,183 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-05 12:39:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 6848 states and 10277 transitions. [2019-09-05 12:39:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-09-05 12:39:27,189 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:39:27,189 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:39:27,189 INFO L418 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:39:27,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:39:27,189 INFO L82 PathProgramCache]: Analyzing trace with hash 8196379, now seen corresponding path program 54 times [2019-09-05 12:39:27,189 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:39:27,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:39:27,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:39:27,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:39:27,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:39:27,192 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:39:27,192 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:39:27,192 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:39:27,205 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:39:27,253 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-05 12:39:27,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:39:27,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 88 conjunts are in the unsatisfiable core [2019-09-05 12:39:27,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:39:27,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:39:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2828 backedges. 243 proven. 301 refuted. 0 times theorem prover too weak. 2284 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:39:27,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:39:27,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-05 12:39:27,748 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:39:27,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:39:27,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:39:27,749 INFO L87 Difference]: Start difference. First operand 6848 states and 10277 transitions. Second operand 15 states. [2019-09-05 12:39:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:39:33,140 INFO L93 Difference]: Finished difference Result 6940 states and 10376 transitions. [2019-09-05 12:39:33,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-05 12:39:33,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 225 [2019-09-05 12:39:33,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:39:33,152 INFO L225 Difference]: With dead ends: 6940 [2019-09-05 12:39:33,152 INFO L226 Difference]: Without dead ends: 6937 [2019-09-05 12:39:33,154 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:39:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6937 states. [2019-09-05 12:39:36,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6937 to 5322. [2019-09-05 12:39:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5322 states. [2019-09-05 12:39:36,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5322 states to 5322 states and 7759 transitions. [2019-09-05 12:39:36,972 INFO L78 Accepts]: Start accepts. Automaton has 5322 states and 7759 transitions. Word has length 225 [2019-09-05 12:39:36,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:39:36,972 INFO L475 AbstractCegarLoop]: Abstraction has 5322 states and 7759 transitions. [2019-09-05 12:39:36,972 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:39:36,972 INFO L276 IsEmpty]: Start isEmpty. Operand 5322 states and 7759 transitions. [2019-09-05 12:39:36,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-05 12:39:36,977 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:39:36,977 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:39:36,977 INFO L418 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:39:36,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:39:36,978 INFO L82 PathProgramCache]: Analyzing trace with hash -415604442, now seen corresponding path program 55 times [2019-09-05 12:39:36,978 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:39:36,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:39:36,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:39:36,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:39:36,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:39:36,981 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:39:36,981 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:39:36,981 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:39:36,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:39:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:39:37,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-05 12:39:37,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:39:37,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:39:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 72 proven. 246 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2019-09-05 12:39:37,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:39:37,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-05 12:39:37,722 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-05 12:39:37,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-05 12:39:37,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:39:37,722 INFO L87 Difference]: Start difference. First operand 5322 states and 7759 transitions. Second operand 22 states. [2019-09-05 12:39:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:39:44,176 INFO L93 Difference]: Finished difference Result 5705 states and 8362 transitions. [2019-09-05 12:39:44,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:39:44,177 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 228 [2019-09-05 12:39:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:39:44,186 INFO L225 Difference]: With dead ends: 5705 [2019-09-05 12:39:44,186 INFO L226 Difference]: Without dead ends: 5702 [2019-09-05 12:39:44,187 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2019-09-05 12:39:44,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5702 states. [2019-09-05 12:39:48,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5702 to 5349. [2019-09-05 12:39:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5349 states. [2019-09-05 12:39:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5349 states to 5349 states and 7789 transitions. [2019-09-05 12:39:48,099 INFO L78 Accepts]: Start accepts. Automaton has 5349 states and 7789 transitions. Word has length 228 [2019-09-05 12:39:48,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:39:48,100 INFO L475 AbstractCegarLoop]: Abstraction has 5349 states and 7789 transitions. [2019-09-05 12:39:48,100 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-05 12:39:48,100 INFO L276 IsEmpty]: Start isEmpty. Operand 5349 states and 7789 transitions. [2019-09-05 12:39:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-05 12:39:48,105 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:39:48,105 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:39:48,105 INFO L418 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:39:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:39:48,105 INFO L82 PathProgramCache]: Analyzing trace with hash -902086524, now seen corresponding path program 56 times [2019-09-05 12:39:48,105 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:39:48,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:39:48,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:39:48,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:39:48,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:39:48,108 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:39:48,109 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:39:48,109 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:39:48,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:39:48,199 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:39:48,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:39:48,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 105 conjunts are in the unsatisfiable core [2019-09-05 12:39:48,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:39:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 72 proven. 246 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2019-09-05 12:39:48,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:39:48,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-05 12:39:48,850 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-05 12:39:48,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-05 12:39:48,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:39:48,850 INFO L87 Difference]: Start difference. First operand 5349 states and 7789 transitions. Second operand 22 states. [2019-09-05 12:39:55,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:39:55,506 INFO L93 Difference]: Finished difference Result 5726 states and 8381 transitions. [2019-09-05 12:39:55,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:39:55,506 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 228 [2019-09-05 12:39:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:39:55,515 INFO L225 Difference]: With dead ends: 5726 [2019-09-05 12:39:55,516 INFO L226 Difference]: Without dead ends: 5723 [2019-09-05 12:39:55,517 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2019-09-05 12:39:55,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2019-09-05 12:39:59,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 5357. [2019-09-05 12:39:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5357 states. [2019-09-05 12:39:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5357 states to 5357 states and 7795 transitions. [2019-09-05 12:39:59,428 INFO L78 Accepts]: Start accepts. Automaton has 5357 states and 7795 transitions. Word has length 228 [2019-09-05 12:39:59,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:39:59,428 INFO L475 AbstractCegarLoop]: Abstraction has 5357 states and 7795 transitions. [2019-09-05 12:39:59,428 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-05 12:39:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 5357 states and 7795 transitions. [2019-09-05 12:39:59,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-05 12:39:59,433 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:39:59,433 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:39:59,433 INFO L418 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:39:59,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:39:59,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1194017596, now seen corresponding path program 57 times [2019-09-05 12:39:59,434 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:39:59,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:39:59,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:39:59,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:39:59,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:39:59,437 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:39:59,437 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:39:59,437 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:39:59,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:39:59,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-05 12:39:59,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:39:59,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 96 conjunts are in the unsatisfiable core [2019-09-05 12:39:59,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:40:00,307 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-09-05 12:40:00,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:40:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 197 proven. 190 refuted. 0 times theorem prover too weak. 2451 trivial. 0 not checked. [2019-09-05 12:40:00,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:40:00,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-05 12:40:00,656 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 12:40:00,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 12:40:00,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:40:00,657 INFO L87 Difference]: Start difference. First operand 5357 states and 7795 transitions. Second operand 21 states. [2019-09-05 12:40:07,454 WARN L188 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2019-09-05 12:40:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:40:14,043 INFO L93 Difference]: Finished difference Result 5828 states and 8471 transitions. [2019-09-05 12:40:14,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-05 12:40:14,044 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 228 [2019-09-05 12:40:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:40:14,053 INFO L225 Difference]: With dead ends: 5828 [2019-09-05 12:40:14,053 INFO L226 Difference]: Without dead ends: 5825 [2019-09-05 12:40:14,055 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2019-09-05 12:40:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5825 states. [2019-09-05 12:40:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5825 to 5347. [2019-09-05 12:40:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5347 states. [2019-09-05 12:40:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5347 states to 5347 states and 7729 transitions. [2019-09-05 12:40:17,926 INFO L78 Accepts]: Start accepts. Automaton has 5347 states and 7729 transitions. Word has length 228 [2019-09-05 12:40:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:40:17,927 INFO L475 AbstractCegarLoop]: Abstraction has 5347 states and 7729 transitions. [2019-09-05 12:40:17,927 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 12:40:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5347 states and 7729 transitions. [2019-09-05 12:40:17,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-05 12:40:17,931 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:40:17,932 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:40:17,932 INFO L418 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:40:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:40:17,932 INFO L82 PathProgramCache]: Analyzing trace with hash 798193314, now seen corresponding path program 58 times [2019-09-05 12:40:17,932 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:40:17,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:40:17,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:40:17,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:40:17,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:40:17,936 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:40:17,936 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:40:17,936 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:40:17,946 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:40:17,996 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:40:17,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:40:17,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 102 conjunts are in the unsatisfiable core [2019-09-05 12:40:18,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:40:18,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:40:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 109 proven. 413 refuted. 0 times theorem prover too weak. 2316 trivial. 0 not checked. [2019-09-05 12:40:18,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:40:18,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-05 12:40:18,666 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-05 12:40:18,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-05 12:40:18,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:40:18,667 INFO L87 Difference]: Start difference. First operand 5347 states and 7729 transitions. Second operand 25 states. [2019-09-05 12:40:22,874 WARN L188 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2019-09-05 12:40:26,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:40:26,738 INFO L93 Difference]: Finished difference Result 5830 states and 8410 transitions. [2019-09-05 12:40:26,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:40:26,738 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 228 [2019-09-05 12:40:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:40:26,748 INFO L225 Difference]: With dead ends: 5830 [2019-09-05 12:40:26,748 INFO L226 Difference]: Without dead ends: 5827 [2019-09-05 12:40:26,749 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2019-09-05 12:40:26,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5827 states. [2019-09-05 12:40:30,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5827 to 5563. [2019-09-05 12:40:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5563 states. [2019-09-05 12:40:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5563 states to 5563 states and 8088 transitions. [2019-09-05 12:40:30,998 INFO L78 Accepts]: Start accepts. Automaton has 5563 states and 8088 transitions. Word has length 228 [2019-09-05 12:40:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:40:30,999 INFO L475 AbstractCegarLoop]: Abstraction has 5563 states and 8088 transitions. [2019-09-05 12:40:30,999 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-05 12:40:30,999 INFO L276 IsEmpty]: Start isEmpty. Operand 5563 states and 8088 transitions. [2019-09-05 12:40:31,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-05 12:40:31,004 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:40:31,004 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:40:31,004 INFO L418 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:40:31,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:40:31,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1483711202, now seen corresponding path program 59 times [2019-09-05 12:40:31,004 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:40:31,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:40:31,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:40:31,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:40:31,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:40:31,007 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:40:31,007 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:40:31,007 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:40:31,018 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:40:31,178 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-05 12:40:31,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:40:31,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 112 conjunts are in the unsatisfiable core [2019-09-05 12:40:31,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:40:31,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:40:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 119 proven. 304 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2019-09-05 12:40:32,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:40:32,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-05 12:40:32,015 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-05 12:40:32,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-05 12:40:32,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:40:32,015 INFO L87 Difference]: Start difference. First operand 5563 states and 8088 transitions. Second operand 25 states. [2019-09-05 12:40:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:40:40,002 INFO L93 Difference]: Finished difference Result 6301 states and 9249 transitions. [2019-09-05 12:40:40,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-05 12:40:40,002 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 228 [2019-09-05 12:40:40,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:40:40,011 INFO L225 Difference]: With dead ends: 6301 [2019-09-05 12:40:40,012 INFO L226 Difference]: Without dead ends: 6298 [2019-09-05 12:40:40,013 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2019-09-05 12:40:40,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6298 states. [2019-09-05 12:40:44,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6298 to 5937. [2019-09-05 12:40:44,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5937 states. [2019-09-05 12:40:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5937 states to 5937 states and 8673 transitions. [2019-09-05 12:40:44,647 INFO L78 Accepts]: Start accepts. Automaton has 5937 states and 8673 transitions. Word has length 228 [2019-09-05 12:40:44,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:40:44,647 INFO L475 AbstractCegarLoop]: Abstraction has 5937 states and 8673 transitions. [2019-09-05 12:40:44,648 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-05 12:40:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 5937 states and 8673 transitions. [2019-09-05 12:40:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-09-05 12:40:44,653 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:40:44,653 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:40:44,653 INFO L418 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:40:44,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:40:44,653 INFO L82 PathProgramCache]: Analyzing trace with hash 142704433, now seen corresponding path program 60 times [2019-09-05 12:40:44,654 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:40:44,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:40:44,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:40:44,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:40:44,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:40:44,657 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:40:44,657 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:40:44,657 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:40:44,666 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:40:44,743 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-05 12:40:44,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:40:44,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-05 12:40:44,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:40:45,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:40:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 317 proven. 152 refuted. 0 times theorem prover too weak. 2382 trivial. 0 not checked. [2019-09-05 12:40:45,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:40:45,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-05 12:40:45,233 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:40:45,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:40:45,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:40:45,233 INFO L87 Difference]: Start difference. First operand 5937 states and 8673 transitions. Second operand 19 states. [2019-09-05 12:40:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:40:51,295 INFO L93 Difference]: Finished difference Result 6385 states and 9325 transitions. [2019-09-05 12:40:51,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 12:40:51,296 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 231 [2019-09-05 12:40:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:40:51,306 INFO L225 Difference]: With dead ends: 6385 [2019-09-05 12:40:51,306 INFO L226 Difference]: Without dead ends: 6382 [2019-09-05 12:40:51,307 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:40:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6382 states. [2019-09-05 12:40:55,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6382 to 5989. [2019-09-05 12:40:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5989 states. [2019-09-05 12:40:56,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5989 states to 5989 states and 8719 transitions. [2019-09-05 12:40:56,008 INFO L78 Accepts]: Start accepts. Automaton has 5989 states and 8719 transitions. Word has length 231 [2019-09-05 12:40:56,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:40:56,008 INFO L475 AbstractCegarLoop]: Abstraction has 5989 states and 8719 transitions. [2019-09-05 12:40:56,008 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:40:56,008 INFO L276 IsEmpty]: Start isEmpty. Operand 5989 states and 8719 transitions. [2019-09-05 12:40:56,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-09-05 12:40:56,013 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:40:56,014 INFO L399 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:40:56,014 INFO L418 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:40:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:40:56,014 INFO L82 PathProgramCache]: Analyzing trace with hash -334165991, now seen corresponding path program 61 times [2019-09-05 12:40:56,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:40:56,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:40:56,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:40:56,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:40:56,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:40:56,017 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:40:56,017 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:40:56,018 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:40:56,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:40:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:40:56,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-05 12:40:56,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:40:56,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:40:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 72 proven. 259 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2019-09-05 12:40:56,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:40:56,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-05 12:40:56,840 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 12:40:56,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 12:40:56,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:40:56,840 INFO L87 Difference]: Start difference. First operand 5989 states and 8719 transitions. Second operand 23 states.